US20140206667A1 - Methods and compositions for treating schizophrenia - Google Patents

Methods and compositions for treating schizophrenia Download PDF

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US20140206667A1
US20140206667A1 US14/080,531 US201314080531A US2014206667A1 US 20140206667 A1 US20140206667 A1 US 20140206667A1 US 201314080531 A US201314080531 A US 201314080531A US 2014206667 A1 US2014206667 A1 US 2014206667A1
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Michela Gallagher
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Johns Hopkins University
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Assigned to THE JOHNS HOPKINS UNIVERSITY reassignment THE JOHNS HOPKINS UNIVERSITY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GALLAGHER, MICHELA
Assigned to THE JOHNS HOPKINS UNIVERSITY reassignment THE JOHNS HOPKINS UNIVERSITY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOH, MING TENG
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A61K31/4015—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil having oxo groups directly attached to the heterocyclic ring, e.g. piracetam, ethosuximide
    • A—HUMAN NECESSITIES
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    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19—Carboxylic acids, e.g. valproic acid
    • A61K31/20—Carboxylic acids, e.g. valproic acid having a carboxyl group bound to a chain of seven or more carbon atoms, e.g. stearic, palmitic, arachidic acids
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A61K31/407—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil condensed with other heterocyclic ring systems, e.g. ketorolac, physostigmine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
    • A61K31/445—Non condensed piperidines, e.g. piperocaine
    • A61K31/4523—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems
    • A61K31/454—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. pimozide, domperidone
    • A—HUMAN NECESSITIES
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    • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
    • A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
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    • A61K31/55—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
    • A61K31/551—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogen atoms, e.g. dilazep
    • A61K31/5513—1,4-Benzodiazepines, e.g. diazepam or clozapine
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    • A61P25/18—Antipsychotics, i.e. neuroleptics; Drugs for mania or schizophrenia
    • A—HUMAN NECESSITIES
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system

Definitions

  • the invention relates to methods and compositions for treating schizophrenia or bipolar disorder (in particular, mania).
  • schizophrenia or bipolar disorder in particular, mania
  • it relates to the use of a combination of a synaptic vesicle protein 2A (SV2A) inhibitor and an antipsychotic in treating a subject having or at risk for schizophrenia or bipolar disorder (in particular, mania).
  • SV2A synaptic vesicle protein 2A
  • Schizophrenia is a chronic psychiatric disorder, characterized by a wide spectrum of psychopathology, including positive symptoms such as aberrant or distorted mental representations (e.g., hallucinations, delusions), negative symptoms characterized by diminution of motivation and adaptive goal-directed action (e.g., anhedonia, affective flattening, avolition), and cognitive impairment. While abnormalities in the brain are proposed to underlie the full spectrum of psychopathology in schizophrenia, currently available antipsychotics are largely ineffective in treating cognitive impairments in schizophrenia patients.
  • Cognitive impairments in schizophrenia involve both frontal and temporal lobe functions that include memory, attention, processing speed, and executive control.
  • Recent observations, drawn from preclinical animal models and human neuroimaging studies, indicate that altered brain activity/excitability in the medial temporal lobe memory system may contribute to cognitive impairment and may also play a role in augmenting psychotic symptoms due to disinhibition of dopaminergic neurons.
  • Cognitive deficits are increasingly recognized as a key clinical feature that can be detected in a prodromal phase and in remission, as well as during full expression of the illness but are not effectively treated by available antipsychotics. Because untreated features of schizophrenia, especially impaired cognition, predict long-term disability in patients (Green et al., Schizophr. Res. 2004, 72, 41-45), it is critical to develop effective therapies for the spectrum of this illness.
  • a method for treating a subject suffering from schizophrenia or bipolar disorder (in particular, mania), or at risk thereof comprising the step of administering to said subject a therapeutically effective amount of a SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate, or polymorph thereof in combination with a therapeutically effective amount of an antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate, or polymorph thereof.
  • the methods of the present invention treat one or more positive and/or negative symptoms, as well as cognitive impairment, associated with schizophrenia.
  • the methods of the present invention treat one or more symptoms, as well as cognitive impairment, associated with bipolar disorder (in particular, mania).
  • the methods of this invention prevent or slow the progression of cognitive impairment or bipolar disorder (in particular, mania) of schizophrenia in said subject.
  • the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof that is useful in the methods and compositions of this aspect of the invention include those disclosed in, for example, United States (U.S.) patent application Ser. No. 12/580,464, International Patent Application PCT/US2009/005647, U.S. Patent Application 61/105,847, U.S. Patent Application 61/152,631, and U.S. Patent Application 61/175,536.
  • any SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof may be used in the methods and compositions of this aspect of the invention.
  • the SV2A inhibitor is selected from the group of SV2A inhibitors referred to in International Patent Applications WO2010/144712; WO2010/002869; WO2008/132139; WO2007/065595; WO2006/128693; WO2006/128692; WO2005/054188; WO2004/087658; WO2002/094787; WO2001/062726; U.S. Pat. Nos. 7,465,549; 7,244,747; 5,334,720; 4,696,943; 4,696,942; U.S.
  • the SV2A inhibitor is selected from the group consisting of levetiracetam, brivaracetam, and seletracetam or derivatives or analogs or pharmaceutically acceptable salts, hydrates, solvates, or polymorphs thereof.
  • the SV2A inhibitor is levetiracetam or a derivative or an analog or a pharmaceutically acceptable salt, hydrate, solvate, or polymorph thereof.
  • the SV2A inhibitor is brivaracetam or a derivative or an analog or a pharmaceutically acceptable salt, hydrate, solvate, or polymorph thereof. In other embodiments, the SV2A inhibitor is seletracetam or a derivative or an analog or a pharmaceutically acceptable salt, hydrate, solvate, or polymorph thereof.
  • the antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof that is useful in the methods and compositions of this invention include both typical and atypical antipsychotics.
  • the antipsychotics suitable for use in the present invention are selected from atypical antipsychotics, including, but not limited to, those disclosed in, for example, U.S. Pat. Nos. 4,734,416; 5,006,528; 4,145,434; 5,763,476; 3,539,573; 5,229,382; 5,532,372; 4,879,288; 4,804,663; 4,710,500; 4,831,031; and 5,312,925, and EP Patents EP402644 and EP368388, and the pharmaceutically acceptable salts, hydrates, solvates, and polymorphs thereof.
  • atypical antipsychotics including, but not limited to, those disclosed in, for example, U.S. Pat. Nos. 4,734,416; 5,006,528; 4,145,434; 5,763,476; 3,539,573; 5,229,382; 5,532,372; 4,879,288; 4,804,663; 4,710,500; 4,831,0
  • atypical antipsychotics suitable for use in the present invention include, but are not limited to, aripiprazole, asenapine, clozapine, iloperidone, olanzapine, lurasidone, paliperidone, quetiapine, risperidone and ziprasidone, and the pharmaceutically acceptable salts, hydrates, solvates, and polymorphs thereof.
  • the antipsychotic of this invention is selected from aripiprazole (Bristol-Myers Squibb), olanzapine (Lilly) and ziprasidone (Pfizer), and the pharmaceutically acceptable salts, hydrates, solvates, and polymorphs thereof.
  • the antipsychotics suitable for use in the present invention are typical antipsychotics, including, but not limited to, acepromazine, benperidol, bromazepam, bromperidol, chlorpromazine, chlorprothixene, clotiapine, cyamemazine, diazepam, dixyrazine, droperidol, flupentixol, fluphenazine, fluspirilene, haloperidol, heptaminol, isopropamide iodide, levomepromazine, levosulpiride, loxapine, melperone, mesoridazine, molindone, oxypertine, oxyprothepine, penfluridol, perazine, periciazine, perphenazine, pimozide, pipamperone, pipotiazine, prochlorperazine, promazine, promethazine, prothip
  • the antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof may be selected from compounds that are dopaminergic agents (such as dopamine D1 receptor antagonists or agonists, dopamine D 2 receptor antagonists or partial agonists, dopamine D3 receptor antagonists or partial agonists, dopamine D4 receptor antagonists), glutamatergic agents, N-methyl-D-aspartate (NMDA) receptor positive allosteric modulators, glycine reuptake inhibitors, glutamate reuptake inhibitor, metabotropic glutamate receptors (mGluRs) agonists or positive allosteric modulators (PAMs) (e.g., mGluR2/3 agonists or PAMs), glutamate receptor glur5 positive allosteric modulators (PAMs), M1 muscarinic acetylcholine receptor (mAChR) positive allosteric modulators (PAMs), histamine H3 receptor antagonist
  • dopaminergic agents such
  • the antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof that is useful in the methods and compositions of this invention include compounds that may be used to treat at least one sign or symptom of schizophrenia or bipolar disorder (in particular, mania).
  • the antipsychotic is administered at a dose that is subtherapeutic as compared to the dose at which it is therapeutically effective when administered in the absence of the SV2A inhibitor.
  • the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof can be administered at doses as disclosed, for example, in U.S. patent application Ser. No. 12/580,464, International Patent Application PCT/US2009/005647, U.S. Patent Application 61/105,847, U.S. Patent Application 61/152,631, U.S. Patent Application 61/175,536, and U.S. Patent Application 61/441,251.
  • the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof is administered every 12 or 24 hours at a daily dose of about 0.001 mg/kg to 5 mg/kg.
  • the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof is administered every 12 or 24 hours at a daily dose of about 0.1 to 5 mg/kg, or about 1 to 2 mg/kg, or about 0.1 to 0.2 mg/kg, or about 0.01 to 2.5 mg/kg, or about 0.1 to 2.5 mg/kg, or about 0.4 to 2.5 mg/kg, or about 0.6 to 1.8 mg/kg, or about 0.04 to 2.5 mg/kg, or about 0.06 to 1.8 mg/kg, or about 0.01 to 1 mg/kg, or about 0.001 to 1 mg/kg, or about 0.5 mg/kg to 5 mg/kg, or about 0.05 mg/kg to 0.5 mg/kg.
  • the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof is administered every 12 or 24 hours at a daily dose of about 0.1 to 0.2 mg/kg, or about 0.01 to 2.5 mg/kg, or about 0.1 to 2.5 mg/kg, or about 0.4 to 2.5 mg/kg, or about 0.6 to 1.8 mg/kg, or about 0.04 to 2.5 mg/kg, or about 0.06 to 1.8 mg/kg, or about 2.0 to 4.0 mg/kg, or about 2.0 to 3.0 mg/kg, or about 3.0 to 4.0 mg/kg, or about 0.2 to 0.4 mg/kg, or about 0.2 to 0.3 mg/kg, or about 0.3 to 0.4 mg/kg, or about 0.001-5 mg/kg, or about 0.001-0.5 mg/kg, or about 0.01-0.5 mg/kg.
  • the SV2A inhibitor may be selected from the group consisting of levetiracetam, brivaracetam, and seletracetam or derivatives or analogs or pharmaceutically acceptable salts, hydrates, solvates, or polymorphs thereof, said SV2A inhibitor being administered every 12 or 24 hours at a daily dose selected from any of the above.
  • the SV2A inhibitor and the antipsychotic, or their pharmaceutically acceptable salts, hydrates, solvates or polymorphs are administered simultaneously, or sequentially, or in a single formulation, or in separate formulations packaged together.
  • the SV2A inhibitor and the antipsychotic, or their pharmaceutically acceptable salts, hydrates, solvates or polymorphs are administered via different routes.
  • “combination” includes administration by any of these formulations or routes of administration.
  • the combined treatment has a longer or improved therapeutic effect in the subject than is attained by administering the antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof in the absence of the SV2A inhibitor or a pharmaceutically acceptable salt, solvate, hydrate, or polymorph thereof by at least about 1.5 ⁇ , or 2.0 ⁇ , or 2.5 ⁇ , or 3.0 ⁇ , or 3.5 ⁇ , or 4.0 ⁇ , or 4.5 ⁇ , or 5.0 ⁇ , or 5.5 ⁇ , or 6.0 ⁇ , or 6.5 ⁇ , or 7.0 ⁇ , or 7.5 ⁇ , or 8.0 ⁇ , or 8.5 ⁇ , or 9.0 ⁇ , or 9.5 ⁇ , or 10 ⁇ , or greater than about 10 ⁇ .
  • the combined treatment has a longer or improved therapeutic effect in the subject than is attained by administering the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof in the absence of the antipsychotic or a pharmaceutically acceptable salt, solvate, hydrate, or polymorph thereof by at least about 1.5 ⁇ , or 2.0 ⁇ , or 2.5 ⁇ , or 3.0 ⁇ , or 3.5 ⁇ , or 4.0 ⁇ , or 4.5 ⁇ , or 5.0 ⁇ , or 5.5 ⁇ , or 6.0 ⁇ , or 6.5 ⁇ , or 7.0 ⁇ , or 7.5 ⁇ , or 8.0 ⁇ , or 8.5 ⁇ , or 9.0 ⁇ , or 9.5 ⁇ , or 10 ⁇ , or greater than about 10 ⁇ .
  • a method of increasing the therapeutic index of an antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof in a method of treating schizophrenia or bipolar disorder (in particular, mania) in a subject in need or at risk thereof comprising administering a SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof in combination with the antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof to said subject.
  • the increase in the therapeutic index of the antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof is greater than the therapeutic index of the antipsychotic or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof when administered in the absence of the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof by at least about 1.5 ⁇ , or 2.0 ⁇ , or 2.5 ⁇ , or 3.0 ⁇ , or 3.5 ⁇ , or 4.0 ⁇ , or 4.5 ⁇ , or 5.0 ⁇ , or 5.5 ⁇ , or 6.0 ⁇ , or 6.5 ⁇ , or 7.0 ⁇ , or 7.5 ⁇ , or 8.0 ⁇ , or 8.5 ⁇ , or 9.0 ⁇ , or 9.5 ⁇ , or 10 ⁇ , or greater than about 10 ⁇ .
  • a pharmaceutical composition for treating a subject suffering from schizophrenia or bipolar disorder (in particular, mania), or at risk thereof comprising a SV2A inhibitor and an antipsychotic or their pharmaceutically acceptable salts, hydrates, solvates or polymorphs thereof.
  • the composition of this invention is for treating one or more positive and/or negative symptoms, as well as cognitive impairment, associated with schizophrenia.
  • the composition of this invention is for treating one or more symptoms, as well as cognitive impairment, associated with bipolar disorder (in particular, mania).
  • the composition is in a liquid form.
  • the composition is in an aqueous solution.
  • the composition is in a suspension form.
  • the composition is in a sustained release form, or a controlled release form, or a delayed release form, or an extended release form. In some embodiments, the composition is in a unit dosage form. In other embodiments, the two components of the compositions are in separate delivery forms packaged together.
  • the composition comprises levetiracetam, brivaracetam, seletracetam, or a derivative or an analog or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof and an antipsychotic or a derivative or an analog or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof.
  • the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof in the composition is present in an amount of 0.07-350 mg, or 50-250 mg, or 3-50 mg. In some embodiments, the SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof is present in an amount less than 350 mg, less than 250 mg, less than 200 mg, less than 150 mg, less than 100 mg, less than 50 mg, less than 10 mg, less than 5 mg, less than 1 mg, less than 0.5 mg, less than 0.1 mg, or less than 0.07 mg.
  • the SV2A inhibitor is present in an amount of 0.07-60 mg, 0.07-350 mg, 25-60 mg, 25-125 mg, 50-250 mg, 5-140 mg, 0.7-180 mg, 125-240 mg, 3-50 mg, or 3-60 mg. In other embodiments of this aspect of the invention, the SV2A inhibitor is present in an amount of 0.05-35 mg. In some embodiments of the composition of this invention, the SV2A inhibitor may be selected from the group consisting of levetiracetam, brivaracetam, and seletracetam or derivatives or analogs or pharmaceutically acceptable salts, hydrates, solvates, or polymorphs thereof, said SV2A inhibitor being present in an amount selected from any of the above.
  • FIG. 1 depicts increased mRNA expression of the gene encoding SV2A in the dentate gyrus of the hippocampus of aged-impaired rats (AI) as compared to young rats (Y) and aged-unimpaired rats (AU).
  • Normalized Affymetrix GeneChip probe set signal values (Y-axis), as a measure of mRNA expression, are plotted against learning indices of different rats, as a measure of cognitive impairment.
  • FIG. 2 depicts the effects of administering levetiracetam on the spatial memory retention of six aged-impaired rats (AI) in a Morris Water Maze (MWM) test.
  • AI aged-impaired rats
  • MLM Morris Water Maze
  • Three treatment conditions were employed: vehicle control, levetiracetam (5 mg/kg/day) and levetiracetam (10 mg/kg/day).
  • the AI rats were trained for two consecutive days, with a one-time treatment prior to the training trials per day. 24 hours later, the AI rats were tested. The time the AI rats, 24 hours after treatment with the different conditions and two days of training, spent swimming in the target quadrant or the target annulus in a memory retention trial is used as a measure of spatial memory retention.
  • the target quadrant refers to the quadrant of the maze (which is a circular pool) where the escape platform is placed during the training trials.
  • the target annulus refers to the exact location of the escape platform during the training trials.
  • FIG. 3 depicts the effects of administering levetiracetam on the spatial memory retention of ten aged-impaired rats (AI) in an eight-arm Radial Arm Maze (RAM) test.
  • Six treatment conditions were employed: vehicle control, levetiracetam (1.25 mg/kg), levetiracetam (2.5 mg/kg), levetiracetam (5 mg/kg), levetiracetam (10 mg/kg) and levetiracetam (20 mg/kg).
  • vehicle control levetiracetam (1.25 mg/kg
  • levetiracetam 2.5 mg/kg
  • levetiracetam 5 mg/kg
  • levetiracetam (10 mg/kg) levetiracetam
  • levetiracetam (20 mg/kg levetiracetam
  • Rats were pre-treated 30-40 minutes before daily trials with a one-time drug/control treatment.
  • the number of errors made by the rats after the delay was used as a measure of spatial memory retention. Errors were defined as instances when rats entered an arm from which food had already been retrieved in the pre-delay component of the trial or when rats re-visited an arm in the post-delay session that had already been visited. Paired t-tests were used to compare the number of errors between different doses of levetiracetam and vehicle control.
  • FIG. 4 depicts the effects of administering levetiracetam or valproate separately on the spatial memory retention of ten aged-impaired rats (AI) in an eight-arm Radial Arm Maze (RAM) test.
  • FIG. 5 depicts the effects of administering levetiracetam or valproate in combination on the spatial memory retention often aged-impaired rats (AI) in an eight-arm Radial Arm Maze (RAM) test.
  • FIG. 6 shows an isobologram plotting levetiracetam dose against valproate dose.
  • the diagonal straight line is the line of additivity, anchored on each axis by the lowest effective doses of valproate and levetiracetam when assessed individually.
  • FIG. 7 depicts the experimental design of the human trials for levetiracetam treatment.
  • FIG. 8A depicts the average activity in the left CA3 of aMCI subjects with placebo treatment and age-matched control subjects with placebo treatment during the presentation of lure stimuli that the subject correctly identified as “similar.”
  • FIG. 8B depicts the average activity in the left CA3 of aMCI subjects with placebo treatment or levetiracetam treatment (125 mg twice a day for two weeks) during the presentation of lure stimuli that the subject correctly identified as “similar.”
  • FIG. 8C is a table of the data represented in FIGS. 8A and 8B .
  • FIG. 9A depicts the average activity in the left entorhinal cortex of age-matched control subjects with placebo treatment and aMCI subjects with placebo treatment during the presentation of lure stimuli that the subject correctly identified as “similar.”
  • FIG. 9B depicts the average activity in the left entorhinal cortex of the same aMCI subjects with placebo treatment or levetiracetam treatment (125 mg twice a day for two weeks) during the presentation of lure stimuli that the subject correctly identified as “similar.”
  • FIG. 9C is a table of the data represented in FIGS. 9A and 9B .
  • FIG. 10A depicts an example of the sequence of images shown to subjects in the explicit 3-alternative forced choice task described in Example 2.
  • FIG. 10B shows sample pairs of similar (“lure”) images.
  • FIG. 11 shows the difference between the aMCI (placebo) subjects and age-matched control (placebo) subjects in their performance of the explicit 3-alternative forced choice task described in Example 2.
  • Each bar represents the proportion of the subject responses (old, similar, or new) when presented with a lure image.
  • FIG. 12 shows the difference between the same aMCI subjects with placebo treatment or with levetiracetam treatment (125 mg twice a day for two weeks) in their performance of the explicit 3-alternative forced choice task described in Example 2.
  • Each bar represents the proportion of the subjects responses (old, similar, or new) when presented with a lure image.
  • FIG. 13 is a table of the data represented in FIGS. 11 and 12 .
  • FIG. 14A shows the difference between the age-matched control (placebo) subjects and the aMCI subjects treated with placebo or with levetiracetam (125 mg twice a day for two weeks) in their performance of the Buschke Selective reminding Test—Delayed Recall.
  • FIG. 14B is a table of the data represented in FIG. 14A .
  • FIG. 15A shows the difference between the control (placebo) subjects and the aMCI subjects treated with placebo or with levetiracetam (125 mg twice a day for two weeks) in their performance of the Benton Visual Retention Test.
  • FIG. 15B is a table of the data represented in FIG. 15A .
  • FIG. 16A shows the difference between the control (placebo) subjects and the aMCI subjects treated with placebo or with levetiracetam (125 mg twice a day for two weeks) in their performance of the Verbal Paired Associates Test—Recognition.
  • FIG. 16B is a table of the data represented in FIG. 16A .
  • FIG. 17A shows the difference between the control (placebo) subjects and the aMCI subjects treated with placebo or with levetiracetam (125 mg twice a day for two weeks) in their performance of the Verbal Paired Associates Test—Delayed Recall.
  • FIG. 17B is a table of the data represented in FIG. 17A .
  • FIG. 18A is a table showing the subject selection process for the human levetiracetam trial described in Example 2.
  • FIG. 18B is a table showing the characteristics of the subjects selected for the human levetiracetam trial described in Example 2.
  • agent is used herein to denote a chemical compound (such as an organic or inorganic compound, a mixture of chemical compounds), a biological macromolecule (such as a nucleic acid, an antibody, including parts thereof as well as humanized, chimeric and human antibodies and monoclonal antibodies, a protein or portion thereof, e.g., a peptide, a lipid, a carbohydrate), or an extract made from biological materials such as bacteria, plants, fungi, or animal (particularly mammalian) cells or tissues.
  • Agents include, for example, agents which are known with respect to structure, and those which are not known with respect to structure.
  • a “patient”, “subject”, or “individual” are used interchangeably and refer to either a human or a non-human animal. These terms include mammals, such as humans, primates, livestock animals (including bovines, porcines, etc.), companion animals (e.g., canines, felines, etc.) and rodents (e.g., mice and rats).
  • “Cognitive function” or “cognitive status” refers to any higher order intellectual brain process or brain state, respectively, involved in learning and/or memory including, but not limited to, attention, information acquisition, information processing, working memory, short-term memory, long-term memory, anterograde memory, retrograde memory, memory retrieval, discrimination learning, decision-making, inhibitory response control, attentional set-shifting, delayed reinforcement learning, reversal learning, the temporal integration of voluntary behavior, expressing an interest in one's surroundings and self-care, speed of processing, reasoning and problem solving and social cognition.
  • cognitive function may be measured, for example and without limitation, by the clinical global impression of change scale (CIBIC-plus scale); the Mini Mental State Exam (MMSE); the Neuropsychiatric Inventory (NPI); the Clinical Dementia Rating Scale (CDR); the Cambridge Neuropsychological Test Automated Battery (CANTAB); the Sandoz Clinical Assessment-Geriatric (SCAG), the Buschke Selective Reminding Test (Buschke and Fuld, 1974); the Verbal Paired Associates subtest; the Logical Memory subtest; the Visual Reproduction subtest of the Wechsler Memory Scale-Revised (WMS-R) (Wechsler, 1997); the Benton Visual Retention Test, or the explicit 3-alternative forced choice task, or MATRICS consensus neuropsychological test battery.
  • CBIIC-plus scale the Mini Mental State Exam
  • NPI Neuropsychiatric Inventory
  • CDR Clinical Dementia Rating Scale
  • CDR Clinical Dementia Rating Scale
  • CANTAB Cambridge Neuropsychological Test Automated Battery
  • cognitive function may be measured in various conventional ways known in the art, including using a Morris Water Maze (MWM), Barnes circular maze, elevated radial arm maze, T maze or any other mazes in which the animals use spatial information.
  • MMM Morris Water Maze
  • Cognitive function can be assessed by reversal learning, extradimensional set shifting, conditional discrimination learning and assessments of reward expectancy.
  • Other tests known in the art may also be used to assess cognitive function, such as novel object recognition and odor recognition tasks.
  • Cognitive function may also be measured using imaging techniques such as Positron Emission Tomography (PET), functional magnetic resonance imaging (fMRI), Single Photon Emission Computed Tomography (SPECT), or any other imaging technique that allows one to measure brain function.
  • PET Positron Emission Tomography
  • fMRI functional magnetic resonance imaging
  • SPECT Single Photon Emission Computed Tomography
  • electrophysiological techniques any other imaging technique that allows one to measure brain function.
  • “Promoting” cognitive function refers to affecting impaired cognitive function so that it more closely resembles the function of a normal, unimpaired subject.
  • Cognitive function may be promoted to any detectable degree, but in humans preferably is promoted sufficiently to allow an impaired subject to carry out daily activities of normal life at the same level of proficiency as a normal, unimpaired subject.
  • Preserving cognitive function refers to affecting normal or impaired cognitive function such that it does not decline or does not fall below that observed in the subject upon first presentation or diagnosis, or delays such decline.
  • “Improving” cognitive function includes promoting cognitive function and/or preserving cognitive function in a subject.
  • Cognitive impairment refers to cognitive function in subjects that is not as robust as that expected in a normal, unimpaired subject. In some cases, cognitive function is reduced by about 5%, about 10%, about 30%, or more, compared to cognitive function expected in a normal, unimpaired subject. In other cases, “cognitive impairment” in subjects affected by schizophrenia or bipolar disorder (in particular, mania) refers to cognitive function in subjects that is not as robust as that expected in normal, unimpaired subject.
  • “Schizophrenia” refers to a chronic debilitating disorder, characterized by a spectrum of psychopathology, including positive symptoms such as aberrant or distorted mental representations (e.g. hallucinations, delusions), negative symptoms characterized by diminution of motivation and adaptive goal-directed action (e.g., anhedonia, affective flattening, avolition), and cognitive impairment. While abnormalities in the brain are proposed to underlie the full spectrum of psychopathology in schizophrenia, currently available antipsychotics are largely ineffective in treating cognitive impairments in patients.
  • BP Bipolar disorder
  • manic depressive disorder or “manic depressive illness” refers to a chronic psychological/mood disorder which can be characterized by significant mood changes including periods of depression and euphoric manic periods.
  • BP may be diagnosed by a skilled physician based on personal and medical history, interview consultation and physical examinations.
  • mania or “manic periods” or other variants refers to periods where an individual exhibits some or all of the following characteristics: racing thoughts, rapid speech, elevated levels of activity and agitation as well as an inflated sense of self-esteem, euphoria, poor judgment, insomnia, impaired concentration and aggression.
  • Treating” a condition or patient refers to taking steps to obtain beneficial or desired results, including clinical results.
  • Beneficial or desired clinical results include, but are not limited to, preventing or slowing the progression of the disease or disorder, or alleviation, amelioration, or slowing the progression, of one or more symptoms associated with CNS disorders with cognitive impairment, such as schizophrenia or bipolar disorder (in particular, mania).
  • Treating cognitive impairment refers to taking steps to improve cognitive function in a subject with cognitive impairment so that the subject's performance in one or more cognitive tests is improved to any detectable degree, or is prevented from further decline.
  • that subject's cognitive function after treatment of cognitive impairment, more closely resembles the function of a normal, unimpaired subject.
  • Treatment of cognitive impairment in humans may improve cognitive function to any detectable degree, but is preferably improved sufficiently to allow the impaired subject to carry out daily activities of normal life at the same level of proficiency as a normal, unimpaired subject.
  • “treating cognitive impairment” refers to taking steps to improve cognitive function in a subject with cognitive impairment so that the subject's performance in one or more cognitive tests is improved to any detectable degree, or is prevented from further decline.
  • that subject's cognitive function, after treatment of cognitive impairment more closely resembles the function of a normal, unimpaired subject.
  • “treating cognitive impairment” in a subject affecting by schizophrenia or bipolar disorder (in particular, mania) refers to takings steps to improve cognitive function in the subject so that the subject's cognitive function, after treatment of cognitive impairment, more closely resembles the function of a normal, unimpaired subject.
  • administering or “administration of” a substance, a compound or an agent to a subject can be carried out using one of a variety of methods known to those skilled in the art.
  • a compound or an agent can be administered, intravenously, arterially, intradermally, intramuscularly, intraperitonealy, intravenously, subcutaneously, ocularly, sublingually, orally (by ingestion), intranasally (by inhalation), intraspinally, intracerebrally, and transdermally (by absorption, e.g. through a skin duct).
  • a compound or agent can also appropriately be introduced by rechargeable or biodegradable polymeric devices or other devices, e.g., patches and pumps, or formulations, which provide for the extended, slow, or controlled release of the compound or agent.
  • Administering can also be performed, for example, once, a plurality of times, and/or over one or more extended periods.
  • the administration includes both direct administration, including self-administration, and indirect administration, including the act of prescribing a drug.
  • a physician who instructs a patient to self-administer a drug, or to have the drug administered by another and/or who provides a patient with a prescription for a drug is administering the drug to the patient.
  • a compound or an agent is administered orally, e.g., to a subject by ingestion, or intravenously. e.g., to a subject by injection.
  • the orally administered compound or agent is in an extended release or slow release formulation, or administered using a device for such slow or extended release.
  • SV2A inhibitor refers to any agent, substance or compound that binds to SV2A and reduces synaptic function by reducing pre-synaptic vesicle release (See, e.g., Noyer et al. 1995; Fuks et al. 2003; Lynch et al. 2004; Gillard et al. 2006; Custer et al., 2006; Smedt et al., 2007; Yang et al., 2007; Meehan, “Levetiracetam has an activity-dependent effect on inhibitory transmission,” Epilepsia, 2012 Jan.
  • a substance, or a compound or an agent is an SV2A inhibitor even if it does not itself bind to SV2A, as long as it causes, or affects the ability of, another compound or agent to bind SV2A or reduce synaptic function by reducing pre-synaptic vesicle release.
  • SV2A inhibitors include pharmaceutically acceptable salts of the inhibitors thereof. They also include hydrates, polymorphs, prodrugs, salts, and solvates of these inhibitors.
  • Antipsychotic refers to (1) a typical or an atypical antipsychotic; (2) an agent that is selected from dopaminergic agents, glutamatergic agents, NMDA receptor positive allosteric modulators, glycine reuptake inhibitors, glutamate reuptake inhibitor, metabotropic glutamate receptors (mGluRs) agonists or positive allosteric modulators (PAMs) (e.g., mGluR2/3 agonists or PAMs), glutamate receptor glur5 positive allosteric modulators (PAMs), M1 muscarinic acetylcholine receptor (mAChR) positive allosteric modulators (PAMs), histamine H3 receptor antagonists, AMPA/kainate receptor antagonists, ampakines (CX-516), glutathione prodrugs, noradrenergic agents, serotonin receptor modulators, cholinergic agents, cannabinoid
  • Typical antipsychotics refer to conventional antipsychotics, which produce antipsychotic effects as well as movement related adverse effects related to disturbances in the nigrostriatal dopamine system.
  • extrapyramidal side effects include Parkinsonism, akathisia, tardive dyskinesia and dystonia. See Baldessarini and Tarazi in Goodman & Gilman's The Pharmacological Basis of Therapeutics 10 Edition, 2001, pp. 485-520.
  • “Atypical antipsychotics”, as used herein, refer to antipsychotic drugs that produce antipsychotic effects with little or no EPS and include, but are not limited to, aripiprazole, asenapine, clozapine, iloperidone, olanzapine, lurasidone, paliperidone, quetiapine, risperidone and ziprasidone. “Atypical” antipsychotics differ from conventional antipsychotics in their pharmacological profiles. While conventional antipsychotics are characterized principally by D 2 dopamine receptor blockade, atypical antipsychotics show antagonist effects on multiple receptors including the 5HT a and 5HT c serotonin receptors and varying degrees of receptor affinities.
  • Atypical antipsychotic drugs are commonly referred to as serotoninidopamine antagonists, reflecting the influential hypothesis that greater affinity for the 5-HTT 2 receptor than for the D 2 receptor underlies “atypical” antipsychotic drug action or “second generation” antipsychotic drugs.
  • the atypical antipsychotics often display side effects, including, but not limited to, weight gain, diabetes (e.g., type II diabetes mellitus), hyperlipidemia, QTc interval prolongation, myocarditis, sexual side effects, extrapyramidal side effects and cataract.
  • atypical antipsychotics do not represent a homogeneous class, given their differences in the context of both alleviation of clinical symptoms and their potential for inducing side effects such as the ones listed above.
  • the common side effects of the atypical antipsychotics as described above often limit the antipsychotic doses that can be used for these agents.
  • SV2A inhibitor and the antipsychotic, or their pharmaceutically acceptable salts, hydrates, solvates, or polymorphs are administered with a time separation of no more than about 15 minutes, and in some embodiments no more than about 10 minutes.
  • the SV2A inhibitor and the antipsychotic, or their salts, hydrates, solvates, or polymorphs may be contained in the same dosage (e.g., a unit dosage form comprising both the SV2A inhibitor and the antipsychotic) or in discrete dosages (e.g., the SV2A inhibitor or its salt, hydrate, solvate, or polymorph is contained in one dosage form and the antipsychotic or its salt, hydrate, solvate, or polymorph is contained in another dosage form).
  • sequential administration means that the SV2A inhibitor and the antipsychotic, or their pharmaceutically acceptable salts, hydrates, solvates, polymorphs, are administered with a time separation of more than about 15 minutes, and in some embodiments more than about one hour, or up to 12-24 hours. Either the SV2A inhibitor or the antipsychotic may be administered first.
  • the SV2A inhibitor and the antipsychotic, or their salts, hydrates, solvents, or polymorphs, for sequential administration may be contained in discrete dosage forms, optionally contained in the same container or package.
  • a “therapeutically effective amount” of a drug or agent is an amount of a drug or an agent that, when administered to a subject will have the intended therapeutic effect. e.g. improving cognitive function in a subject in a subject suffering from a disease or disorder (e.g., schizophrenia or bipolar disorder (in particular, mania)), preventing or slowing the progression of a disease or disorder (e.g., schizophrenia or bipolar disorder (in particular, mania)), and/or alleviating, ameliorating, or slowing the progression of one or more symptoms associated with the disease or disorder (e.g., schizophrenia or bipolar disorder (in particular, mania)).
  • a disease or disorder e.g., schizophrenia or bipolar disorder (in particular, mania)
  • preventing or slowing the progression of a disease or disorder e.g., schizophrenia or bipolar disorder (in particular, mania)
  • alleviating, ameliorating, or slowing the progression of one or more symptoms associated with the disease or disorder e.g., schizophrenia or bipolar disorder (in particular,
  • a therapeutically effective amount may be administered in one or more administrations.
  • the precise effective amount needed for a subject will depend upon, for example, the subject's size, health and age, the nature and extent of the cognitive impairment, and the therapeutics or combination of therapeutics selected for administration, and the mode of administration. The skilled worker can readily determine the effective amount for a given situation by routine experimentation.
  • “Subtherapeutic amount” refers to an amount administered of an agent or compound of the invention that is less than the therapeutic amount, that is, less than the amount normally used when said agent or compound is administered alone (i.e., individually and in the absence of other therapeutic agents or compounds) to treat disorders, such as schizophrenia or bipolar disorder (in particular, mania).
  • Analog is used herein to refer to a compound which functionally resembles another chemical entity, but does not share the identical chemical structure.
  • an analog is sufficiently similar to a base or parent compound such that it can substitute for the base compound in therapeutic applications, despite minor structural differences.
  • “Derivative” is used herein to refer to the chemical modification of a compound. Chemical modifications of a compound can include, for example, replacement of hydrogen by an alkyl, acyl, or amino group. Many other modifications are also possible.
  • prodrug is art-recognized and is intended to encompass compounds or agents which, under physiological conditions, are converted into a SV2A inhibitor or an antipsychotic.
  • a common method for making a prodrug is to select moieties which are hydrolyzed or metabolized under physiological conditions to provide the desired compound or agent.
  • the prodrug is converted by, for example, an enzymatic activity of the host animal to a SV2A inhibitor or an antipsychotic.
  • aliphatic as used herein means a straight chained or branched alkyl, alkenyl or alkynyl. It is understood that alkenyl or alkynyl embodiments need at least two carbon atoms in the aliphatic chain. Aliphatic groups typically contains from 1 (or 2) to 12 carbons, such as from 1 (or 2) to 4 carbons.
  • aryl as used herein means a monocyclic or bicyclic carbocyclic aromatic ring system.
  • aryl as used herein can be a C5-C10 monocyclic or C8-C12 bicyclic carbocyclic aromatic ring system.
  • Phenyl is an example of a monocyclic aromatic ring system.
  • Bicyclic aromatic ring systems include systems wherein both rings are aromatic, e.g., naphthyl, and systems wherein only one of the two rings is aromatic, e.g., tetralin.
  • heterocyclic as used herein means a monocyclic or bicyclic non-aromatic ring system having 1 to 3 heteroatom or heteroatom groups in each ring selected from O, N, NH, S, SO, or SO 2 in a chemically stable arrangement.
  • heterocyclic as used herein can be a C5-C10 monocyclic or C8-C12 bicyclic non-aromatic ring system having 1 to 3 heteroatom or heteroatom groups in each ring selected from O, N, NH, S, SO, or SO 2 in a chemically stable arrangement.
  • a bicyclic non-aromatic ring system embodiment of “heterocyclyl” one or both rings may contain said heteroatom or heteroatom groups.
  • one of the two rings may be aromatic.
  • a non-aromatic heterocyclic ring may optionally be fused to an aromatic carbocycle.
  • heterocyclic rings examples include 3-1H-benzimidazol-2-one, 3-(1-alkyl)-benzimidazol-2-one, 2-tetrahydrofuranyl, 3-tetrahydrofuranyl, 2-tetrahydrothiophenyl, 3-tetrahydrothiophenyl, 2-morpholino, 3-morpholino.
  • heteroaryl as used herein means a monocyclic or bicyclic aromatic ring system having 1 to 3 heteroatom or heteroatom groups in each ring selected from O, N, NH or S in a chemically stable arrangement.
  • heteroaryl as used herein can be a C5-C10 monocyclic or C8-C12 bicyclic aromatic ring system having 1 to 3 heteroatom or heteroatom groups in each ring selected from O, N, NH or S in a chemically stable arrangement.
  • heteroaryl as used herein can be a C5-C10 monocyclic or C8-C12 bicyclic aromatic ring system having 1 to 3 heteroatom or heteroatom groups in each ring selected from O, N, NH or S in a chemically stable arrangement.
  • one or both rings may contain said heteroatom or heteroatom groups.
  • heteroaryl rings examples include 2-furanyl, 3-furanyl, N-imidazolyl, 2-imidazolyl, 4-imidazolyl, 5-imidazolyl, benzimidazolyl, 3-isoxazolyl, 4-isoxazolyl, 5-isoxazolyl, 2-oxazolyl, 4-oxazolyl, 5-oxazolyl, N-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl, 2-pyridyl, 3-pyridyl, 4-pyridyl.
  • 2-pyrazolyl isothiazolyl, 1,2,3-oxadiazolyl, 1,2,5-oxadiazolyl, 1,2,4-oxadiazolyl, 1,2,3-triazolyl, 1,2,3-thiadiazolyl, 1,3,4-thiadiazolyl, 1,2,5-thiadiazolyl, purinyl, pyrazinyl, 1,3,5-triazinyl, quinolinyl (e.g., 2-quinolinyl, 3-quinolinyl, 4-quinolinyl), and isoquinolinyl (e.g., 1-isoquinolinyl, 3-isoquinolinyl, or 4-isoquinolinyl).
  • quinolinyl e.g., 2-quinolinyl, 3-quinolinyl, 4-quinolinyl
  • isoquinolinyl e.g., 1-isoquinolinyl, 3-isoquinolinyl, or 4-isoquinoliny
  • cycloalkyl or cycloalkenyl refers to a monocyclic or fused or bridged bicyclic carbocyclic ring system that is not aromatic.
  • cycloalkyl or cycloalkenyl as used herein can be a C5-C10 monocyclic or fused or bridged C8-C12 bicyclic carbocyclic ring system that is not aromatic.
  • Cycloalkenyl rings have one or more units of unsaturation.
  • Preferred cycloalkyl or cycloalkenyl groups include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclohexenyl, cycloheptyl, cycloheptenyl, norbornyl, adamantyl and decalinyl.
  • the carbon atom designations may have the indicated integer and any intervening integer.
  • the number of carbon atoms in a (C1-C4)-alkyl group is 1, 2, 3, or 4. It should be understood that these designation refer to the total number of atoms in the appropriate group.
  • the total number of carbon atoms and heteroatoms is 3 (as in aziridine). 4, 5, 6 (as in morpholine), 7, 8, 9, or 10.
  • “Pharmaceutically acceptable salt” is used herein to refer to an agent or a compound according to the invention that is a therapeutically active, non-toxic base and acid salt form of the compounds.
  • the acid addition salt form of a compound that occurs in its free form as a base can be obtained by treating said free base form with an appropriate acid such as an inorganic acid, for example, a hydrohalic such as hydrochloric or hydrobromic, sulfuric, nitric, phosphoric and the like; or an organic acid, such as, for example, acetic, hydroxyacetic, propanoic, lactic, pyruvic, malonic, succinic, maleic, fumaric, malic, tartaric, citric, methanesulfonic, ethanesulfonic, benzenesulfonic, p-toluenesulfonic, cyclic, salicylic, p-aminosalicylic, pamoic and the like. See, e.g., WO 01/
  • Compounds containing acidic protons may be converted into their therapeutically active, non-toxic base addition salt form, e.g. metal or amine salts, by treatment with appropriate organic and inorganic bases.
  • Appropriate base salt forms include, for example, ammonium salts, alkali and earth alkaline metal salts. e.g., lithium, sodium, potassium, magnesium, calcium salts and the like, salts with organic bases, e.g. N-methyl-D-glucamine, hydrabamine salts, and salts with amino acids such as, for example, arginine, lysine and the like.
  • said salt forms can be converted into the free forms by treatment with an appropriate base or acid.
  • Compounds and their salts can be in the form of a solvate, which is included within the scope of the present invention. Such solvates include for example hydrates, alcoholates and the like. See, e.g., WO 01/062726.
  • hydrate refers to a combination of water with a compound wherein the water retains its molecular state as water and is either absorbed, adsorbed or contained within a crystal lattice of the substrate compound.
  • polymorph refers to different crystalline forms of the same compound and other solid state molecular forms including pseudo-polymorphs, such as hydrates (e.g., bound water present in the crystalline structure) and solvates (e.g., bound solvents other than water) of the same compound.
  • pseudo-polymorphs such as hydrates (e.g., bound water present in the crystalline structure) and solvates (e.g., bound solvents other than water) of the same compound.
  • pseudo-polymorphs such as hydrates (e.g., bound water present in the crystalline structure) and solvates (e.g., bound solvents other than water) of the same compound.
  • hydrates e.g., bound water present in the crystalline structure
  • solvates e.g., bound solvents other than water
  • Crystalline polymorphic forms are of interest to the pharmaceutical industry and especially to those involved in the development of suitable dosage forms. If the polymorphic form is not held constant during clinical or stability studies, the exact dosage form used or studied may not be comparable from one lot to another. It is also desirable to have processes for producing a compound with the selected polymorphic form in high purity when the compound is used in clinical studies or commercial products since Impurities present may produce undesired toxicological effects. Certain polymorphic forms may exhibit enhanced thermodynamic stability or may be more readily manufactured in high purity in large quantities, and thus are more suitable for inclusion in pharmaceutical formulations. Certain polymorphs may display other advantageous physical properties such as lack of hygroscopic tendencies, improved solubility, and enhanced rates of dissolution due to different lattice energies.
  • stereogenic center in their structure.
  • This stereogenic center may be present in a R or a S configuration, said R and S notation is used in correspondence with the rules described in Pure Appl. Chem. (1976), 45, 11-30.
  • the invention also relates to all stereoisomeric forms such as enantiomeric and diastereoisomeric forms of the compounds or mixtures thereof (including all possible mixtures of stereoisomers). See, e.g., WO 01/062726.
  • certain compounds which contain alkenyl groups may exist as Z (zusammen) or E (entussi) isomers.
  • the invention includes both mixture and separate individual isomers.
  • Multiple substituents on a piperidinyl or the azepanyl ring can also stand in either cis or trans relationship to each other with respect to the plane of the piperidinyl or the azepanyl ring.
  • Some of the compounds may also exist in tautomeric forms. Such forms, although not explicitly indicated in the formulae described herein, are intended to be included within the scope of the present invention.
  • the methods of this invention comprise administration of a SV2A inhibitor or a pharmaceutically acceptable salt thereof in combination with administration of an antipsychotic or a pharmaceutically acceptable salt thereof.
  • the agents or compounds of the SV2A inhibitor or the antipsychotic and their pharmaceutically acceptable salts also include hydrates, solvates, polymorphs, and prodrugs of those agents, compounds, and salts.
  • Animal models serve as an important resource for developing and evaluating treatments for CNS disorders with cognitive impairment.
  • Features that characterize cognitive impairment in animal models typically extend to cognitive impairment in humans. Efficacy in such animal models is, thus, expected to be predictive of efficacy in humans.
  • the extent of cognitive impairment in an animal model for a CNS disorder, and the efficacy of a method of treatment for said CNS disorder may be tested and confirmed with the use of a variety of cognitive tests.
  • a Radial Arm Maze (RAM) behavioral task is one example of a cognitive test, specifically testing spacial memory (Chappell et al. Neuropharmacology 37: 481-487, 1998).
  • the RAM apparatus consists of, e.g., eight equidistantly spaced arms. A maze arm projects from each facet of a center platform. A food well is located at the distal end of each arm. Food is used as a reward. Blocks can be positioned to prevent entry to any arm. Numerous extra maze cues surrounding the apparatus may also be provided. After habituation and training phases, spatial memory of the subjects may be tested in the RAM under control or test compound-treated conditions.
  • subjects are pretreated before trials with a vehicle control or one of a range of dosages of the test compound.
  • a subset of the arms of the eight-arm maze is blocked.
  • Subjects are allowed to obtain food on the unblocked arms to which access is permitted during this initial “information phase” of the trial.
  • Subjects are then removed from the maze for a delay period, e.g., a 60 second delay, a 15 minute delay, a one-hour delay, a two-hour delay, a six hour delay, a 24 hour delay, or longer) between the information phase and the subsequent “retention test,” during which the barriers on the maze are removed, thus allowing access to all eight arms.
  • a cognitive test that may be used to assess the effects of a test compound on the cognitive impairment of a CNS disorder model animal is the Morris water maze.
  • a water maze is a pool surrounded with a novel set of patterns relative to the maze.
  • the training protocol for the water maze may be based on a modified water maze task that has been shown to be hippocampal-dependent (de Hoz et al., Eur. J. Neurosci., 22:745-54, 2005; Steele and Morris, Hippocampus 9:118-36, 1999).
  • the subject is trained to locate a submerged escape platform hidden underneath the surface of the pool.
  • a subject is released in the maze (pool) from random starting positions around the perimeter of the pool.
  • the starting position varies from trial to trial. If the subject does not locate the escape platform within a set time, the experimenter guides and places the subject on the platform to “teach” the location of the platform. After a delay period following the last training trial, a retention test in the absence of the escape platform is given to assess spatial memory.
  • the subject's level of preference for the location of the (now absent) escape platform as measured by, e.g., the time spent in that location or the number of crossings of that location made by the mouse, indicates better spatial memory, i.e., treatment of cognitive impairment.
  • the preference for the location of the escape platform under different treatment conditions can then be compared for efficacy of the test compound in treating CNS disorders with cognitive impairment.
  • This invention provides methods and compositions for treating schizophrenia or bipolar disorder (in particular, mania) using a SV2A inhibitor or a pharmaceutically acceptable salt thereof in combination with an antipsychotic or a pharmaceutically acceptable salt thereof.
  • treatment comprises preventing or slowing the progression of schizophrenia or bipolar disorder (in particular, mania).
  • Schizophrenia is characterized by a wide spectrum of psychopathology, including positive symptoms such as aberrant or distorted mental representations (e.g., hallucinations, delusions), negative symptoms characterized by diminution of motivation and adaptive goal-directed action (e.g., anhedonia, affective flattening, avolition), and cognitive impairment.
  • treatment comprises alleviation, amelioration or slowing the progression of one or more positive and/or negative symptoms, as well as cognitive impairment, associated with schizophrenia.
  • psychiatric diseases such as schizotypical and schizoaffective disorder, other acute- and chronic psychoses and bipolar disorder (in particular, mania), which have an overlapping symptomatology with schizophrenia.
  • treatment comprises alleviation, amelioration or slowing the progression of one or more symptoms, as well as cognitive impairment, associated with bipolar disorder (in particular, mania).
  • the methods and compositions may be used for human patients in clinical applications in treating schizophrenia or bipolar disorder (in particular, mania).
  • the dose of the composition and dosage interval for the method is, as described herein, one that is safe and efficacious in those applications.
  • Cognitive impairments are associated with schizophrenia. They precede the onset of psychosis and are present in non-affected relatives. The cognitive impairments associated with schizophrenia constitute a good predictor for functional outcome and are a core feature of the disorder. Cognitive features in schizophrenia reflect dysfunction in frontal cortical and hippocampal circuits. Patients with schizophrenia also present hippocampal pathologies such as reductions in hippocampal volume, reductions in neuronal size and dysfunctional hyperactivity. An imbalance in excitation and inhibition in these brain regions has also been documented in schizophrenic patients suggesting that drugs targeting inhibitory mechanisms could be therapeutic. See, e.g., Guidotti et al., Psychopharmacology 180: 191-205, 2005; Zierhut. Psych. Res. Neuroimag.
  • Animal models serve as an important resource for developing and evaluating treatments for schizophrenia.
  • Features that characterize schizophrenia in animal models typically extend to schizophrenia in humans.
  • efficacy in such animal models is expected to be predictive of efficacy in humans.
  • Various animal models of schizophrenia are known in the art.
  • Methionine-treated mice exhibit deficient expression of GAD67 in frontal cortex and hippocampus, similar to those reported in the brain of postmortem schizophrenia patients. They also exhibit prepulse inhibition of startle and social interaction deficits (Tremonlizzo et al., PNAS, 99: 17095-17100, 2002).
  • Another animal model of schizophrenia is methylaoxymethanol acetate (MAM)-treatment in rats. Pregnant female rats are administered MAM (20 mg/kg, intraperitoneal) on gestational day 17. MAM-treatment recapitulate a pathodevelopmental process to schizophrenia-like phenotypes in the offspring, including anatomical changes, behavioral deficits and altered neuronal information processing.
  • MAM-treated rats display a decreased density of parvalbumin-positive GABAergic interneurons in portions of the prefrontal cortex and hippocampus.
  • MAM-treated rats display reduced latent inhibition.
  • Latent inhibition is a behavioral phenomenon where there is reduced learning about a stimulus to which there has been prior exposure with any consequence. This tendency to disregard previously benign stimuli, and reduce the formation of association with such stimuli is believed to prevent sensory overload. Low latent inhibition is indicative of psychosis.
  • Latent inhibition may be tested in rats in the following manner. Rats are divided into two groups. One group is pre-exposed to a tone over multiple trials. The other group has no tone presentation.
  • Both groups are then exposed to an auditory fear conditioning procedure, in which the same tone is presented concurrently with a noxious stimulus, e.g. an electric shock to the foot. Subsequently, both groups are presented with the tone, and the rats' change in locomotor activity during tone presentation is monitored. After the fear conditioning the rats respond to the tone presentation by strongly reducing locomotor activity. However, the group that has been exposed to the tone before the conditioning period displays robust latent inhibition: the suppression of locomotor activity in response to tone presentation is reduced. MAM-treated rats, by contrast show impaired latent inhibition. That is, exposure to the tone previous to the fear conditioning procedure has no significant effect in suppressing the fear conditioning. (see Lodge et al., J. Neurosci., 29:2344-2354, 2009) Such animal models of schizophrenia may be used to assay the effectiveness of the methods and compositions of the invention in treating schizophrenia or bipolar disorder (in particular, mania).
  • a noxious stimulus e.g. an electric shock to the foot.
  • MAM-treated rats display a significantly enhanced locomotor response (or aberrant locomotor activity) to low dose D-amphetamine administration.
  • the MAM-treated rats also display a significantly greater number of spontaneously firing ventral tegmental dopamine (DA) neurons.
  • DA ventral tegmental dopamine
  • MAM-treated rats in the above study may be suitable for use to assay the effectiveness of the methods and compositions of the present invention in treating schizophrenia or bipolar disorder (in particular, mania).
  • the methods and compositions of this invention maybe evaluated, using MAM-treated animals, for their effects on the central hippocampus (vHipp) regulation, on the elevated DA neuron population activity and on the hyperactive locomotor response to amphetamine in the MAM-treated animals.
  • vHipp central hippocampus
  • HPC hippocampal
  • PAM benzodiazepine-positive allosteric modulator
  • the ⁇ 5GABAAR PAM reduces the number of spontaneously active DA neurons in the ventral tegmental area (VTA) of MAM rats to levels observed in saline-treated rats (control group), both when administered systemically and when directly infused into the ventral HPC. Moreover, HPC neurons in both saline-treated and MAM-treated animals show diminished cortical-evoked responses following the ⁇ 5GABAAR PAM treatment. In addition, the increased locomotor response to amphetamine observed in MAM-treated rats is reduced following the ⁇ 5GABA A R PAM treatment. See Gill K. M et al. Neuropsychopharmacology (2011), 1-9.
  • MAM-treated rats in the above study may be suitable for use in the present invention to assay the effectiveness of the methods and compositions of the invention in treating schizophrenia or bipolar disorder (in particular, mania).
  • the methods and compositions of this invention maybe evaluated, using MAM-treated animals, for their effects on the output of the hippocampal (HPC) and on the hyperactive locomotor response to amphetamine in the MAM-treated animals.
  • HPC hippocampal
  • Apomorphine-induced climbing (AIC) and stereotype (AIS) in mice is another animal model useful in this invention.
  • Agents are administered to mice at a desired dose level (e.g., via intraperitoneal administration).
  • a desired dose level e.g., via intraperitoneal administration.
  • experimental mice are challenges with apomorphine (e.g., with 1 mg/kg sc).
  • apomorphine e.g., with 1 mg/kg sc
  • the sniffing-licking-gnawing syndrome stereotyped behavior
  • climbing behavior induced by apomorphine are scored and recorded for each animal. Readings can be repeated every 5 min during a 30-min test session. Scores for each animal are totaled over the 30-min test session for each syndrome (stereotyped behavior and climbing).
  • the efficacy of the methods and compositions of this invention in treating schizophrenia may also be assessed in animal models of schizophrenia or bipolar disorder (in particular, mania), as well as human subjects with schizophrenia, using a variety of cognitive tests known in the art, as discussed above.
  • SV2A inhibitors are also be assessed in animal models of schizophrenia or bipolar disorder (in particular, mania), as well as human subjects with schizophrenia, using a variety of cognitive tests known in the art, as discussed above.
  • SV2A synaptic vesicle protein-2
  • SV2B synaptic vesicle protein-2
  • SV2C synaptic vesicle protein-2
  • the proteins are integral membrane proteins and have a low-level homology (20-30%) to the twelve transmembrane family of bacterial and fungal transporter proteins that transport sugar, citrate, and xenobiotics (Bajjalieh et al., Science. 257: 1271-1273. (1992)).
  • SV2 family proteins are present in the brain and endocrine cells, and further are present in all synaptic and endocrine vesicles.
  • SV2 proteins are reported to play a role in normal synaptic function, and functions in a maturation step of primed vesicles that converts the vesicles into a Cat( 2+ )- and synaptotagmin-responsive state (Sudhof et al., 2009). Functionally, SV2 proteins are reported to enhance synaptic currents and increase the probability of transmitter release by maintaining the size of the readily releasable pool of vesicles (Custer et al., 2006).
  • SV2A inhibitor refers to any agent, substance or compound that binds to SV2A and reduces synaptic function by reducing pre-synaptic vesicle release (See, e.g., Noyer et al. 1995; Fuks et al. 2003; Lynch et al. 2004; Gillard et al. 2006; Custer et al., 2006; Smedt et al., 2007; Yang et al., 2007; Meehan, “Levetiracetam has an activity-dependent effect on inhibitory transmission,” Epilepsia, 2012 Jan.
  • a substance, or a compound or an agent is an SV2A inhibitor even if it does not itself bind to SV2A, as long as it causes, or affects the ability of, another compound or agent to bind SV2A or reduce synaptic function by reducing pre-synaptic vesicle release.
  • SV2A inhibitors include pharmaceutically acceptable salts of the inhibitors thereof. They also include hydrates, polymorphs, prodrugs, salts, and solvates of these inhibitors.
  • SV2A inhibitors or pharmaceutically acceptable salts, hydrates, solvates and polymorphs thereof that are useful in the methods and compositions of this invention are those disclosed, for example, U.S. patent application Ser. No. 12/580,464, International Patent Application PCT/US2009/005647, U.S. Patent Application 61/105,847, U.S. Patent Application 61/152,631, and U.S. Patent Application 61/175,536.
  • any SV2A inhibitor or a pharmaceutically acceptable salt, hydrate, solvate or polymorph thereof may be used in the methods and compositions of the invention.
  • the SV2A inhibitor is selected from the group of SV2A inhibitors referred to in International Patent Applications WO2010/144712; WO2010/002869; WO2008/132139; WO2007/065595; WO2006/128693; WO2006/128692; WO2005/054188; WO2004/087658; WO2002/094787; WO2001/062726; U.S. Pat. Nos. 7,465,549; 7,244,747; 5,334,720; 4,696,943; 4,696,942; U.S.
  • Other SV2A inhibitors may also be used in this invention.
  • Applicants also refer to methods of preparing these compounds found in the documents cited above.
  • Other synthetic methods may also be used. These methods are well known to those skilled in the art.
  • the SV2A inhibitor is selected from the group consisting of levetiracetam, brivaracetam, and seletracetam or derivatives or analogs or pharmaceutically acceptable salts, solvates, hydrates, polymorphs, or prodrugs thereof.
  • the SV2A inhibitor is levetiracetam or salts, solvates, hydrates, polymorphs or prodrugs thereof.
  • Levetiracetam refers to the International Union of Pure and Applied Chemistry (IUPAC) name of the compound (2S)-2-(2-oxopyrrolidin-1-yl) butanamide).
  • Levetiracetam is a widely used antiepileptic drug.
  • Levetiracetam binds to a specific site in the CNS: the synaptic vesicle protein 2A (SV2A) (See. e.g., Noyer et al. 1995; Fuks et al. 2003; Lynch et al. 2004; Gillard et al. 2006) and has further been shown to directly inhibit synaptic activity and neurotransmission by inhibiting presynaptic neurotransmitter release (Yang et al. 2007).
  • SV2A synaptic vesicle protein 2A
  • SV2A inhibitors useful for the methods and compositions of this invention are the following:
  • X is —CA 1 NR 5 R 6 or —CA 1 OR 7 or —CA 1 -R 8 or CN;
  • a 1 and A 2 are independently oxygen, sulfur or —NR 9 ;
  • R 1 is hydrogen, alkyl, aryl or —CH 2 —R 1a wherein R 1a is aryl, heterocycle, halogen, hydroxy, amino, nitro or cyano;
  • R 2 , R 3 and R 4 are the same or different and each is independently hydrogen, halogen, hydroxy, thiol, amino, nitro, nitrooxy, cyano, azido, carboxy, amido, sulfonic acid, sulfonamide, alkyl, alkenyl, alkynyl, ester, ether, aryl, heterocycle, or an oxy derivative, thio derivative, amino derivative, acyl derivative, sulfonyl derivative or sulfinyl derivative:
  • R 2a , R 3a and R 4a are the same or different and each is independently hydrogen, halogen, alkyl, alkenyl, alkynyl or aryl;
  • R 8 is hydrogen, hydroxy, thiol, halogen, alkyl, aryl, heterocycle or a thio derivative
  • R 2 , R 3 , R 4 , R 2 , R 3a and R 4a is other than hydrogen; and that when the compound is a mixture of all possible isomers, X is —CONR 5 R 6 , A 2 is oxygen and R 1 is hydrogen, methyl, ethyl or propyl then substitution on the pyrollidine ring is other than mono-, di-, or tri-methyl or mono-ethyl; and that when R 1 , R 2 , R 4 , R 2a , R 3a and R 4a are each hydrogen, A2 is oxygen and X is CONR 5 R 6 then R 3 is different from carboxy, ester, amido, substituted oxo-pyrrolidine, hydroxy, oxy derivative, amino, amino derivatives, methyl, naphthyl, phenyl optionally substituted by oxy derivatives or in the para position by an halogen atom.
  • R 11 and R 12 are the same or different and each is independently amido, alkyl, alkenyl, alkynyl, acyl, ester, ether, aryl, aralkyl, heterocycle or an oxy derivative, thio derivative, acyl derivative, amino derivative, sulfonyl derivative, or sulfinyl derivative, each optionally substituted with any suitable group, including, but not limited to, one or more moieties selected from lower alkyl or other groups as described below as substituents for alkyl.
  • oxy derivative is defined as including —O—R 11 groups wherein R 11 is as defined above except for “oxy derivative”.
  • Non-limiting examples are alkoxy, alkenyloxy, alkynyloxy, acyloxy, oxyester, oxyamido, alkylsulfonyloxy, alkylsulfinyloxy, arylsulfonyloxy, arylsulfinyloxy, aryloxy, aralkoxy or heterocyclooxy such as pentyloxy, allyloxy, methoxy, ethoxy, phenoxy, benzyloxy, 2-naphthyloxy, 2-pyridyloxy, methylenedioxy, carbonate.
  • thio derivative as used herein, is defined as including —S—R 11 groups wherein R 11 is as defined above except for “thio derivative”.
  • Non-limiting examples are alkylthio, alkenylthio, alkynylthio and arylthio.
  • amino derivative as used herein, is defined as including —NHR 11 or —NR 11 R 12 groups wherein R 11 and R 12 are as defined above.
  • Non-limiting examples are mono- or di-alkyl-, alkenyl-, alkynyl- and arylamino or mixed amino.
  • acyl derivative represents a radical derived from carboxylic acid and thus is defined as including groups of the formula R 11 —CO—, wherein R 11 is as defined above and may also be hydrogen.
  • Non-limiting examples are formyl, acetyl, propionyl, isobutyryl, valeryl, lauroyl, heptanedioyl, cyclohexanecarbonyl, crotonoyl, fumaroyl, acryloyl, benzoyl, naphthoyl, furoyl, nicotinoyl, 4-carboxybutanoyl, oxalyl, ethoxalyl, cysteinyl, oxamoyl.
  • sulfonyl derivative as used herein, is defined as including a group of the formula —SO 2 —R 11 , wherein R 11 is as defined above except for “sulfonyl derivative”.
  • Non-limiting examples are alkylsulfonyl, alkenylsulfonyl, alkynylsulfonyl and arylsulfonyl.
  • sulfinyl derivative as used herein, is defined as including a group of the formula —SO—R 11 , wherein R 11 is as defined above except for “sulfinyl derivative”.
  • Non-limiting examples are alkylsulfinyl, alkenylsulfinyl, alkynylsulfinyl and arylsulfinyl.
  • alkyl is defined as including saturated, monovalent hydrocarbon radicals having straight, branched or cyclic moieties or combinations thereof and containing 1-20 carbon atoms, preferably 1-6 carbon atoms for non-cyclic alkyl and 3-6 carbon atoms for cycloalkyl (in these two preferred cases, unless otherwise specified, “lower alkyl”).
  • Alkyl moieties may optionally be substituted by 1 to 5 substituents independently selected from the group consisting of halogen, hydroxy, thiol, amino, nitro, cyano, thiocyanato, acyl, acyloxy, sulfonyl derivative, sulfinyl derivative, alkylamino, carboxy, ester, ether, amido, azido, cycloalkyl, sulfonic acid, sulfonamide, thio derivative, oxyester, oxyamido, heterocycle, vinyl, C1-5-alkoxy, C6-10-aryloxy and C6-10-aryl.
  • substituents independently selected from the group consisting of halogen, hydroxy, thiol, amino, nitro, cyano, thiocyanato, acyl, acyloxy, sulfonyl derivative, sulfinyl derivative, alkylamino, carboxy, ester, ether, amido
  • Preferred alkyl groups are methyl, ethyl, propyl, isopropyl, butyl, iso or ter-butyl, and 2,2,2-trimethylethyl each optionally substituted by at least one substituent selected from the group consisting of halogen, hydroxy, thiol, amino, nitro and cyano, such as trifluoromethyl, trichloromethyl, 2,2,2-trichloroethyl, 1,1-dimethyl-2,2-dibromoethyl, 1,1-dimethyl-2,2,2-trichloroethyl.
  • alkyl, alkenyl and alkynyl represent straight- or branched chains, C1-12, preferably C1-4-alkylene or C2-12-, preferably C2-4-alkenylene or -alkynylene moieties respectively.
  • branched derivatives are conventionally qualified by prefixes such as “n”, “sec”, “iso” and the like (e.g., “n-propyl”, “sec-butyl”) are in the n-form unless otherwise stated.
  • aryl as used herein, is defined as including an organic radical derived from an aromatic hydrocarbon consisting of 1-3 rings and containing 6-30 carbon atoms by removal of one hydrogen, such as phenyl and naphthyl each optionally substituted by 1 to 5 substituents independently selected from halogen, hydroxy, thiol, amino, nitro, cyano, acyl, acyloxy, sulfonyl, sulfinyl, alkylamino, carboxy, ester, ether, amido, azido, sulfonic acid, sulfonamide, alkylsulfonyl, alkylsulfinyl, alkylthio, oxyester, oxyamido, aryl, C1-6-alkoxy, C6-10-aryloxy, C1-6-alkyl, C1-6-haloalkyl.
  • Aryl radicals are preferably monocyclic containing 6-10 carbon atoms.
  • Preferred aryl groups are phenyl and naphthyl each optionally substituted by 1 to 5 substituents independently selected from halogen, nitro, amino, azido, C1-6-alkoxy, C1-6-alkylthio, C1-6-alkyl, C1-6-haloalkyl and phenyl.
  • halogen includes an atom of Cl, Br, F, I.
  • hydroxy represents a group of the formula —OH.
  • thiol represents a group of the formula —SH.
  • cyano represents a group of the formula —CN.
  • nitro represents a group of the formula —NO 2 .
  • nitrooxy represents a group of the formula —ONO 2 .
  • amino represents a group of the formula —NH 2 .
  • azido represents a group of the formula —N 3 .
  • sulfonic acid represents a group of the formula —SO 3 H.
  • sulfonamide represents a group of the formula —SO 2 NH 2 .
  • esters as used herein is defined as including a group of formula —COO—R 11 wherein R 11 is as defined above except oxy derivative, thio derivative or amino derivative.
  • ether is defined as including a group selected from C1-50-straight or branched alkyl, or C2-50-straight or branched alkenyl or alkynyl groups or a combination of the same, interrupted by one or more oxygen atoms.
  • heterocycle as used herein is defined as including an aromatic or non aromatic cyclic alkyl, alkenyl, or alkynyl moiety as defined above, having at least one O, S and/or N atom interrupting the carbocyclic ring structure and optionally, one of the carbon of the carbocyclic ring structure may be replaced by a carbonyl.
  • Non-limiting examples of aromatic heterocycles are pyridyl, furyl, pyrrolyl, thienyl, isothiazolyl, imidazolyl, benzimidazolyl, tetrazolyl, quinazolinyl, quinolizinyl, naphthyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl, quinolyl, isoquinolyl, isobenzofuranyl, benzothienyl, pyrazolyl, indolyl, indolizinyl, purinyl, isoindolyl, carbazolyl, thiazolyl, 1,2,4-thiadiazolyl, thieno (2,3-b) furanyl, furopyranyl, benzofuranyl, benzoxepinyl, isooxazolyl, oxazolyl, thianthrenyl, benzothiazolyl, or benzox
  • Non-limiting examples of non aromatic heterocycles are tetrahydrofuranyl, tetrahydropyranyl, piperidinyl, piperidyl, piperazinyl, imidazolidinyl, morpholino, morpholinyl, 1-oxaspiro (4.5) dec-2-yl, pyrrolidinyl, 2-oxo-pyrrolidinyl, sugar moieties (i.e. glucose, pentose, hexose, ribose, fructose, which may also be substituted) or the same which can optionally be substituted with any suitable group, including but not limited to one or more moieties selected from lower alkyl, or other groups as described above for the alkyl groups.
  • heterocycle also includes bicyclic, tricyclic and tetracyclic, spiro groups in which any of the above heterocyclic rings is fused to one or two rings independently selected from an aryl ring, a cyclohexane ring, a cyclohexene ring, a cyclopentane ring, a cyclopentene ring or another monocyclic heterocyclic ring or where a monocyclic heterocyclic group is bridged by an alkylene group, such as quinuclidinyl, 7-azabicyclo (2.2.1)heptanyl, 7- oxabicyclo (2.2.1) heptanyl, 8-azabicyclo (3.2.1)octanyl.
  • alkylene group such as quinuclidinyl, 7-azabicyclo (2.2.1)heptanyl, 7- oxabicyclo (2.2.1) heptanyl, 8-azabicyclo (3.2.1)octanyl.
  • X are —COO R 7 or —CONR 5 R 6 , wherein R 5 , R 6 and R 1 are preferably hydrogen, C1-4-alkyl, phenyl or alkylphenyl.
  • X is carboxy or —CONR 5 R 6 , wherein R 5 and R 6 are preferably hydrogen, C1-4-alkyl, phenyl or alkylphenyl, especially —CONH 2 .
  • a 1 and A 2 are each oxygen.
  • R 1 is hydrogen, alkyl, especially C1-12 alkyl, particularly lower alkyl or aryl especially phenyl.
  • R 1 groups are methyl, ethyl, propyl, isopropyl, butyl, iso- or ter-butyl.
  • 2,2,2-trimethylethyl each optionally attached via a methylene bridge or the same substituted by at least one halogen atom such as trifluoromethyl, trichloromethyl, 2,2,2-trichloroethyl, 1,1-dimethyl-2,2-dibromoethyl, 1,1-dimethyl-2,2,2-trichloroethyl.
  • R 1 as ethyl is especially preferred.
  • R 2 and R 2a are independently hydrogen, halogen or alkyl, especially lower alkyl.
  • R 1 and R 2a groups are independently hydrogen, halogen or methyl, ethyl, propyl, isopropyl, butyl, iso or ter-butyl, 2,2,2-trimethylethyl or the same substituted by at least one halogen atom such as trifluoromethyl, trichloromethyl, 2,2,2-trichloroethyl. 1,1-dimethyl-2,2-dibromoethyl, 1,1-dimethyl-2,2,2-trichloroethyl.
  • R 2 and R 2a are hydrogen.
  • R 1a , R 4 and R 4a are independently hydrogen, alkyl, especially methyl or ethyl or aryl especially phenyl or aralkyl, especially benzyl.
  • R 3a , R 4 and R 4a groups are independently hydrogen, halogen or methyl, ethyl, propyl, isopropyl, butyl, iso or ter-butyl, 2,2,2-trimethylethyl or the same substituted by at least one halogen atom such as trifluoromethyl, trichloromethyl, 2,2,2-trichloroethyl. 1,1-dimethyl-2,2-dibromoethyl, 1,1-dimethyl-2,2,2-trichloroethyl.
  • R 4 and R 4a are hydrogen.
  • R 3a is particularly hydrogen or alkyl, especially lower alkyl and is most preferably hydrogen.
  • R 3 is hydrogen, C1-12-alkyl, especially C1-6-alkyl, each optionally substituted by one or more substituents selected from hydroxy, halogen, cyano, thiocyanato or alkoxy and attached to the ring either directly or via a thio, sulfinyl, sulfonyl, carbonyl or oxycarbonyl group and optionally, a C1-4-alkylene bridge, particularly methylene; C2-6-alkenyl or -alkynyl, especially C2-3-alkenyl or -alkynyl each optionally substituted by one or more halogens; azido; cyano; amido: carboxy; triazolyl, tetrazolyl, pyrrolidinyl, pyridyl, 1-oxidopyridyl, thiomorpholinyl, benzodioxolyl, furyl, oxazolyl, pyrimidinyl,
  • R 3 is C1-6-alkyl optionally substituted by one or more substituents selected from halogen, thiocyanato, azido, alkoxy, alkylthio, phenylsulfonyl; nitrooxy; C2-3-alkenyl or -alkynyl each optionally substituted by one or more halogens or by acetyl; tetrazolyl, pyridyl, furyl, pyrrolyl, thiazolyl or thienyl; or phenyl or phenylalkyl each optionally substituted by one or more substituents selected from halogen, C1-6-alkyl, C1-6 haloalkyl, C1-6-alkoxy, amino, azido, phenyl and nitro and each attached to the ring either directly or via a sulfonyloxy and optionally additionally a C1-4-alkylene bridge, particularly methylene.
  • substituents selected from halogen,
  • R 3 groups are hydrogen, halogen or methyl, ethyl, propyl, isopropyl, butyl, iso or ter-butyl, 2,2,2-trimethylethyl or the same substituted by at least one halogen atom such as trifluoromethyl, trichloromethyl, 2,2,2-trichloroethyl, 1,1-dimethyl-2,2-dibromoethyl, 1,1-dimethyl-2,2,2-trichloroethyl.
  • R 3 is especially C1-4-alkyl optionally substituted by one or more substituents selected from halogen, thiocyanato or azido; C2-5-alkenyl or -alkynyl, each optionally substituted by one or more halogens; thienyl; or phenyl optionally substituted by one or more substituents selected from halogen, C1-6-alkyl, C1-6 haloalkyl or azido.
  • R 3 groups are C1-6 alkyl and C2-6 haloalkenyl.
  • R 5 and R 6 are independently hydrogen, methyl, ethyl, propyl, isopropyl, butyl, iso or ter-butyl, 2,2,2-trimethylethyl, especially hydrogen or methyl.
  • R 5 and R 6 are hydrogen.
  • R 7 is hydrogen, methyl, ethyl, propyl, isopropyl, butyl, iso or tert-butyl, 2,2,2-trimethylethyl, methoxy, ethoxy, phenyl, benzyl or the same substituted by at least one halogen atom such as trifluoromethyl, chlorophenyl.
  • R 7 is hydrogen, methyl or ethyl especially hydrogen.
  • R 8 is hydrogen, methyl, ethyl, propyl, isopropyl, butyl, iso or ter-butyl. 2,2,2-trimethylethyl, phenyl, benzyl or the same substituted by at least one halogen atom such as trifluoromethyl, chlorobenzyl.
  • R S is hydrogen or methyl.
  • Combinations of one or more of these preferred compound groups are especially preferred.
  • a particular group of compounds of formula I comprises those wherein,
  • a 2 is oxygen
  • X is —CONR 5 R 6 or —COOR 7 or —CO—R 8 or CN;
  • R 1 is hydrogen or alkyl, aryl, halogen, hydroxy, amino, nitro, cyano;
  • R 2 , R 3 , R 4 are the same or different and each is independently hydrogen or halogen, hydroxy, amino, nitro, cyano, acyl, acyloxy, a sulfonyl derivative, a sulfinyl derivative, an amino derivative, carboxy, ester, ether, amido, sulfonic acid, sulfonamide, alkoxycarbonyl, a thio derivative, alkyl, alkoxy, oxyester, oxyamido, aryl, an oxy derivative, heterocycle, vinyl and R 3 may additionally represent C2-5 alkenyl, C2-5 alkynyl or azido each optionally substituted by one or more halogen, cyano, thiocyano, azido, cyclopropyl, acyl and/or phenyl; or phenylsulfonyloxy whereby any phenyl moiety may be substituted by one or more halogen, alkyl, acy
  • R 2a , R 3a and R 4a are hydrogen
  • R 4 , R 6 , R 7 are the same or different and each is independently hydrogen, hydroxy, alkyl, aryl, heterocycle or oxy derivative;
  • R 8 is hydrogen, hydroxy, thiol, halogen, alkyl, aryl, heterocycle, alkylthio or thio derivative.
  • R 1 is preferably methyl, ethyl, propyl, isopropyl, butyl, or isobutyl; most preferably methyl, ethyl or n-propyl.
  • R 2 and R 4 are preferably independently hydrogen or halogen or methyl, ethyl, propyl, isopropyl, butyl, isobutyl; and, most preferably, are each hydrogen.
  • R 3 is preferably C1-5 alkyl, C2-5 alkenyl, C2-C5 alkynyl, cyclopropyl, azido, each optionally substituted by one or more halogen, cyano, thiocyano, azido, alkylthio, cyclopropyl, acyl and/or phenyl; phenyl; phenylsulfonyl; phenylsulfonyloxy, tetrazole, thiazole, thienyl, furyl, pyrrole, pyridine, whereby any phenyl moiety may be substituted by one or more halogen, alkyl, haloalkyl, alkoxy, nitro, amino, and/or phenyl; most preferably methyl, ethyl, propyl, isopropyl, butyl, or isobutyl.
  • X is preferably —COOH or —COOMe or —COOEt or —CONH 2 ; most preferably —CONH 2 .
  • a further particular group of compounds of formula I comprises those wherein,
  • X is —CA 1 NH 2 ,—CA 1 NHCH 3 or —CA 1 N(CH 3 ) 2 ;
  • R 1 is alkyl or phenyl
  • R 3 is alkyl, alkenyl, alkynyl, cyano, isothiocyanato, ether, carboxyl, amido, aryl, heterocycle; or
  • R 3 is CH 2 R 10 wherein R 10 is hydrogen, cycloalkyl, oxyester, oxyalkylsulfonyl, oxyarylsulfonyl, aminoalkylsulfonyl, aminoarylsulfonyl, nitrooxy, cyano, isothiocyanato, azido, alkylthio, arylthio, alkylsulfinyl, alkylsulfonyl, heterocycle, aryloxy, alkoxy or trifluoroethyl;
  • R 3a is hydrogen, alkyl or aryl (especially with the proviso that when R 3a is hydrogen, R 1 other than methyl);
  • R 3 R 3a form a cycloalkyl
  • R 2 , R 2a , R 4 and R 4a are each hydrogen.
  • R 1 is preferably alkyl especially C1-12- more particularly C1-6-alkyl and is most preferably ethyl;
  • R 2 , R 2a , R 3a and R 4a are preferably hydrogen
  • R 3 is preferably selected from hydrogen; C1-12-alkyl, especially C1-6-alkyl, each optionally substituted by one or more substituents selected from hydroxy, halogen, cyano, thiocyanato or alkoxy and attached to the ring either directly or via a thio, sulfinyl, sulfonyl, carbonyl or oxycarbonyl group and optionally additionally a C1-4-alkylene bridge, particularly methylene; C2-6-alkenyl or -alkynyl, especially C2-3-alkenyl or -alkynyl, each optionally substituted by one or more halogens; azido; cyano; amido; carboxy; triazolyl, tetrazolyl, pyrrolidinyl, pyridyl, 1-oxidopyridyl, thiomorpholinyl, benzodioxolyl, furyl, oxazolyl, pyrimidiny
  • R 3a is preferably hydrogen or C1-4-alkyl
  • R 4 and R 4a are preferably, independently hydrogen, C1-4-alkyl, phenyl or benzyl.
  • a further group of compounds of formula I comprises those in racemic form wherein, when X is —CONR 5 R 6 and R 1 is hydrogen, methyl, ethyl or propyl, then substitution on the pyrrolidine ring is other than mono-, di-, or tri-methyl or mono-ethyl.
  • a further group of compound of formula I comprises those in racemic form wherein, when X is —CONR 5 R 6 and R 1 is hydrogen or C1-6-alkyl, C2-6-alkenyl or -alkynyl or cycloalkyl, each unsubstituted, then substitution in the ring is other than by alkyl, alkenyl or alkynyl, each unsubstituted.
  • a further particular group of compounds of formula I comprises those wherein,
  • X is —CA 1 NH 2 ;
  • R 1 is H
  • R 3 is azidomethyl, iodomethyl, ethyl optionally substituted by 1 to 5 halogen atoms, n-propyl optionally substituted by 1 to 5 halogen atoms, vinyl optionally substituted by one or two methyl, and/or 1 to 3 halogen atoms, acetylene optionally substituted by C1-4-alkyl, phenyl or halogen;
  • R 3a is hydrogen or halogen, preferably fluorine
  • R 2 , R 2a , R 4 and R 4a are each hydrogen;
  • a further particular group of compounds of formula I comprises those wherein,
  • X is —CA 1 NH 2 ;
  • R 1 is H
  • R 3 is C1-6-alkyl, C2-6-alkenyl or C2-6-alkynyl optionally substituted by azido, oxynitro, 1 to 6 halogen atoms;
  • R 3a is hydrogen or halogen, preferably fluorine
  • R 1 , R 2 , R 4 and R 4a are each hydrogen; as their racemates or in enantiomerically enriched form, preferably the pure enantiomers.
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of:
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of:
  • a 1 represents an oxygen or a sulfur atom
  • X is —CONR 17 R 8 , —COOR 9 , —CO—R 10 or CN;
  • R 1 when existent, R 2 , R 3 , R 4 and R 5 are the same or different and each is independently hydrogen, halogen, hydroxy, thiol, amino, nitro, nitrooxy, cyano, azido, carboxy, amido, sulfonic acid, sulfonamide, alkyl, alkenyl, alkynyl, ester, ether, aryl, heterocycle, or an oxy derivative, thio derivative, amino derivative, acyl derivative, sulfonyl derivative or sulfinyl derivative,
  • R 1 when existent, R 2 , R 3 , R 4 or R 5 is not hydrogen;
  • R 6 is hydrogen, alkyl, aryl or —CH 2 —R 6 wherein R is aryl, heterocycle, halogen, hydroxy, amino, nitro or cyano;
  • R 7 , R 8 and R 9 are the same or different and each is independently hydrogen, hydroxy, alkyl, aryl, heterocycle or an oxy derivative
  • R 10 is hydrogen, hydroxy, thiol, halogen, alkyl, aryl, heterocycle or a thio derivative
  • At least one substituent R 1 to R 5 is different from hydrogen.
  • Some non-substituted compounds are referred to in U.S. Pat. Nos. 5,468,733 and 5,516,759.
  • U.S. Pat. No. 5,468,733 refers to non-ring substituted 2-oxo-1-pyrrolidinyl and 2-oxo-1-piperidinyl derivatives as inhibitors of the oncogene Ras protein.
  • these compounds block the ability of Ras to transform normal cells to cancer cells, and therefore can be included in several chemotherapeutic compositions for treating cancer.
  • U.S. Pat. No. 5,516,759 refers to non-ring substituted 2-oxo-1-pyrrolidinyl, 2-oxo-1-piperidinyl and azepanyl derivatives present at the N-terminus of dodecapeptides possessing LHRH (luteinizing hormone-releasing hormone) antagonistic activity.
  • LHRH antagonists are useful in the treatment of a variety of conditions in which suppression of sex steroids plays a key role including contraception, delay of puberty, treatment of benign prostatic hyperplasia a. o.
  • R 11 and R 12 are the same or different and each is independently amido, alkyl, alkenyl, alkynyl, acyl, ester, ether, aryl, aralkyl, heterocycle or an oxy derivative, thio derivative, acyl derivative, amino derivative, sulfonyl derivative, or sulfinyl derivative, each optionally substituted with any suitable group, including, but not limited to, one or more moieties selected from lower alkyl or other groups as described below as substituents for alkyl.
  • oxy derivative is defined as including —O—R 11 groups wherein R 11 is as defined above except for “oxy derivative”.
  • Non-limiting examples are alkoxy, alkenyloxy, alkynyloxy, acyloxy, oxyester, oxyamido, alkylsulfonyloxy, alkylsulfinyloxy, arylsulfonyloxy, arylsulfinyloxy, aryloxy, aralkoxy or heterocyclooxy such as pentyloxy, allyloxy, methoxy, ethoxy, phenoxy, benzyloxy, 2-naphthyloxy, 2-pyridyloxy, methylenedioxy, carbonate.
  • thio derivative is defined as including —S—R 11 groups wherein R 11 is as defined above except for “thio derivative”.
  • Non-limiting examples are alkylthio, alkenylthio, alkynylthio and arylthio.
  • amino derivative is defined as including —NHR 11 or —NR 11 R 12 groups wherein R 11 and R 12 are as defined above.
  • Non-limiting examples are mono- or di-alkyl-, alkenyl-, alkynyl- and arylamino or mixed amino.
  • acyl derivative represents a radical derived from carboxylic acid and thus is defined as including groups of the formula R—CO—, wherein R 11 is as defined above and may also be hydrogen. Preferred are acyl derivatives of formula —COR 11 wherein R 11 is selected from hydrogen, C1-12 alkyl, C2-12 alkenyl, C2-12 alkenyl, heterocyle and aryl.
  • Non-limiting examples are formyl, acetyl, propionyl, isobutyryl, valeryl, lauroyl, heptanedioyl, cyclohexanecarbonyl, crotonoyl, fumaroyl, acryloyl, benzoyl, naphthoyl, furoyl, nicotinoyl, 4-carboxybutanoyl, oxalyl, ethoxalyl, cysteinyl, oxamoyl.
  • sulfonyl derivative is defined as including a group of the formula —SO 2 —R 11 , wherein R 11 is as defined above except for “sulfonyl derivative”.
  • Non-limiting examples are alkylsulfonyl, alkenylsulfonyl, alkynylsulfonyl and arylsulfonyl.
  • sulfinyl derivative is defined as including a group of the formula —SO—R 11 , wherein R 11 is as defined above except for “sulfinyl derivative”.
  • Non-limiting examples are alkylsulfinyl, alkenylsulfinyl, alkynylsulfinyl and arylsulfinyl.
  • alkyl is defined as including saturated, monovalent hydrocarbon radicals having straight, branched or cyclic moieties or combinations thereof and generally containing 1-20 carbon atoms, most often 1 to 12 carbon atoms, preferably 1-7 carbon atoms for non-cyclic alkyl and 3-7 carbon atoms for cycloalkyl (in these two preferred cases, unless otherwise specified, “lower alkyl”), each optionally substituted by, preferably 1 to 5, substituents independently selected from the group consisting of halogen, hydroxy, thiol, amino, nitro, cyano, thiocyanato, acyl, acyloxy, sulfonyl derivative, sulfinyl derivative, alkylamino, carboxy, ester, ether, amido, azido, cycloalkyl, sulfonic acid, sulfonamide, thio derivative, alkylthio, oxyester, oxyamido, hetero
  • alkyl groups containing 1 to 7 carbon atoms each optionally substituted by one or more substituents selected from hydroxy, halogen, cyano, thiocyanato, alkoxy, azido, alkylthio, cyclopropyl, acyl and phenyl.
  • substituents selected from hydroxy, halogen, cyano, thiocyanato, alkoxy, azido, alkylthio, cyclopropyl, acyl and phenyl.
  • C1-4 alkyl and C3-7 cycloalkyl each optionally substituted by one or more hydroxy, halogen, lower alkyl or/and azido.
  • alkyl groups are hydroxymethyl, propyl, butyl, 2,2,2-trifluoroethyl, 2-bromo-2,2-difluoroethyl, 2-chloro-2,2-difluoroethyl, 3,3,3-trifluoropropyl, cyclopropylmethyl, iodomethyl, azidomethyl, 2,2-difluoropropyl, 2-iodo-2,2-difluoroethyl.
  • lower alkyl refers to C 1 to C 7 saturated straight, branched or cyclic hydrocarbon.
  • Non limiting examples are methyl, ethyl, propyl, isopropyl, butyl, tertiobutyl, pentyl, cyclopropyl, cyclopentyl, isopentyl, neopentyl, hexyl, isohexyl, cyclohexyl, 3-methypentyl, 2,2-dimethylbutyl, optionally substituted with any suitable group, including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • lower alkyl is methyl.
  • alkenyl is defined as including both branched and unbranched, unsaturated hydrocarbon radicals having at least one double bond, and being optionally substituted by at least one substituent selected from the group consisting of halogen, hydroxy, thiol, amino, thiocyanato, azido, alkylthio, cycloalkyl, acyl, nitro, cyano, aryl and heterocycle.
  • Most preferred is vinyl, optionally substituted by one or more halogen or/and lower alkyl, and especially 2,2-difluorovinyl, 2,2-dibromovinyl and 2,2-dichloroviny
  • Preferred alkynyl groups are C2-12 alkynyl, especially C2-6 alkynyl, optionally being substituted by one or more substituents selected from halogen, cyano, thiocyanato, azido, alkylthio, acyl, aryl such as phenyl and alkyl, preferably cycloalkyl.
  • ethynyl, propynyl and butynyl are preferred, optionally substituted by lower alkyl or/and halogen, and especially 1-propynyl, cyclopropylethynyl, 3-methyl-1-butynyl and 3,3,3-trifluoro-1-propynyl.
  • alkyl, alkenyl and alkynyl represent straight- or branched chains, C1-12, preferably C1-4-alkylene or C2-12-, preferably C2-4-alkenylene or -alkynylene moieties respectively.
  • branched derivatives are conventionally qualified by prefixes such as “n”, “sec”, “iso” and the like (e.g. “n-propyl”, “sec-butyl”) are in the n-form unless otherwise stated.
  • aryl is defined as including an organic radical derived from an aromatic hydrocarbon consisting of at least one ring, most often 1 to 3 rings and generally containing 6-30 carbon atoms by removal of one hydrogen, such as phenyl and naphthyl, each optionally substituted by one or more substituents independently selected from halogen, hydroxy, thiol, amino, nitro, cyano, acyl, acyloxy, sulfonyl, sulfinyl, alkylamino, carboxy, ester, ether, amido, azido, sulfonic acid, sulfonamide, alkylsulfonyl, alkylsulfinyl, C1-6-alkylthio, oxyester, oxyamido, aryl, C1-6-alkoxy, C6-10-aryloxy, C1-6-alkyl, C1-6-haloalkyl.
  • Aryl radicals are preferably monocyclic or bicyclic containing 6-10 carbon atoms.
  • Preferred aryl groups are phenyl and naphthyl each optionally substituted by one or more substituents independently selected from halogen, nitro, amino, azido, C1-6-alkoxy, C1-6-alkyl, C1-6-haloalkyl, sulfonyl and phenyl.
  • Preferred aryl is phenyl, optionally substituted by one or more halogen, lower alkyl, azido or nitro, such as 3-chlorophenyl and 3-azidophenyl.
  • halogen includes an atom of Cl, Br, F, I.
  • hydroxy represents a group of the formula —OH.
  • thiol represents a group of the formula —SH.
  • cyano represents a group of the formula —CN.
  • nitro represents a group of the formula —NO 2 .
  • nitrooxy represents a group of the formula —ONO 2 .
  • amino represents a group of the formula —NH 2 .
  • azido represents a group of the formula —N 3 .
  • sulfonic acid represents a group of the formula —SO 3 H.
  • sulfonamide represents a group of the formula —SO 2 NH 2 .
  • esters as used herein, is defined as including a group of formula —COO—R 11 wherein R 11 is as defined above except oxy derivative, thio derivative or amino derivative.
  • esters of formula —COOR 11 wherein R 11 is selected from C1-12 alkyl, C2-12 alkenyl, C2-12 alkynyl and aryl. Most preferred are esters where R 11 is a lower alkyl, especially methyl.
  • ether is defined as including a group selected from C1-50-straight or branched alkyl, or C2-50-straight or branched alkenyl or alkynyl groups or a combination of the same, interrupted by one or more oxygen atoms.
  • heterocycle is defined as including an aromatic or non aromatic cyclic alkyl, alkenyl, or alkynyl moiety as defined above, having at least one O, S and/or N atom interrupting the carbocyclic ring structure and optionally, one of the carbon of the carbocyclic ring structure may be replaced by a carbonyl, and optionally being substituted with any suitable group, including but not limited to one or more moieties selected from lower alkyl, or other groups as described above for the alkyl groups.
  • heterocycles are pyridyl, furyl, pyrrolyl, thienyl, isothiazolyl, triazolyl, imidazolyl, benzimidazolyl, tetrazolyl, quinazolinyl, quinolizinyl, naphthyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl, quinolyl, isoquinolyl, isobenzofuranyl, benzothienyl, pyrazolyl, indolyl, indolizinyl, purinyl, isoindolyl, carbazolyl, thiazolyl, 1,2,4-thiadiazolyl, thiomorpholinyl, thieno (2,3-b) furanyl, furopyranyl, benzofuranyl, benzoxepinyl, isooxazolyl, oxazolyl, thianthrenyl,
  • 5-azauracilyl triazolopyridinyl, imidazolopyridinyl, pyrrolopyrimidinyl, pyrazolopyrimidinyl, tetrahydrofuranyl, tetrahydropyranyl, piperidinyl, piperidyl, piperazinyl, imidazolidinyl, morpholino, morpholinyl, 1-oxaspiro (4.5) dec-2-yl, pyrrolidinyl, 2-oxo-pyrrolidinyl, sugar moieties (i.e.
  • heterocycle also includes bicyclic, tricyclic and tetracyclic, spiro groups in which any of the above heterocyclic rings is fused to one or two rings independently selected from an aryl ring, a cyclohexane ring, a cyclohexene ring, a cyclopentane ring, a cyclopentene ring or another monocyclic heterocyclic ring or where a monocyclic heterocyclic group is bridged by an alkylene group, such as quinuclidinyl, 7-azabicyclo (2.2.1) heptanyl, 7-oxabicyclo (2.2.1) heptanyl, 8-azabicyclo (3.2.1) octanyl.
  • alkylene group such as quinuclidinyl, 7-azabicyclo (2.2.1) heptanyl, 7-oxabicyclo (2.2.1) heptanyl, 8-azabicyclo (3.2.1) octanyl.
  • the heterocycle is preferably selected from triazolyl, tetrazolyl, pyrrolidinyl, pyridyl, 1-oxidopyridyl, thiomorpholinyl, benzodioxolyl, furyl, oxazolyl, pyrimidinyl, pyrrolyl, thiadiazolyl, thiazolyl, thienyl and piperazinyl, each optionally substituted by one or more substituents selected from halogen, alkyl, substituted alkyl, alkoxy, nitro, amino, acyl and phenyl.
  • the heterocycle is selected from tetrazolyl, pyrrolidinyl, pyridyl, furyl, pyrrolyl, thiazolyl and thienyl, each optionally substituted by one or more substituents selected from halogen, alkyl, halogen substituted alkyl, acyl, alkoxy, nitro, amino and phenyl, and especially from 2- and 3-thienyl, optionally substituted by one or more halogen, acyl such as formyl, cyano and/or lower alkyl, such as methyl.
  • R substituent refers to R 1 , R 2 , R 3 , R 4 or R 5 , independently.
  • a compound of formula I is as defined above wherein n represents 0.
  • the compound of formula I is as defined above wherein n represents 1.
  • R substituent(s) is/are hydrogen.
  • compounds of formula I are as defined above wherein A 1 represents an oxygen atom.
  • a 1 represents an oxygen atom.
  • compounds of formula I are as defined above wherein X is CONR 7 R 8 , especially CONH 2 .
  • X is CONR 7 R 8 , especially CONH 2 .
  • compounds of formula I are as defined above wherein R 6 represents hydrogen, C1-4 alkyl, or a CH 2 —R 6a group wherein R 6a represents a heterocycle. Most preferably R 6 is a C1-4 alkyl, especially ethyl.
  • R 6 is ethyl we refer to 2-(2-oxo (or thioxo)-1-piperidinyl) butanamide or 2-(2-oxo (or thioxo)-1-azepanyl) butanamide derivatives.
  • compounds of formula I are as defined above wherein the carbon atom to which R 6 is attached is of the S configuration.
  • R 6 is ethyl
  • A is oxygen
  • X is CONR 7 R 5 we refer then to (2S)-2-(2-oxo-1-piperidinyl) butanamide or (2S)-2-(2-oxo-1-azepanyl) butanamide derivatives.
  • R 3 and R 4 are the same or different and each is independently hydrogen, halogen, nitro, nitrooxy, cyano, carboxy, amido, sulfonic acid, sulfonamide, alkyl, alkenyl, alkynyl, ester, ether, aryl, heterocycle, acyl derivative, sulfonyl derivative or sulfinyl derivative;
  • R 1 when existent, R 2 when n 0 and R 5 are hydrogen;
  • R 6 is hydrogen, alkyl, aryl or —CH 2 —R 6a wherein R 6a is aryl, heterocycle, halogen, hydroxy, amino, nitro or cyano;
  • C1-12 alkyl each optionally substituted by one or more substituents selected from hydroxy, halogen, cyano, thiocyanato, alkoxy, azido, alkyltio, cycloalkyl, acyl, aryl and heterocycle;
  • C2-12 alkenyl each optionally substituted by one or more substituents selected from halogen, cyano, thiocyanato, azido, alkylthio, alkyl, aryl and acyl;
  • C2-12 alkynyl each optionally substituted by one or more substituents selected from halogen, cyano, thiocyanato, azido, alkylthio, alkyl, aryl and acyl; acyl derivative of formula —CO—R 11 , wherein R 11 is selected from C1-12 alkyl, C2-12 alkenyl, C2-12 alkynyl, heterocycle and aryl;
  • heterocycle selected from triazolyl, tetrazolyl, pyrrolidinyl, pyridyl, 1-oxidopyridyl, thiomorpholinyl, benzodioxolyl, furyl, oxazolyl, pyrimidinyl, pyrrolyl, thiadiazolyl, thiazolyl, thienyl and piperazinyl, each optionally substituted by one or more substituents selected from halogen, alkyl, substituted alkyl, alkoxy, nitro, amino, acyl and phenyl;
  • aryl each optionally substituted by one or more substituents selected from C1-6 alkyl, C1-6 haloalkyl, C1-6 alkoxy, C1-6 alkylthio, amino, azido, sulfonyl, aryl and nitro.
  • C1-7 alkyl each optionally substituted by one or more substituents selected from hydroxy, halogen, cyano, thiocyanato, alkoxy, azido, alkylthio, cyclopropyl, acyl and phenyl;
  • C2-6 alkenyl each optionally substituted by one or more substituents selected from halogen, cyano, thiocyanato, azido, alkylthio, cycloalkyl, phenyl and acyl;
  • C2-6 alkynyl each optionally substituted by one or more substituents selected from halogen, cyano, thiocyanato, azido, alkylthio, cycloalkyl, phenyl and acyl;
  • heterocycle selected from tetrazolyl, pyrrolidinyl, pyridyl, furyl, pyrrolyl, thiazolyl and thienyl, each optionally substituted by one or more substituents selected from halogen, alkyl, halogen substituted alkyl, acyl, alkoxy, nitro, amino and phenyl;
  • phenyl each optionally substituted by one or more substituents selected from C1-6 alkyl, halogen substituted alkyl, halogen, alkoxy, amino, azido, sulfonyl, phenyl and nitro.
  • the compound is as defined above wherein R 1 , R 2 , R 4 and R 5 are hydrogen.
  • the compound is as defined above wherein R 1 , R 2 , R 3 and R 5 are hydrogen.
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of:
  • R 1 is hydrogen
  • R 2 is hydrogen or C1-20-alkyl
  • R 3 is hydrogen, C1-20-alkyl, C 4-8 -cycloalkyl, C5-8-cycloalkenyl, aryl, aromatic or non aromatic heterocycle, C1-20-alkoxy, or a group of formula —W—R 8 , R 3a is hydrogen, C1-20-alkyl or a group of formula:
  • NR 3 R 3a is a group of formula
  • R 4 is hydrogen
  • R 5 is hydrogen; nitro; halogen; azido; cyano; —S—C1-4-alkyl; —SO—C1-4-alkyl; —SO 2 —C1-4-alkyl: —SONH 2 ; C1-20-alkyl unsubstituted or substituted by halogen; or C1-20-alkoxy unsubstituted or substituted by halogen,
  • R 6 is hydrogen, C1-20-alkyl or halogen
  • R 7 is hydrogen, C1-20-alkyl or halogen
  • W is C1-12-alkylene, —NH— or —NHC( ⁇ O)—
  • X is O, S or NH
  • Y is O, S, —CR 12 R 13 —, —NR 14 — or —C(—O)—,
  • R 8 is aryl or heterocycle
  • R 9 , R 10 , R 10a and R 11 are independently selected from hydrogen, C1-4-alkyl, halogen, hydroxy or methoxycarbonyl,
  • R 10 and R 10a together form a C3-6-alkylene
  • R 12 is hydrogen, C1-4-alkyl, halogen or hydroxy
  • R 13 is hydrogen
  • CR 12 R 13 is dioxolanyl
  • R 14 is aryl, heterocycle or a group of formula —V—R 15 ,
  • V is C 1-12 -alkylene
  • R 15 is aryl or heterocycle
  • m 1 to 4.
  • n 0 or 1
  • R 5 , R 6 or R 7 is different from hydrogen when R 2 is hydrogen, R 3 is H or 2,6-diisopropylphenyl, and R 3a is H.
  • the compound has the formula I or a pharmaceutically acceptable salt thereof or stereoisomeric forms thereof,
  • R 1 is hydrogen
  • R 2 is hydrogen or C1-20-alkyl
  • R 3 is hydrogen, C1-20-alkyl, C 4-8 -cycloalkyl, C5-8-cycloalkenyl, aryl, aromatic or non aromatic heterocycle, C1-20-alkoxy, or a group of formula —W—R S ,
  • R 3a is hydrogen, C1-20-alkyl or a group of formula:
  • NR 3 R 3a is a group of formula
  • R 4 is hydrogen
  • R 7 is hydrogen; nitro; halogen; C1-20-alkyl unsubstituted or substituted by halogen; or C1-20-alkoxy unsubstituted or substituted by halogen,
  • R 6 is hydrogen, C1-20-alkyl or halogen
  • R 7 is hydrogen, C1-20-alkyl or halogen
  • W is C1-12-alkylene, —NH— or —NHC( ⁇ O)—.
  • X is O, S or NH.
  • Y is O, S, —CR 12 R 13 —, —NR 14 — or —C( ⁇ O)—,
  • R 8 is aryl or heterocycle
  • R 9 , R 10 , R 10a and R 11 are independently selected from hydrogen, C1-4-alkyl, halogen, hydroxy or methoxycarbonyl.
  • R 10 and R 10a together form a C3-6-alkylene
  • R 12 is hydrogen, C1-4-alkyl, halogen or hydroxy
  • R 13 is hydrogen
  • CR 12 R 13 is dioxolanyl
  • R 14 is aryl, heterocycle or a group of formula —V—R 15 ,
  • V is C1-12-alkylene
  • R 15 is aryl or heterocycle
  • n 1 to 4
  • n 0 or 1
  • R 5 , R 6 or R 7 is different from hydrogen when R 2 is hydrogen, R 3 is H or 2,6-diisopropylphenyl, and R 3a is H.
  • alkyl is defined as including saturated, monovalent hydrocarbon radicals having straight, branched or cyclic moieties or combinations thereof and containing 1-20 carbon atoms, preferably 1-6 carbon atoms and more preferably 1-4 carbon atoms for non-cyclic alkyl and 3-8 carbon atoms for cycloalkyl. Alliyl moieties may optionally be substituted by 1 to 5 substituents independently selected from halogen, hydroxy, alkoxy, alkoxycarbonyl, ester or alkylamino.
  • Preferred alkyl groups are methyl, ethyl, n-propyl, isopropyl, trifluoromethyl, n-butyl, 2-fluoroethyl, 3-hydroxypropyl, 3-hydroxy-2,2-dimethylpropyl, 1-(hydroxymethyl) propyl, 3,3,3-trifluoro-2-hydroxypropyl, 3-ethoxypropyl, 2-ethoxy-2-oxoethyl and 3-(dimethylamino) propyl.
  • cycloalkyl refers to a monovalent group of 3 to 18 carbon atoms, preferably 4-8 carbon atoms, derived from a saturated cyclic or polycyclic hydrocarbon which may be substituted by any suitable group including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • Preferred cycloalkyl group is cycloheptyl.
  • alkylene represents a divalent alkyl group, having straight or branched moieties, containing 1-12 carbon atoms, preferably 1-6 carbon atoms, and being optionally substituted with any suitable group, including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • Preferred alkylene groups are methylene, ethylene, hydroxyethylene, trimethylene or propylene.
  • cycloalkenyl is defined as a cyclic unsaturated hydrocarbon radical having at least one double bond, containing 4-20 carbon atoms, preferably 5-8 carbon atoms, and being optionally substituted with any suitable group, including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • Preferred cycloalkenyl group is 6-(hydroxymethyl)cyclohex-3-en-1-yl.
  • aryl is defined as including an organic radical derived from an aromatic hydrocarbon consisting of 1-3 rings and containing 6-30 carbon atoms by removal of one hydrogen, such as phenyl and naphthyl each optionally substituted by 1 to 5 substituents independently selected from halogen, hydroxy, nitro, C1-6-alkyl, C1-6-alkoxy, C1-6-alkylsulfonyl, trifluoromethylthio or pyridinylalkyl.
  • Aryl radicals are preferably phenyl radicals.
  • Preferred aryl groups are phenyl, 3-hydroxyphenyl, 3-fluorophenyl, 3-methylphenyl.
  • halogen includes an atom of Cl, Br, F, I.
  • nitro represents a group of the formula —NO 2 .
  • hydroxy represents a group of the formula —OH.
  • alkoxy represents a group of formula —OR b wherein R b is an alkyl group, as defined above.
  • esters represents a group of formula —COOR c wherein R c is an alkyl group or an aryl group, as defined above.
  • alkoxycarbonyl represents a group of formula —COOR d wherein R d is an alkyl group, as defined above.
  • amino represents a group of the formula —NH 2 .
  • alkylamino represents a group of formula —NHR e or —NR e R f wherein R e and R f are alkyl group as defined above.
  • alkylsulfonyl as used herein is defined as representing a group of formula —SO 2 —R g , wherein R f is C1-4-alkyl.
  • heterocycle as used herein is defined as including an aromatic or non aromatic cycloalkyl or cycloalkenyl moiety as defined above, having at least one O, S and/or N atom interrupting the carbocyclic ring structure and optionally, one of the carbon of the carbocyclic ring structure may be replaced by a carbonyl.
  • Non-limiting examples of aromatic heterocycles are pyrazolyl, furyl, imidazolyl, triazolyl, oxazolyl, pyridinyl, pyrrolyl, thienyl, isothiazolyl, benzimidazolyl, tetrazolyl, isooxazolyl, oxazolyl, thiazolyl, 1,2,4-thiadiazolyl, oxadiazole, pyridazinyl, pyrimidinyl, pyrazinyl, isoindolyl, triazolopyridinyl, imidazolopyridinyl, pyrrolopyrimidinyl, pyrazolopyrimidinyl, quinazolinyl, quinolizinyl, naphthyridinyl, quinolyl, isoquinolyl, isobenzofuranyl, benzothienyl, indolyl, indolizinyl, puriny
  • Non-limiting examples of non aromatic heterocycles are tetrahydrofuranyl, piperidinyl, piperidyl, piperazinyl, imidazolidinyl, morpholinyl, thiomorpholinyl, pyrrolidinyl, thiazolidinyl, indolinyl, tetrahydrobenzazocinyl, dihydroisochromenyl, tetrahydropyranyl, oxooctahydroquinolinyl, dioxolanyl, 1-oxaspiro (4.5) dec-2-yl, pyrrolidinyl, 2-oxo-pyrrolidinyl, 8-thiabicyclo [3.2.1]cyclooctanyl, 1,4-dithiepanyl, tetrahydro-2H-thiopyranyl, azepanyl and azocanyl, optionally substituted by 1 to 5 substituents independently selected from halogen, hydroxy,
  • More preferred non aromatic heterocycles are tetrahydrofuranyl, piperidinyl, piperidyl, piperazinyl, imidazolidinyl, morpholinyl, thiomorpholinyl, pyrrolidinyl, thiazolidinyl, indolinyl, tetrahydro-1-benzazocin-1 (2H)-yl, 3,4-dihydro-1H-isochromen-1-yl, tetrahydropyranyl, oxooctahydroquinolinyl and dioxolanyl.
  • heterocycle also includes bicyclic, tricyclic and tetracyclic, spiro groups in which any of the above heterocyclic rings is fused to one or two rings independently selected from an aryl ring, a cycloalkyl ring, a cycloalkenyl ring or another monocyclic heterocyclic ring or where a monocyclic heterocyclic group is bridged by an alkylene group, such as quinuclidinyl, 7-azabicyclo (2.2.1)heptanyl, 7-oxabicyclo (2.2.1)heptanyl and 8-azabicyclo (3.2.1)octanyl.
  • pyridinylalkyl represents a group of formula —R h -pyridinyl in which R h is C1-4-alkylene.
  • azido represents a group of the formula —N 3 .
  • cyano as used herein, represents a group of the formula —CN.
  • R 2 is hydrogen or C1-4-alkyl.
  • R 2 is hydrogen, methyl or ethyl. More preferably, R 2 is hydrogen or methyl.
  • R 3 is hydrogen; C1-6-alkyl unsubstituted or substituted by 1 to 5 substituents selected from halogen, hydroxy, alkoxy, alkoxycarbonyl or alkylamino; C5-7-cycloalkyl; (hydroxymethyl)cyclohexenyl; phenyl unsubstituted or substituted by 1 to 5 substituents selected from halogen, C1-4-alkyl, hydroxy, methoxy, nitro, methylsulfonyl, trifluoromethylthio or pyridinylalkyl; pyridinyl unsubstituted or substituted by methoxy; triazolyl; C1-4-alkoxy; or a group of formula —W—R 8 wherein:
  • W is C1-4-alkylene unsubstituted or substituted by halogen, hydroxy, C1-4-alkyl or alkoxy; —NH—; or —NHC( ⁇ O)—; and
  • R 8 is phenyl unsubstituted or substituted by 1 to 5 substituents selected from halogen, C1-4-alkyl, hydroxy, methoxy, nitro, methylsulfonyl or trifluoromethylthio; furyl unsubstituted or substituted by methyl; pyrazolyl; pyridinyl; morpholinyl; tetrahydrobenzazocinyl; piperidinyl unsubstituted or substituted by methyl; dihydroisochromenyl or dihydroimidazolyl.
  • R 3 is hydrogen, n-butyl, cycloheptyl, 2-fluoroethyl, 3-hydroxypropyl, 3-hydroxy-2,2-dimethylpropyl, 1-(hydroxymethyl) propyl, 3,3,3-trifluoro-2-hydroxypropyl, 3-ethoxypropyl, 2-ethoxy-2-oxoethyl.
  • R 3a is hydrogen, C1-4-alkyl or a group of formula
  • R 3 is hydrogen, methyl or tetrahydrofuran-2-ylmethyl. More preferably. R 3a is hydrogen.
  • NR 3 R 3a is piperidinyl unsubstituted or substituted by hydroxy; thiomorpholinyl; thiazolidinyl unsubstituted or substituted by C1-4-alkoxycarbonyl; 2,5-dihydro-1H-pyrrol-1-yl; 1,4-dioxa-8-azaspiro[4.5]dec-8-yl; 4-oxooctahydro-1(2H)-quinolinyl; or a group of formula
  • R 14 is pyridinyl; phenyl unsubstituted or substituted by halogen, hydroxy, C1-4-alkyl; or a group of formula —V—R 15 wherein V is unsubstituted C1-4-alkylene and R 15 is phenyl or morpholinyl.
  • NR 3 R 3a is 4-pyridin-2-ylpiperazin-1-yl, 4-(3-methylphenyl)piperazin-1-yl, 4-(4-hydroxyphenyl)piperazin-1-yl, 4-(2-phenylethyl)piperazin-1-yl, 4-(2-morpholin-4-ylethyl)piperazin-1-yl, 3-hydroxypiperidin-1-yl, thiomorpholin-4-yl, 4-methoxycarbonyl-1,3-thiazolidin-3-yl, 2,5-dihydro-1H-pyrrol-1-yl, 1,4-dioxa-8-azaspiro[4.5]dec-8-yl or 4-oxooctahydro-1(2H)-quinolinyl.
  • R 5 is hydrogen, nitro, halogen, C1-4-alkyl, unsubstituted or substituted by halogen, or C1-4-alkoxy unsubstituted or substituted by halogen.
  • R 5 is hydrogen, methyl, ethyl, trifluoromethyl, trifluoromethoxy, n-propyl, isopropyl, nitro, or halogen. More preferably, R 5 is halogen or trifluoromethyl.
  • R 6 is hydrogen, C1-6-alkyl or halogen.
  • R 6 is hydrogen, methyl or Cl. More preferably. R 6 is hydrogen.
  • R 7 is hydrogen, methyl or halogen.
  • R 7 is hydrogen, methyl, Br, F or Cl. More preferably, R 7 is hydrogen, Br or F.
  • Combinations of one or more of these preferred compound groups are especially preferred.
  • the compound has the formula I or a pharmaceutically acceptable salt thereof or stereoisomeric forms thereof,
  • R 1 is hydrogen
  • R 2 is hydrogen or C1-4-alkyl
  • R 3 is hydrogen; C1-6-alkyl unsubstituted or substituted by 1 to 5 substituents selected from halogen, hydroxy, alkoxy, alkoxycarbonyl or alkylamino; C5-7-cycloalkyl; (hydroxymethyl)cyclohexenyl; phenyl unsubstituted or substituted by 1 to 5 substituents selected from halogen, C1-4-alkyl, hydroxy, methoxy, nitro, methylsulfonyl, trifluoromethylthio or pyridinylalkyl; pyridinyl unsubstituted or substituted by methoxy; triazolyl; C1-4-alkoxy; or a group of formula —W—R 8 ,
  • R 3a is hydrogen, C1-4-alkyl or a group of formula
  • R 3a is piperidinyl unsubstituted or substituted by hydroxy; thiomorpholinyl; thiazolidinyl unsubstituted or substituted by C1-4-alkoxycarbonyl: 2,5-dihydro-1H-pyrrol-1-yl; 1,4-dioxa-8-azaspiro[4.5]dec-8-yl; 4-oxooctahydro-1(2H)-quinolinyl; or a group of formula
  • R 4 is hydrogen
  • R 5 is hydrogen; nitro; halogen; C1-4-alkyl, unsubstituted or substituted by halogen; or C1-4-alkoxy unsubstituted or substituted by halogen,
  • R 6 is hydrogen, C1-6-allyl or halogen
  • R 7 is hydrogen, methyl or halogen
  • W is C1-4-alkylene unsubstituted or substituted by halogen, hydroxy, C1-4-alkyl or alkoxy; —NH—; or —NHC( ⁇ O)—,
  • R 8 is phenyl unsubstituted or substituted by 1 to 5 substituents selected from halogen, C1-4-alkyl, hydroxy, methoxy, nitro, methylsulfonyl or trifluoromethylthio; furyl unsubstituted or substituted by methyl; pyrazolyl; pyridinyl; morpholinyl; tetrahydrobenzazocinyl; piperidinyl unsubstituted or substituted by methyl; dihydroisochromenyl or dihydroimidazolyl,
  • R 14 is pyridinyl; phenyl unsubstituted or substituted by halogen, hydroxy, C1-4-alkyl; or a group of formula —V—R 15
  • V is unsubstituted C1-4-alkylene
  • R 15 is phenyl or morpholinyl
  • n 1 to 4
  • R 1 is H or 2,6-diisopropylphenyl
  • R 3a is H.
  • the compound has the formula I or a pharmaceutically acceptable salt thereof or stereoisomeric forms thereof,
  • R 1 is hydrogen
  • R 2 is hydrogen, methyl or ethyl
  • R 3 is hydrogen, n-butyl, cycloheptyl, 2-fluoroethyl, 3-hydroxypropyl, 3-hydroxy-2,2-dimethylpropyl, 1-(hydroxymethyl) propyl, 3,3,3-trifluoro-2-hydroxypropyl, 3-ethoxypropyl, 2-ethoxy-2-oxoethyl, 3-(dimethylamino) propyl, 6-(hydroxymethyl)cyclohex-3-en-1-yl, 3-hydroxyphenyl, 3-fluorophenyl, 3-(2-pyridin-2-ylethyl)phenyl, 3,4-dimethylphenyl, 4-tert-butylphenyl, benzyl, 4-hydroxy-3-methoxybenzyl, 4-methylsulfonylbenzyl, 2-nitrobenzyl, 2-chloro-6-fluorobenzyl, 2-[(trifluoromethyl)thio]benzyl, 2-hydroxy-2-phenylethyl, 2-(3,4
  • R 3a is hydrogen, methyl or tetrahydrofuran-2-ylmethyl, or NR 3 R 3a 4-pyridin-2-ylpiperazin-1-yl.
  • R 4 is hydrogen
  • R 5 is hydrogen, methyl, ethyl, trifluoromethyl, trifluoromethoxy, n-propyl, isopropyl, nitro or halogen.
  • R 6 is hydrogen, methyl or Cl
  • R 7 is hydrogen, methyl, Br, F or Cl
  • R 5 , R 6 or R 7 is different from hydrogen when R 2 is hydrogen, R 3 is H or 2,6-diisopropylphenyl, and R 3a is H.
  • R 2 is hydrogen or methyl.
  • R 3 is hydrogen, R 3a is hydrogen, R 5 is halogen or trifluoromethyl, R 6 is hydrogen and R 7 is hydrogen, Br or F.
  • R 2 when R 2 is C1-20-alkyl, the carbon atom to which R 2 is attached is preferably in the “S”-configuration.
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: 2-(5-iodo-2-oxo-2,3-dihydro-H-indol-1-yl)acetamide; 2-(5-chloro-2-oxo-2,3-dihydro-1H-indol-1-yl)acetamide; 2-(5,7-dibromo-2-oxo-2,3-dihydro-1H-indol-1-yl)acetamide; 2-(5-nitro-2-oxo-2,3-dihydro-1H-indol-1-yl)acetamide; 2-(5-methyl-2-oxo-2,3-dihydro-1H-indol-1-yl)acetamide; 2-(5-chloro-2-oxo-2,3-dihydro-1H-indol-1-yl) propanamide, (2R)-2-(5-chloro-2-oxo-2,
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: 2-(5-iodo-2-oxo-2,3-dihydro-1H-indol-1-yl)acetamide; 2-(5-chloro-2-oxo-2,3-dihydro-1H-indol-1-yl)acetamide; 2-(5,7-dibromo-2-oxo-2,3-dihydro-1H-indol-1-yl)acetamide; (2S)-2-(5-chloro-2-oxo-2,3-dihydro-1H-indol-1-yl) propanamide; 2-[2-oxo-5-(trifluoromethyl)-2,3-dihydro-1H-indol-1-yl]acetamide and 2-(5-chloro-7-fluoro-2-oxo-2,3-dihydro-1H-indol-1-yl)acet
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: 2-(5-chloro-2-oxo-2,3-dihydro-H-indol-1-yl)acetamide and (2S)-2-(5-chloro-2-oxo-2,3-dihydro-H-indol-1-yl) propanamide.
  • R 1 is hydrogen, C 1-20 alkyl, C 3-8 cycloalkyl, halogen, hydroxy, alkoxy, aryloxy, ester, amido, cyano, nitro, amino, guanidine, amino derivative, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkylsulfinyl, arylsulfinyl, aryl or heterocycle;
  • R 2 is hydrogen, C 1-20 alkyl, alkoxy, amino, halogen, hydroxy, ester, amido, nitro, cyano, carbamate, or aryl:
  • R 3 is hydrogen, C 1-20 alkyl, alkoxy, amino, halogen, hydroxy, ester, amido, nitro, cyano, carbamate, or aryl;
  • R 2 and R 3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R 4 is hydrogen, C 1-20 alkyl, C 2-12 alkenyl, C 2-12 alkynyl, aryl, azido, alkoxycarbonylamino, arylsulfonyloxy or heterocycle;
  • R 4a is hydrogen or C 1-20 alkyl
  • R 4 and R 4a can form together a C 3-8 cycloalkyl
  • R 5 is hydrogen
  • R 4 , R 4a and R 5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R 6 is hydrogen or C1-20 alkyl
  • R 7 is hydrogen
  • R 6 and R 7 are linked together to form a C 3-6 cycloalkyl
  • R 8 is hydrogen, halogen, nitro, cyano, C 1-20 alkyl or alkoxy:
  • R 9 is hydrogen, C1-20 alkyl, halogen, hydroxy, alkoxy, aryloxy, ester, amido, cyano, nitro, amino, amino derivative, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkylsulfinyl or arylsulfinyl;
  • R 10 is hydrogen, C1-20 alkyl, halogen, hydroxy, alkoxy, aryloxy, ester, amido, cyano, nitro, amino, amino derivative, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkylsulfinyl or arylsulfinyl;
  • R 11 is hydrogen, halogen, nitro, cyano, C1-20 alkyl or alkoxy;
  • R 12 is hydrogen or halogen
  • R 13 is hydrogen, nitro, halogen, heterocycle, amino, aryl, C1-20 alkyl unsubstituted or substituted by halogen, or alkoxy unsubstituted or substituted by halogen;
  • R 14 is hydrogen, C1-20 alkyl or halogen
  • R 15 is hydrogen, C1-20 alkyl or halogen
  • R 4 is different from hydrogen when represents a group of formula
  • the asterisk * indicates the point of attachment of the substituents.
  • the compounds have the formula I, their tautomers, geometrical isomers (including cis and trans, Z and E isomers), enantiomers, diastereoisomers and mixtures thereof (including all possible mixtures of stereoisomers), or pharmaceutically acceptable salts thereof,
  • R 1 is hydrogen, C 1-20 alkyl, C 3-8 cycloalkyl, halogen, hydroxy, ester, amido, cyano, nitro, amino, guanidine, alkylthio, alkylsulfonyl, alkylsulfinyl, aryl or heterocycle;
  • R 2 is hydrogen, C1-20 alkyl, halogen, cyano, ester, carbamate or amido;
  • R 3 is hydrogen, cyano, C 1-20 alkyl, halogen or ester; or R 2 and R 3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R 4 is hydrogen, C1-20 alkyl, C 2-12 alkenyl or aryl
  • R 4a is hydrogen
  • R 5 is hydrogen
  • R 4 , R 4a and R 5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R 6 is hydrogen or C1-20 alkyl
  • R 7 is hydrogen; or R 6 and R 7 are linked together to form a C 3-6 cycloalkyl:
  • R 8 is hydrogen
  • R 9 is hydrogen, C 1-20 alkyl, halogen or alkoxy
  • R 10 is hydrogen, C1-20 alkyl, halogen or cyano
  • R 11 is hydrogen
  • R 12 is hydrogen or halogen
  • R 13 is hydrogen, halogen, heterocycle or C 1-20 alkyl
  • R 14 is hydrogen:
  • R 15 is hydrogen
  • alkyl represents saturated, monovalent hydrocarbon radicals having straight (unbranched) or branched or cyclic or combinations thereof and containing 1-20 carbon atoms, preferably 1-10 carbon atoms, more pre preferred alkyl groups have 1-3 carbon atoms.
  • Alkyl moieties may optionally be substituted by 1 to 5 substituents independently selected from the group consisting of halogen, hydroxy, cyano, azido, aryloxy, alkoxy, alkylthio, alkanoylamino, arylcarbonylamino, aminocarbonyl, methylaminocarbonyl, dimethylaminocarbonyl or aryl.
  • alkyl groups are methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, 1-ethylpropyl, n-heptyl, 2,4,4-trimethylpentyl, n-decyl, chloromethyl, trifluoromethyl, 2-bromo-2,2-difluoroethyl, 2,2,2-trifluoroethyl, 3,3,3-trifluoropropyl, hydroxymethyl, cyanomethyl, azidomethyl, (acetylamino)methyl, (propionylamino)methyl.
  • alkyl groups are methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, 1-ethylpropyl, 2,4,4-trimethylpentyl, chloromethyl, trifluoromethyl. 2,2,2-trifluoroethyl, hydroxymethyl, cyanomethyl, azidomethyl, (acetylamino)methyl, (propionylamino)methyl. (benzoylamino)methyl or 2-(methylthio)ethyl.
  • More preferred alkyl groups are methyl, ethyl, n-propyl, i-propyl, n-butyl, azidomethyl or trifluoromethyl. Most preferred alkyl groups are methyl or n-propyl.
  • cycloalkyl represents a monovalent group of 3 to 8 carbon atoms, usually 3-6 carbon atoms derived from a saturated cyclic hydrocarbon, which may be substituted by any suitable group including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • Preferred cycloalkyl groups are cyclopropyl and cyclohexyl.
  • alkenyl represents straight, branched or cyclic unsaturated hydrocarbon radicals or combinations thereof having at least one carbon-carbon double bond, containing 2-12 carbon atoms, preferably usually 2-4 carbon atoms.
  • Alkenyl groups are being optionally substituted with any suitable group, including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • an alkenyl group is ethenyl (vinyl) optionally substituted by 1 to 3 halogens.
  • Preferred alkenyl group in the present case, is 2,2-difluorovinyl.
  • alkynyl represents straight, branched or cyclic hydrocarbon radicals or combinations thereof containing at least one carbon-carbon triple bond, containing 2-12 carbon atoms, preferably 2-6 carbon atoms, and being optionally substituted by any suitable group, including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • an alkynyl group is a halogenoalkynyl group (haloalkynyl group).
  • Groups qualified by prefixes such as “s”, “i”, “t” and the like are branched derivatives.
  • aryl as used herein, is defined as phenyl optionally substituted by 1 to 4 substituents independently selected from halogen, cyano, alkoxy, alkylthio, C 1-3 alkyl or azido, preferably halogen or azido.
  • aryl groups in the present case are phenyl, 3-chlorophenyl, 3-fluorophenyl, 4-chlorophenyl, 4-fluorophenyl, 3,4-difluorophenyl, 3,5-difluorophenyl, 3-chloro-4-fluorophenyl, 2,3,4-trifluorophenyl, 2,4,5-trifluorophenyl, 2,3,5-trifluorophenyl, 3,4,5-trifluorophenyl. 3-azido-2,4-difluorophenyl or 3-azido-2,4,6-trifluorophenyl.
  • aryl groups are phenyl, 3-chlorophenyl, 3-fluorophenyl, 4-chlorophenyl, 4-fluorophenyl, 3,4-difluorophenyl, 3,5-difluorophenyl, 3-chloro-4-fluorophenyl, 2,3,4-trifluorophenyl, 2,4,5-trifluorophenyl, 2,3,5-trifluorophenyl, 3,4,5-trifluorophenyl or 3-azido-2,4-difluorophenyl.
  • Most preferred aryl groups are phenyl.
  • 3-chlorophenyl 3-fluorophenyl, 3,5-difluorophenyl, 2,3,4-trifluorophenyl, 2,4,5-trifluorophenyl, 2,3,5-trifluorophenyl, 3,4,5-trifluorophenyl or 3-azido-2,4-difluorophenyl.
  • heterocycle is defined as including an aromatic or non aromatic cycloalkyl moiety as defined above, having at least one O, S and/or N atom interrupting the carbocyclic ring structure.
  • Heterocyclic ring moieties can be optionally substituted by alkyl groups or halogens and optionally, one of the carbon of the carbocyclic ring structure may be replaced by a carbonyl.
  • heterocycles are 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-furyl, 3-furyl, 2-thienyl, 3-thienyl, 2-tetrahydrofuranyl, 1H-pyrrol-2-yl, 1-methyl-1H-pyrrol-2-yl, 1H-pyrazol-2-yl, 1H-pyrazol-3-yl, 4-chloro-1-methyl-1H-pyrazol-3-yl, 5-chloro-1,3-dimethyl-1H-pyrazol-4-yl, 1,2,3-thiadiazol-4-yl, 3,5-dimethyl-4-isothiazyl, 1H-imidazol-2-yl, 1-methyl-1H-imidazol-2-yl, 4-methyl-1H-imidazol-5-yl, or 2-methyl-1,3-thiazol-4-yl.
  • Preferred heterocycles are 1H-imidazol-2-yl, 1,2,3-thiadiazol-4-yl, 1H-pyrazol-3-yl.
  • halogen includes an atom of chlorine, bromine, fluorine, iodine. Usually halogens are chlorine, bromine and fluorine. Preferred halogens are fluorine, bromine and chlorine.
  • hydroxy represents a group of formula —OH.
  • alkoxy represents a group of formula —OR a
  • R a is an alkyl group, as defined above.
  • Preferred alkoxy group is methoxy.
  • aryloxy represents a group of formula —OR b wherein R b is an aryl group, as defined above. Preferred aryloxy group is phenoxy.
  • ester represents a group of formula —COOR c wherein R c is an alkyl group or aryl group, as defined above. Preferred ester group is methoxycarbonyl.
  • amino represents a group of formula —NH 2 .
  • amino acid represents an alkylamino or an arylamino group, wherein the terms “alkyl” and “aryl” are defined as above.
  • cyano represents a group of formula —CN.
  • nitro represents a group of formula —NO,.
  • azido represents a group of formula —N 3 .
  • guanidine represents a group of formula —NHC( ⁇ NH)NH 2 .
  • alkylthio represents a group of formula —SR d wherein R d is an alkyl group, as defined above.
  • Preferred alkylthio group is methylthio.
  • alkylsulfonyl represents a group of formula —S( ⁇ O) 2 R wherein R e is an alkyl group, as defined above.
  • R e is an alkyl group, as defined above.
  • Preferred alkylsulfonyl group is methylsulfonyl.
  • alkylsulfinyl represents a group of formula —S( ⁇ O)R f wherein R f is an alkyl group, as defined above.
  • R f is an alkyl group, as defined above.
  • Preferred alkylsulfinyl group is methylsulfinyl.
  • arylthio represents a group of formula —SR g wherein R g is an aryl group, as defined above.
  • arylsulfonyl represents a group of the formula —S( ⁇ O) 2 R h wherein R h is an aryl group, as defined above.
  • arylsulfinyl represents a group of the formula —S( ⁇ O)R 1 wherein R 1 is an aryl group, as defined above.
  • carbamate represents a group of formula —N(H)C(O)OR j , wherein R j is an alkyl or an aryl, as defined above.
  • carbamate groups are (propoxycarbonyl)amino or (benzyloaxycarbonyl)amino.
  • Preferred carbamate group is (benzyloaxycarbonyl)amino.
  • alkanoylamino represents a group of the formula —NHC( ⁇ O)R k wherein R k is an alkyl group, as defined above.
  • (arylcarbonyl)amino represents a group of the formula —NHC( ⁇ O)R m wherein R m is an aryl group, as defined above.
  • Preferred (arylcarbonyl)amino is benzoylamino.
  • R 1 is hydrogen; C 1-10 alkyl unsubstituted or substituted by halogen, hydroxy, cyano, methylthio, phenyl or 4-chlorophenoxy; hydroxy; CL cycloalkyl; halogen; ester; amido; nitro; cyano; amino; phenyl; alkylthio; alkylsulfonyl; alkylsulfinyl; heterocycle unsubstituted or substituted by alkyl groups; or guanidine.
  • R 1 is hydrogen; methyl; ethyl; i-propyl; n-propyl; cyclopropyl: n-butyl: i-butyl; t-butyl; 1-ethylpropyl; 2,4,4-trimethylpentyl; hydroxymethyl; chloromethyl; trifluoromethyl; 2,2,2-trifluoroethyl; cyanomethyl; 2-(methylthio)ethyl; chloro; bromo; nitro; cyano; amino; aminocarbonyl; methoxycarbonyl; methylthio; methylsulfinyl; methylsulfonyl; phenyl; 2-furyl; 3-furyl; 1H-pyrrol-2-yl; 1-methyl-1H-pyrrol-2-yl; 2-thienyl; 1H-pyrazol-3-yl; 1,2,3-thiadiazol-4-yl or 1H-imidazol-2-yl.
  • R 1 is hydrogen; methyl; ethyl: i-propyl; n-propyl; n-butyl; methylthio; nitro; cyano; amino: chloro or 1H-pyrrol-2-yl. Most preferably, R 1 is hydrogen; methyl; methylthio; nitro; cyano; amino or chloro.
  • R 2 is hydrogen; C 1-4 alkyl unsubstituted or substituted by hydroxy, alkanoylamino or benzoylamino: halogen; ester; cyano; alkyl carbamate; [(N-methoxy-N-methyl)amino]carbonyl.
  • R 2 is hydrogen; methyl; hydroxymethyl; (acetylamino)methyl; (propionylamino)methyl; (benzoylamino)methyl: [(benzyloxy)carbonyl]amino; chloro or cyano. More preferably, R 2 is hydrogen; chloro or cyano.
  • R 3 is hydrogen; C 1-4 alkyl unsubstituted or substituted by hydroxy; halogen; ester or cyano.
  • R 3 is hydrogen; hydroxymethyl; chloro; cyano. More preferably, R 3 is hydrogen or cyano. Most preferred R 3 is hydrogen.
  • R 4 is hydrogen; C 1-4 alkyl unsubstituted or substituted by halogens; C 2-4 alkenyl substituted by halogens or phenyl group unsubstituted or substituted by azido or/and halogens.
  • R 4 is hydrogen; n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 4-chlorophenyl; 4-fluorophenyl; 3,5-difluorophenyl: 3,4-difluorophenyl; 3-chloro-4-fluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl; 3-azido-2,4-difluorophenyl or 3-azido-2,4,6-trifluorophenyl.
  • R 4 is hydrogen; n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 4-chlorophenyl; 4-fluorophenyl; 3,5-difluorophenyl; 3,4-difluorophenyl; 3-chloro-4-fluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl or 3-azido-2,4-difluorophenyl.
  • R 4 is n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 3,5-difluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl or 3-azido-2,4-difluorophenyl.
  • R 4a is hydrogen
  • R 5 is hydrogen
  • R 6 is hydrogen or C 1-10 alkyl unsubstituted or substituted by hydroxy or azido.
  • R 6 is hydrogen or azidomethyl. More preferably R 6 is hydrogen.
  • R 7 is hydrogen
  • R 6 and R 7 are linked to form a cyclopropyl.
  • R 2 and R 3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R 8 is hydrogen
  • R 9 is hydrogen; halogen; C 1-3 alkyl or alkoxy.
  • R 9 is hydrogen; methyl; chloro or methoxy. More preferred R 9 is hydrogen.
  • R 10 is hydrogen; halogen; cyano; C 1-3 alkyl unsubstituted or substituted by halogens; or alkoxy.
  • R 10 is methyl; hydrogen; trifluoromethyl; fluoro; cyano or methoxy. More preferred R 10 is hydrogen; trifluoromethyl; fluoro or cyano.
  • R 11 is hydrogen
  • R 4 , R 4a and R 5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R 12 is hydrogen or halogen.
  • R 12 is hydrogen; chloro or fluoro. More preferred R 12 is hydrogen.
  • R 13 is hydrogen; C 1-3 alkyl; halogen or thiazolyl unsubstituted or substituted by alkyl groups, such as methylthiazolyl.
  • R 13 is hydrogen; chloro; bromo or methyl.
  • Most preferred R 13 is chloro; bromo or methyl.
  • R 14 is hydrogen.
  • R 15 is hydrogen
  • Combinations of one or more of these preferred compound groups are especially preferred.
  • the compounds of formula I, or pharmaceutically acceptable salts thereof are those wherein
  • R 1 is selected from hydrogen; C 1-10 alkyl unsubstituted or substituted by halogen, hydroxy, cyano, methylthio, phenyl or 4-chlorophenoxy; C 3-6 cycloalkyl: halogen; ester; amido; nitro; cyano: amino; phenyl; alkylthio: alkylsulfonyl; alkylsulfinyl; heterocycle unsubstituted or substituted by alkyl group; or guanidine;
  • R 2 is selected from hydrogen; C 1 -4 alkyl unsubstituted or substituted by hydroxy, alkanoylamino or benzoylamino; halogen; ester; cyano; alkyl carbamate or [(N-methoxy-N-methyl)amino]carbonyl.
  • R 3 is selected from hydrogen; C 1-4 alkyl unsubstituted or substituted by hydroxy: halogen; ester or cyano;
  • R 4 is selected from hydrogen; C 1-4 alkyl unsubstituted or substituted by halogens; C 2-4 alkenyl substituted by halogens or phenyl group unsubstituted or substituted by azido or/and halogens;
  • R 4a is hydrogen
  • R 5 is hydrogen
  • R 6 is selected from hydrogen or C 1-10 alkyl unsubstituted or substituted by hydroxy or azido;
  • R 7 is hydrogen
  • R 6 and R 7 can be linked to form a cyclopropyl
  • R 2 and R 3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R 8 is hydrogen
  • R 9 is selected from hydrogen; halogen; C 1-3 alkyl; alkoxy;
  • R 10 is selected from hydrogen; halogen; cyano or C 1-3 alkyl unsubstituted or substituted by halogens; or alkoxy;
  • R 11 is hydrogen
  • R 4 , R 4a and R 5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R 12 is selected from hydrogen or halogen
  • R 13 is selected from hydrogen; C1-3 alkyl; halogen; thiazolyl unsubstituted or substituted by alkyl groups, such as methylthiazolyl;
  • R 14 is hydrogen
  • R 15 is hydrogen
  • the compounds of formula I, or pharmaceutically acceptable salt thereof are those wherein
  • R 1 is selected from hydrogen; methyl; ethyl; i-propyl; n-propyl; cyclopropyl: n-butyl: i-butyl: t-butyl; 1-ethylpropyl; 2,4,4-trimethylpentyl; trifluoromethyl; 2,2,2-trifluoroethyl; hydroxymethyl: chloromethyl; cyanomethyl; 2-(methylthio)ethyl; chloro; bromo; nitro; cyano; amino; aminocarbonyl; methoxycarbonyl; methylthio; methylsulfinyl; methylsulfonyl; phenyl; 2-furyl; 3-furyl; 1H-pyrrol-2-yl; 1-methyl-1H-pyrrol-2-yl; 2-thienyl; 1H-pyrazol-3-yl; 1,2,3-thiadiazol-4-yl; or 1H-imidazol-2-yl;
  • R 2 is selected from hydrogen; methyl; hydroxymethyl; (acetylamino)methyl; (propionylamino)methyl; (benzoylamino)methyl; (benzyloxycarbonyl)amino; chloro; or cyano;
  • R 3 is selected from hydrogen; hydroxymethyl; chloro; cyano;
  • R 2 and R 3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R 8 is hydrogen
  • R 9 is selected from hydrogen; methyl; choro; methoxy;
  • R 10 is selected from methyl; hydrogen; trifluoromethyl; fluoro; cyano; or methoxy;
  • R 11 is hydrogen
  • R 4 is selected from hydrogen; n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 4-chlorophenyl; 4-fluorophenyl; 3,5-difluorophenyl; 3,4-difluorophenyl; 3-chloro-4-fluorophenyl; 2,3,4-trifluorophenyl: 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl; 3-azido-2,4-difluorophenyl; or 3-azido-2,4,6-trifluorophenyl.
  • R 4 , R 4a and R 5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R 12 is selected from hydrogen; chloro; fluoro;
  • R 13 is selected from hydrogen; chloro; bromo; methyl;
  • R 14 is hydrogen
  • R 6 is selected from hydrogen; azidomethyl
  • R 7 is hydrogen
  • R 6 and R 7 are linked to form a cyclopropyl
  • the compounds of formula I, or pharmaceutically acceptable salt thereof are those wherein
  • R 1 is selected from hydrogen; methyl; ethyl; i-propyl; n-propyl; n-butyl; methylthio; nitro; cyano; amino; chloro; or 1H-pyrrol-2-yl;
  • R 2 is selected from hydrogen; chloro; cyano;
  • R 3 is selected from hydrogen; cyano;
  • R 2 and R 3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R 8 is hydrogen
  • R 9 is hydrogen
  • R 10 is selected from hydrogen; trifluoromethyl: fluoro; cyano;
  • R 11 is hydrogen
  • R 4 is selected from hydrogen; n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 4-chlorophenyl; 4-fluorophenyl; 3,5-difluorophenyl; 3,4-difluorophenyl; 3-chloro-4-fluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl; or 3-azido-2,4-difluorophenyl;
  • R 4a is hydrogen
  • R 5 is hydrogen
  • R 4 , R 4a and R 5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R 12 is hydrogen
  • R 13 is selected from methyl; chloro; bromo;
  • R 14 is hydrogen
  • R 6 is hydrogen
  • R 7 is hydrogen
  • the compounds of formula I, or pharmaceutically acceptable salt thereof are those wherein
  • R 1 is selected from hydrogen; methyl; methylthio; nitro; cyano; amino; chloro;
  • R 2 is selected from hydrogen; chloro; cyano;
  • R 3 is hydrogen
  • R 4 is selected from n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 3,5-difluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl: 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl; 3-azido-2,4-difluorophenyl;
  • R 4a is hydrogen
  • R 5 is hydrogen
  • R 4 , R 4a and R 5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R 12 is hydrogen
  • R 13 is selected from chloro; bromo; methyl
  • R 14 is hydrogen
  • R 6 is hydrogen
  • R 7 is hydrogen
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: 1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one; 1-(1H-imidazol-1-ylmethyl)-4-phenylpyrrolidin-2-one; 4-(3-azido-2,4,6-trifluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one; 1-(1H-imidazol-1-ylmethyl)-4-propylpyrrolidin-2-one; ( ⁇ )-4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2- -one; (+)-4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one; 1-[(2-ethy
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: 1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one, 1-(1H-imidazol-1-ylmethyl)-4-phenylpyrrolidin-2-one; 1-(1H-imidazol-1-ylmethyl)-4-propylpyrrolidin-2-one; ( ⁇ )-4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2- -one; (+)-4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one; 1-[(2-ethyl-1H-imidazol-1-yl)methyl]-4-propylpyrrolidin-2-one; 1-[(2-isopropyl-1H-imidazol-1
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: 1-(1H-imidazol-1-ylmethyl)-4-phenylpyrrolidin-2-one: 1-(1H-imidazol-1-ylmethyl)-4-propylpyrrolidin-2-one; ( ⁇ )-4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2- -one; (+)-4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one: 4-(2,2-difluorovinyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-on-e; 4-(3-chlorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one; 1-
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: ( ⁇ )-4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2- -one; (+)-4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one; 4-(3-azido-2,4-difluorophenyl)-1-(1H-imidazol-1-ylmethyl)pyrrolidin-2-one.
  • R 1 is hydrogen or C 1-6 alkyl
  • R 2 is hydrogen or C 1-4 alkyl
  • R 3 is a group of formula —CHR 5 R 6 or a benzyl group
  • R 4 is C 1-8 is alkyl optionally substituted by alkoxycarbonyl, C 3-6 cycloalkyl, aryl or heterocycle;
  • R 5 is C 2-4 alkyl:
  • R 6 is C 2-4 alkyl, amido or —COOR 7 ;
  • R 7 is C 1-4 alkyl
  • R 4 is C 1-8 alkyl optionally substituted by alkoxycarbonyl.
  • R 3 is a group of formula —CHR 5 R 6 then R 4 is C 1-8 alkyl optionally substituted by C 3-6 cycloalkyl, aryl or heterocycle.
  • alkyl is a group which represents saturated, monovalent hydrocarbon radicals having straight (unbranched) or branched moieties, or combinations thereof, and containing 1-8 carbon atoms, preferably 1-6 carbon atoms; more preferably alkyl groups have 1-4 carbon atoms.
  • Alkyl moieties may optionally be substituted by 1 to 5 substituents independently selected from the group consisting of hydroxy, alkoxy, cyano, ethynyl, alkoxycarbonyl, acyl, aryl or heterocycle.
  • Alkyl moieties may be optionally substituted by a cycloalkyl as defined hereafter.
  • Preferred alkyl groups are methyl, cyanomethyl, ethyl, 2-ethoxy-2-oxoethyl, 2-methoxyethyl, n-propyl, 2-oxopropyl, 3-hydroxypropyl, 2-propynyl, n-butyl, i-butyl, n-pentyl, 3-pentyl, n-hexyl, cyclohexylmethyl, benzyl, 2-bromobenzyl, 3-bromobenzyl, 4-bromobenzyl, 3-methoxybenzyl. 3-nitrobenzyl, 3-aminobenzyl, 4-(aminosulfonyl)benzyl, 1-phenylethyl.
  • More preferred alkyl groups are methyl, ethyl, cyanomethyl, 2-methoxyethyl, n-propyl, 3-hydroxypropyl, 2-propynyl, n-butyl, 3-pentyl, n-hexyl, benzyl, 3-bromobenzyl, 3-methoxybenzyl, 3-nitrobenzyl, 3-aminobenzyl, (3,5-dimethylisoxazol-4-yl)methyl or (5-nitro-2-furyl)methyl.
  • Most preferred alkyl groups are methyl, ethyl, 3-methoxybenzyl, 3-nitrobenzyl or (5-nitro-2-furyl)methyl.
  • cycloalkyl represents a monovalent group of 3 to 8, preferably 3 to 6 carbon atoms derived from a saturated cyclic hydrocarbon, which may be substituted by any suitable group including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • Preferred cycloalkyl group is cyclohexyl.
  • aryl as used herein, is defined as a phenyl group optionally substituted by 1 to 4 substituents independently selected from halogen, amino, nitro, alkoxy or aminosulfonyl.
  • Preferred aryl groups are phenyl, 2-bromophenyl, 3-bromophenyl, 4-bromophenyl, 3-methoxyphenyl, 3-nitrophenyl, 3-aminophenyl or 4-(aminosulfonyl)phenyl.
  • phenyl represents an aromatic hydrocarbon group of formula —C 6 H 5 .
  • benzyl group represents a group of formula —CH 2 -aryl.
  • Preferred benzyl groups are benzyl, 2-bromobenzyl, 3-bromobenzyl. 4-bromobenzyl, 3-methoxybenzyl, 3-nitrobenzyl, 3-aminobenzyl or 4-(aminosulfonyl)benzyl. More preferred benzyl groups are benzyl. 3-bromobenzyl, 3-methoxybenzyl, 3-nitrobenzyl or 3-aminobenzyl. Most preferred alkyl groups are 3-methoxybenzyl or 3-nitrobenzyl.
  • halogen represents an atom of fluorine, chlorine, bromine, or iodine. Preferred halogen is bromine.
  • hydroxy represents a group of formula —OH.
  • cyano represents a group of formula —CN.
  • amino represents a group of formula —NH 2 .
  • ethynyl represents a group of formula —C ⁇ CH.
  • alkoxy represents a group of formula —OR a wherein R a is an alkyl group, as defined above. Preferred alkoxy group is methoxy.
  • nitro represents a group of formula —NO 2 .
  • amido represents a group of formula —C( ⁇ O)NH 2 .
  • acyl represents a group of formula —C( ⁇ O)R b wherein R b is an alkyl group, as defined here above.
  • Preferred acyl group is acetyl (—C( ⁇ O)Me).
  • alkoxycarbonyl (or ester) represents a group of formula —COOR c wherein R c is an alkyl group; with the proviso that R c does not represent an alkyl alpha-substituted by hydroxy.
  • Preferred alkoxycarbonyl group is ethoxycarbonyl.
  • heterocycle represents a 5-membered ring containing one or two heteroatoms selected from O or N.
  • the heterocycle may be substituted by one or two C 1-4 alkyl or nitro.
  • Preferred heterocycles are (3,5-dimethylisoxazol-4-yl) or (5-nitro-2-furyl). Most preferred heterocycle is (5-nitro-2-furyl).
  • R 1 is hydrogen or C 1-6 alkyl.
  • R 1 is hydrogen or C 1-6 alkyl optionally substituted by hydroxy, alkoxy, cyano, ethynyl, alkoxycarbonyl or acyl.
  • R 1 is hydrogen, methyl, cyanomethyl.
  • R 1 is hydrogen, methyl, cyanomethyl.
  • R 1 is hydrogen.
  • R 2 is hydrogen or C 1-4 alkyl. Usually R 2 is hydrogen or unsubstituted C 1-4 alkyl. Preferably R 2 is hydrogen, methyl or n-butyl. More preferably. R 2 is methyl.
  • R 3 is a group of formula —CHR S R 6 or a benzyl group.
  • R 3 is 3-pentyl, 1-(aminocarbonyl)propyl.
  • R 3 is 1-(ethoxycarbonyl)propyl.
  • R 4 is C 1-8 alkyl optionally substituted by alkoxycarbonyl, C 3-6 cycloalkyl, aryl or heterocycle.
  • R 4 is C 1-8 alkyl optionally substituted by cyclohexyl, phenyl, bromophenyl, aminophenyl, methoxyphenyl, nitrophenyl, aminosulfonylphenyl, 3,5-dimethylisoxazol-4-yl. 5-nitro-2-furyl or ethoxycarbonyl.
  • R 4 is n-butyl, i-butyl, n-pentyl, n-hexyl, cyclohexylmethyl, benzyl, 2-bromobenzyl, 3-bromobenzyl, 4-bromobenzyl, 3-methoxybenzyl, 3-nitrobenzyl, 3-aminobenzyl, 4-(aminosulfonyl)benzyl, 1-phenylethyl, 2-phenylethyl, (3,5-dimethylisoxazol-4-yl)methyl, (5-nitro-2-furyl)methyl or 1-(ethoxycarbonyl)propyl.
  • R 4 is n-butyl, n-hexyl, benzyl, 3-bromobenzyl, 3-methoxybenzyl, 3-nitrobenzyl, 3-aminobenzyl, (3,5-dimethylisoxazol-4-yl)methyl, (5-nitro-2-furyl)methyl or 1-(ethoxycarbonyl)propyl. Most preferably R 4 is 3-methoxybenzyl, 3-nitrobenzyl or (5-nitro-2-furyl)methyl.
  • R 5 is C 2-4 alkyl. Usually R 5 is unsubstituted C 2-4 4 alkyl. Preferably R 5 is ethyl.
  • R 6 is C 2-4 alkyl, amido or —COOR 7 .
  • R 6 is unsubstituted C 2-4 alkyl, amido or —COOR 7 .
  • R 6 is ethyl, amido or ethoxycarbonyl. Most preferably R 6 is ethoxycarbonyl.
  • R 7 is C 1-4 alkyl. Usually R 7 is unsubstituted C 1-4 alkyl. Preferably, R 7 is ethyl.
  • the compounds are those having formula I, and their enantiomers, diastereoisomers and mixtures thereof (including all possible mixtures of stereoisomers), or pharmaceutically acceptable salts thereof,
  • R 1 is hydrogen, C 1-6 alkyl optionally substituted by hydroxy, alkoxy, cyano, ethynyl, alkoxycarbonyl or acyl;
  • R 2 is hydrogen or unsubstituted C 1-4 alkyl
  • R 3 is a group of formula —CHR 5 R 6 or a benzyl group
  • R 4 is C 1-8 alkyl optionally substituted by cyclohexyl, phenyl, bromophenyl, aminophenyl, methoxyphenyl, nitrophenyl, aminosulfonylphenyl, 3,5-dimethylisoxazol-4-yl, 5-nitro-2-furyl or ethoxycarbonyl;
  • R 5 is unsubstituted C 2-4 alkyl
  • R 6 is unsubstituted C 2-4 alkyl, amido or —COOR 7 ;
  • R 7 is unsubstituted C 1-4 alkyl; with the proviso that when R 1 is hydrogen, R 2 is methyl, R 3 is —CHR 5 R 6 , R 6 is ethoxycarbonyl and R 5 is ethyl, then R 4 is different from n-propyl, i-propyl, n-pentyl, n-heptyl, 3-bromobenzyl, 4-chlorobenzyl, 4-methylbenzyl or 2-phenylethyl.
  • R 4 is C 1-8 alkyl optionally substituted by alkoxycarbonyl.
  • R 4 is C 1-8 alkyl optionally substituted by C 3-6 cycloalkyl, aryl or heterocycle.
  • R 1 is hydrogen, methyl, cyanomethyl, 2-ethoxy-2-oxoethyl, 2-methoxyethyl, n-propyl, 2-oxopropyl, 3-hydroxypropyl, 2-propynyl, n-pentyl or n-hexyl;
  • R 2 is hydrogen, methyl or n-butyl
  • R 3 is 3-pentyl. 1-(aminocarbonyl)propyl, 1-(ethoxycarbonyl)propyl or 3-bromobenzyl;
  • R 4 is n-butyl, i-butyl, n-pentyl, n-hexyl, cyclohexylmethyl, benzyl, 2-bromobenzyl, 3-bromobenzyl, 4-bromobenzyl, 3-methoxybenzyl, 3-nitrobenzyl, 3-aminobenzyl, 4-(aminosulfonyl)benzyl, 1-phenylethyl, 2-phenylethyl, (3,5-dimethylisoxazol-4-yl)methyl, (5-nitro-2-furyl)methyl or 1-(ethoxycarbonyl)propyl; with the proviso that when R L is hydrogen, R 2 is methyl and R 3 is 1-(ethoxycarbonyl)propyl, then R 4 is different from n-pentyl, 3-bromobenzyl or 2-phenylethyl.
  • R 4 is C 1-8 alkyl optionally substituted by alkoxycarbonyl.
  • R 4 is different from 1-(ethoxycarbonyl)propyl.
  • R 1 is hydrogen, methyl, cyanomethyl, 2-methoxyethyl, n-propyl, 3-hydroxypropyl or 2-propynyl;
  • R 2 is methyl
  • R 3 is 3-pentyl, 1-(aminocarbonyl)propyl, 1-(ethoxycarbonyl)propyl or 3-bromobenzyl;
  • R 4 is n-butyl, n-hexyl, benzyl, 3-bromobenzyl, 3-methoxybenzyl, 3-nitrobenzyl, 3-aminobenzyl, (3,5-dimethylisoxazol-4-yl)methyl, (5-nitro-2-furyl)methyl or 1-(ethoxycarbonyl)propyl;
  • R 4 is different from 3-bromobenzyl.
  • R 4 is 1-(ethoxycarbonyl)propyl
  • R 4 is different from 1-(ethoxycarbonyl)propyl
  • R 1 is hydrogen; R 2 is methyl; R 3 is 1-(ethoxycarbonyl)propyl; and R 4 is 3-methoxybenzyl, 3-nitrobenzyl or (5-nitro-2-furyl)methyl.
  • a further embodiment consists in compounds wherein R 2 is methyl, R 3 is a group of formula —CHR 5 R 6 with R 5 being C 2-4 alkyl. R 6 being amido or —COOR 7 and R 7 being methyl or ethyl.
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: ethyl 2-[(7-benzyl-1,3-dimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)thio]butanoate; ethyl 2- ⁇ [7-(3-bromobenzyl)-1-(2-ethoxy-2-oxoethyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]thio ⁇ butanoate; ethyl 2- ⁇ [7-(3-bromobenzyl)-1-(2-methoxyethyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]thio ⁇ butanoate; ethyl 2- ⁇ [7-(3-bromobenzyl)-2
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: ethyl 2-[(7-benzyl-1,3-dimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)thio]butanoate; ethyl 2- ⁇ [7-(3-bromobenzyl)-1-(2-methoxyethyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]thio ⁇ ) butanoate; ethyl 2- ⁇ [7-(3-bromobenzyl)-1,3-dimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]thio ⁇ butanoate; ethyl 2-([7-(3-bromobenzyl)-1-(cyanomethyl)-3-methyl-2,6
  • compounds useful in the methods and compositions of this invention are selected from the group consisting of: ethyl 2- ⁇ [7-(3-methoxybenzyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]thio ⁇ butanoate; ethyl 2- ⁇ [3-methyl-7-(3-nitrobenzyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]thio ⁇ butanoate; and ethyl 2-( ⁇ 3-methyl-7-[(5-nitro-2-furyl)methyl]-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl) ⁇ thio)butanoate.
  • the compounds are those having formula II, their enantiomers, diastereoisomers and mixtures thereof (including all possible mixtures of stereoisomers), or pharmaceutically acceptable salts:
  • R.sup.1 is hydrogen or C.sub.1-6 alkyl:
  • R.sup.2 is hydrogen or C.sub. 1-4 alkyl;
  • R.sup.3 is a group of formula —CHR.sup.5R.sup.6 or a benzyl group;
  • R.sup.4 is C.sub.1-8 alkyl optionally substituted by alkoxycarbonyl, C.sub.3-6 cycloalkyl, aryl or heterocycle;
  • R.sup.5 is hydrogen or C.sub. 1-4 alkyl;
  • R.sup.6 is C.sub.1-4 alkyl, amido or —COOR.sup.7;
  • R.sup.7 is C.sub.1-4 alkyl:
  • R.sup.3 is a benzyl group
  • R.sup.4 is C.sub.1-8 alkyl optionally substituted by alkoxycarbonyl.
  • R.sup.3 is a group of formula —CHR.sup.5R.sup.6, then R.sup.4 is C.sub. 1-8 alkyl optionally substituted by C.sub.3-6 cycloalkyl, aryl or heterocycle.
  • the compounds are those compounds of formula II, their enantiomers, diastereoisomers and mixtures thereof (including all possible mixtures of stereoisomers), or pharmaceutically acceptable salts
  • R.sup.1 is hydrogen or C.sub. 1-6 alkyl
  • R.sup.2 is hydrogen or C.sub. 1-4 alkyl
  • R.sup.3 is a group of formula —CHR.sup.5R.sup.6 or a benzyl group
  • R.sup.4 is C.sub.1-8 alkyl optionally substituted by alkoxycarbonyl, C.sub.3-6 cycloalkyl, aryl or heterocycle
  • R.sup.5 is hydrogen or C.sub.1-4 alkyl
  • R.sup.6 is C.sub.1-4 alkyl, amido or —COOR.sup.7
  • R.sup.7 is C.sub.1-4 alkyl.
  • the compounds are compounds of formula IT selected from ethyl 2-[(7-heptyl-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)thio]but-anoate; 7-(3-bromobenzyl)-3-methyl-8-(propylthio)-3,7-dihydro-1H-purine-2,-6-dione; ethyl 2-[(3-methyl-2,6-dioxo-7-pentyl-2,3,6,7-tetrahydro-1H-purin-8-yl)thio]but-anoate; ethyl 2-[7-(3-bromobenzyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl-]thiol butanoate; ethyl 2-[(3-methyl-2,6-dioxo-7-prop
  • the compounds are compounds of formula I, their enantiomers, diastereoisomers and mixtures thereof (including all possible mixtures of stereoisomers), or pharmaceutically acceptable salts
  • R.sup.1 is hydrogen or C.sub. 1-6 alkyl
  • R.sup.2 is hydrogen or C.sub.1-4 alkyl
  • R.sup.3 is a group of formula —CHR.sup.5R.sup.6 or a benzyl group
  • R.sup.4 is C.sub.1-8 alkyl optionally substituted by alkoxycarbonyl, C.sub.3-6 cycloalkyl, aryl or heterocycle
  • R.sup.5 is C.sub.2-4 alkyl
  • R.sup.6 is C.sub.2-4 alkyl, amido or —COOR.sup.7
  • R.sup.7 is C.sub.1-4 alkyl
  • the compounds are compounds having formula II, their enantiomers, diastereoisomers and mixtures thereof (including all possible mixtures of stereoisomers), or pharmaceutically acceptable salts thereof,
  • R.sup.1 is hydrogen or C.sub. 1-6 alkyl
  • R.sup.2 is hydrogen or C.sub.1-4 alkyl
  • R.sup.3 is a group of formula —CHR.sup.5R.sup.6 or a benzyl group
  • R.sup.4 is C.sub. 1-8 alkyl optionally substituted by alkoxycarbonyl, C.sub.3-6 cycloalkyl, aryl or heterocycle
  • R.sup.5 is hydrogen or C.sub. 1-4 alkyl
  • R.sup.6 is C.sub.1-4 alkyl, amido or —COOR.sup.7
  • R.sup.7 is C.sub.1-4 alkyl:
  • a chemical composition that includes a LEV derivative of Formula 1 or Formula 2 is disclosed.
  • n of Formula 2 and L, X, and Y of Formulas 1 and 2 are defined as follows: a) n is an integer with a value of 0 to 8; b) L is one of the group consisting of CH 2 , CO, NHCO, NHCOO, CONH, NH, O, or S, and combinations thereof; c) X is an end group, an aromatic group, an aryl group, or a saturated, unsaturated, substituted, unsubstituted, straight chain, or branched chain aliphatic group having from 1 to 10 carbon and/or hetero chain atoms, the hetero chain atoms being selected from the group consisting of oxygen, nitrogen, sulfur, or phosphorus, and combinations thereof; and d) Y is optional and if present is one of a functional group selected from group consisting of alcohol amine, amide, carboxylic acid, aldehyde, ester, iminoester, isocyanate, isothiocyanate, anhydride, thiol,
  • the operative group of Z is selected from the group consisting of detectable labels, antigenic carriers, coupling agents, end groups, proteins, lipoproteins, glycoproteins, polypeptides, polysaccharides, nucleic acids, polynucleotides, teichoic acids, radioactive isotopes, enzymes, enzyme fragments, enzyme donor fragments, enzyme acceptor fragments, enzyme substrates, enzyme inhibitors, coenzymes, fluorescent moieties, phosphorescent moieties, anti-stokes up-regulating moieties, chemiluminescent moieties, luminescent moieties, dyes, sensitizers, particles, microparticles, magnetic particles, solid supports, liposomes, ligands, receptors, hapten radioactive isotopes, and combinations thereof.
  • the present invention provides a compound of Formula I:
  • each Z is independently selected from hydrogen and deuterium; R1 is an n-propyl group having zero to seven deuterium atoms; R2 is an ethyl group having zero to five deuterium atoms, and when each R has zero deuterium atoms, at least one Z is deuterium.
  • R1 is selected from CD3CH2CH2-, CD3CD2CH2-, CD3CH2CD2-, CH3CH2CD2-, CH3CD2CD2-, CD3CD2CD2- or CH3CH2CH2-.
  • R1 is CD3CD2CD2- or
  • CD3CD2CH2- CD3CD2CH2-.
  • Z1 and Z2 are both hydrogen.
  • Z1 and Z2 are both deuterium.
  • R2 is selected from CH3CH2-, CD3CH2-, CH3CD2-, or CD3CD2-. In a more specific embodiment, R2 is selected from CH3CH2- or CD3CD2-. In one aspect of these embodiments. Z1 and Z2 are both hydrogen. In another aspect of these embodiments, Z1 I and Z2 are both deuterium.
  • R1 is CD3CH2CH2-, CD3CD2CH2-, CD3CH2CD2-, CH3CH2CD2-, CH3CD2CD2-, CD3CD2CD2- or CH3CH2CH2-; and R2 is selected from CH3CH2-, CD3CH2-, CH3CD2-, or CD3CD2-.
  • R2 is CH3CH2- or CD3CD2-.
  • R1 is CD3CD2CD2- or CD3CD2CH2-; and R2 is selected from CH3CH2-, CD3CH2-, CH3CD2-, or CD3CD2-.
  • R2 is CH3CH2— or CD3CD2-.
  • Examples of specific compounds of this invention include the following:
  • the compounds of the present invention are those covered by formula (I), their diastereomers and mixtures, or a pharmaceutically acceptable salt thereof.
  • R1 is hydrogen, substituted or unsubstituted C1-12 alkyl, substituted or unsubstituted aryl or substituted or unsubstituted 3-8 membered heterocycle.
  • R2 is hydrogen.
  • R1 and R2 may be linked together in such a way to form a C3-6 cycloalkyl.
  • R3 is either
  • R4 in formula (I) is selected from the group comprising or consisting of hydrogen; C1-12 alkyl optionally substituted by halogen, C1-4 alkoxy, C1-4 alkylthio, azido, nitrooxy or an aryl; C2-12 alkenyl optionally substituted by halogen; C2-12 alkynyl optionally substituted by halogen; azido; alkoxycarbonylamino; arylsulfonyloxy; a substituted or unsubstituted aryl; or a 3-8 membered substituted or unsubstituted heterocycle;
  • R4 is hydrogen; or R4 is C1-12 alkyl or a C1-6 alkyl, optionally substituted by halogen, C1-4 alkoxy, C1-4 alkylthio, azido or nitrooxy; or R4 is C2-12 alkenyl or a C1-6 alkenyl optionally substituted by halogen; or R4 is C2-12 alkynyl or a C1-6 alkynyl optionally substituted by halogen; or R4 is alkoxycarbonylamino.
  • R5 is hydrogen
  • R4 may form together with R5 and the 2-oxo-1-pyrrolidine ring a 1,3-dihydro-2H-indol-2-one ring of the following structure:
  • R6 is hydrogen or halogen.
  • R7 in formula (I) is selected from the group comprising or consisting of hydrogen; nitro; halogen; heterocycle; amino; aryl; C1-12 alkyl optionally substituted by at least one halogen; or C1-12 alkoxy optionally substituted by at least one halogen.
  • R8 in formula (I) is selected from the group comprising or consisting of hydrogen. C1-12 alkyl optionally substituted by halogen, or halogen.
  • R9 in formula (I) is selected from the group comprising or consisting of hydrogen, C1-12 alkyl optionally substituted by halogen, or halogen.
  • a further aspect of the present invention consists in compounds of formula (I) wherein
  • R1 and R2 are both hydrogen.
  • R3 is:
  • R3 is:
  • R4 is n-propyl, 2,2,2-trifluoroethyl, 2-chloro-2,2-difluoroethyl, 2 bromo-2,2-difluoroethyl, 2,2-difluorovinyl.
  • R4 is phenyl, 2,3,5-trifluorophenyl or 3-chloro-4-fluorophenyl.
  • R5 is hydrogen
  • a further embodiment of the present invention consists in compounds of formula (I) wherein R4 forms together with R5a 1,3-dihydro-2H-indol-2-one ring
  • R6 is hydrogen; R7 is chlorine; R8 is hydrogen; R9 is hydrogen.
  • a further embodiment of the present invention consists in compounds of formula (I) wherein R3 is a substituted or unsubstituted heterocycle linked to the rest of the molecule via one of its C atoms and is selected from the group consisting of:
  • R3 is a heterocycle linked to the rest of the molecule via one of its C atoms and is selected from the group consisting of:
  • Said heterocycles are optionally substituted by e.g. a methyl, n-propyl, trifluoromethyl, cyclopropyl, bromine, chlorine, fluorine, iodine, methoxy, ethoxy, propoxy, isopropoxy, cyclopropyloxy, cyclopropylmethoxy, cyclobutylmethoxy, amino, methylamino, cyclopropylamino, cyclobutylamino, 1-pyrrolidinyl, cyano, phenyl, benzyl or 3-thienyl.
  • R3 is a heterocycle linked to the rest of the molecule via one of its C atoms and is selected from the group consisting of: 6-chloro-2-cyclopropylimidazo[1,2-b]pyridazin-3-yl, 6-(cyclopropyloxy)-2-(trifluoromethyl)imidazo[1,2-b]pyridazin-3-yl. 6-propoxy-2-(trifluoromethyl)imidazo[1,2-b]pyridazin-3-yl.
  • a further embodiment of the present invention consists in compounds of formula (I) wherein R3 is a heterocycle linked to the rest of the molecule via one of its C atoms and is a substituted or unsubstituted imidazo[1,2-a]pyridin-3-yl.
  • Said imidazo[1,2-a]pyridin-3-yl is optionally substituted by e.g. a methyl, cyclopropyl, bromine, chlorine, fluorine, iodine.
  • R3 is a heterocycle linked to the rest of the molecule via one of its C atoms and is selected from the group consisting of: imidazo[1,2-a]pyridin-3-yl, 6-methylimidazo[1,2-a]pyridin-3-yl, 2-chloroimidazo[1,2-a]pyridin-3-yl.
  • a further embodiment of the present invention consists in compounds of formula (I) wherein R3 is a substituted or unsubstituted heterocycle linked to the rest of the molecule via one of its N atoms and is selected from the group consisting of:
  • a specific further embodiment of the present invention consists in compounds of formula (I) wherein R3 is a heterocycle linked to the rest of the molecule via one of its N atoms and is selected from the group consisting of:
  • Said heterocycles may optionally be substituted by trifluoromethyl, cyclopropyl, bromine, chlorine, fluorine, methoxy or cyano.
  • R3 is a heterocycle linked to the rest of the molecule via one of its C atoms and is selected from the group consisting of 6-bromo-2-chloro-3H-imidazo[4,5-b]pyridin-3-yl, 6-bromo-2-cyclopropyl-3H-imidazo[4,5-b]pyridin-3-yl, 1H-pyrrolo[3,2-b]pyridin-1-yl, 2,5-dichloro-1H-pyrrol-1-yl, 2-chloro-5-methoxy-1H-benzimidazol-1-yl, 5-bromo-2-chloro-1H-benzimidazol-1-yl or 2,5-dichloro-1H-benzimidazol-1-yl.
  • a further embodiment of the present invention consists in compounds of formula (I) wherein R1, R2 and R5 are hydrogen.
  • R4 is a C1-6 alkyl optionally substituted by halogen, a C2-6 alkenyl optionally substituted by halogen or C2-12 alkynyl optionally substituted by halogen.
  • R3 is selected from the group consisting of;
  • a further embodiment of the present invention consists in compounds of formula (I) wherein R1, R2 and R5 are hydrogen.
  • R4 is a C1-6 alkyl optionally substituted by halogen, a C2-6 alkenyl optionally substituted by halogen or C2-12 alkynyl optionally substituted by halogen.
  • R3 is selected from the group consisting of
  • a further embodiment of the invention consists in compounds of formula (I), their diastereomers and mixtures, or a pharmaceutically acceptable salt thereof.
  • R1, R2 and R5 are hydrogen.
  • R3 is a substituted or unsubstituted heterocycle linked to the rest of the molecule via one of its C atoms, said heterocycle is selected from the group consisting of:
  • imidazo[1,2-a]pyridin-3-yl imidazo[1,2-a]pyrimidin-3-yl; imidazo[1,2-b]pyridazin-3-yl; 1H-imidazol-4-yl; 1H-imidazol-5-yl;
  • R4 is a substituted or unsubstituted phenyl moiety:
  • a further embodiment of the present invention consists in compounds of formula (I) wherein R1 is hydrogen or C1-12 alkyl;
  • R2 is hydrogen;
  • R3 is an aromatic 5-membered heterocycle linked to the rest of the molecule via one of its C atoms;
  • R4 is hydrogen, C1-12 alkyl or aryl;
  • R5 is hydrogen:
  • R4 can form together with R5 and the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R6 is hydrogen or halogen:
  • R4 may not be hydrogen when R3 is substituted 1H-pyrazol-5-yl. Also this embodiment does not comprise 5-(2′-oxo-1′-pyrrolidinyl)methyl-1,3,4-tricarbomethoxy-pyrazole which is disclosed in A. Padwa et al J. Org. Chem. 2000, 65, 5223-5232 without any biological activity though.
  • R3 is an aromatic 5-membered heterocycle linked to the rest of the molecule via one of its C atoms
  • specific moieties R3 may be selected from 1,3-thiazol-5-yl, 1H-imidazol-4-yl, 1H-imidazol-5-yl, 1H-pyrazol-4-yl, 1H-pyrazol-5-yl, 2-oxo-2,3-dihydro-1,3-thiazol-5-yl, each of them being optionally substituted by 1 to 3 substituents independently selected from methyl, chlorine, bromine, amino, methylamino, dimethylamino, (2-oxo-4-propyl-pyrrolidin-1-yl)methyl, 1-pyrrolidinyl, amido, cyano, methoxy, phenyl, 4-methylphenyl-sulfonyl, benzyl or 2-(benzylamino)-2-oxoethyl.
  • more specific moieties R3 are selected from 2-(methylamino)-1,3-thiazol-5-yl; 2-pyrrolidin-1-yl-1,3-thiazol-5-yl: 5-bromo-1H-imidazol-4-yl; 5-chloro-1H-imidazol-4-yl; 1H-imidazol-5-yl; 1-methyl-1H-imidazol-5-yl; 4-bromo-1-methyl-1H-imidazol-5-yl; 4-chloro-1H-imidazol-5-yl; 4-chloro-1-methyl-1H-imidazol-5-yl: 4-cyano-1-methyl-1H-imidazol-5-yl; 1H-pyrazol-4-yl; 3,5-dimethyl-1H-pyrazol-4-yl; 3-methyl-1H-pyrazol-4-yl.
  • most specific moieties R3 are selected from 5-bromo-1H-imidazol-4-yl; 5-chloro-1H-imidazol-4-yl; 1H-imidazol-5-yl; 4-bromo-1-methyl-1H-imidazol-5-yl; 4-chloro-1-methyl-1H-imidazol-5-yl: 1H-pyrazol-4-yl.
  • a specific moiety R1 is selected from hydrogen or ethyl.
  • a specific moiety R4 is selected from hydrogen, n-propyl, 2,3,5-trifluorophenyl or phenyl.
  • a further embodiment of the present invention consists in compounds having the specific formula (Ia).
  • R10 is hydrogen; halogen; C1-4 alkyl optionally substituted by at least one halogen; C1-4 alkoxy; methoxycarbonyl; nitro; amino; alkylamino; amido; or alkanoyl-amino.
  • R10 is hydrogen.
  • R11 is hydrogen; halogen: C1-4 alkyl optionally substituted by at least one halogen; C1-4 alkoxy; methoxycarbonyl; nitro: amino; alkylamino; amido; or alkanoylamino.
  • R11 is hydrogen.
  • R4 is C1-4 alkyl optionally substituted by at least one halogen; or C2-4 alkenyl optionally substituted by at least one halogen.
  • R4 is n-propyl.
  • a specific embodiment relates to an embodiment wherein R10 is selected from hydrogen; methyl; fluorine; chlorine; bromine; methoxy; methoxycarbonyl; nitro; or trifluoromethyl, while R11 is selected from hydrogen; methyl; fluorine; chlorine; bromine; methoxy; methoxycarbonyl; nitro; or trifluoromethyl; and R3 is n-propyl.
  • the present invention relates to the novel compound (S)-alpha-ethyl-2-oxo-1-pyrrolidineacetamide.
  • the present invention relates to the novel compound, (R)-alpha-ethyl-2-oxo-1-pyrrolidineacetamide
  • R1, R2, R3 and R4 which may be the same or different independently represent hydrogen, C1-6 alkyl, phenyl or phenyl substituted by one or more halogen, hydroxyl, nitro, amino, C1-6 alkyl or C1-C6 alkoxy groups;
  • R5 and R6 independently represent hydrogen, C1-C6 alkyl or C3-C6 cycloalkyl, or R5 and R6 together with the nitrogen form a C 4-6 N heterocycle:
  • m represents an integer from 1-2; and
  • n represents an integer from 1-3; provided that, two of the substituents R1, R2, R3 and R4 independently represent phenyl or substituted phenyl and the other two independently represent hydrogen or C1-6 alkyl; or a pharmaceutically acceptable acid addition salt thereof.
  • Pharmaceutically acceptable acid addition salts of the compounds of formula I include salts of mineral acids, for example, hydrohalic acids, e.g. hydrochloric or hydrobromic; or organic acids, e.g. formic, acetic or lactic acids.
  • the acid may be polybasic, for example sulphuric, fumaric, maleic or citric acid.
  • This invention also relates to all stereoisomeric forms and optical enantiomeric forms of the compounds of formula I.
  • alkyl groups which R1, R2, R3, R4, R5 and R6 may represent include methyl, ethyl, propyl, isopropyl, n-butyl, iso-butyl and s-butyl;
  • cycloalkyl groups which R5 and R6 may represent include cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl; C1-6 alkoxy groups include methoxy, ethoxy and propoxy; halogen groups include fluorine, chlorine, bromine or iodine;
  • R1 is hydrogen, phenyl or substituted phenyl, preferably phenyl
  • R2 is hydrogen, phenyl or substituted phenyl, preferably phenyl
  • R3 is hydrogen, phenyl or substituted phenyl, preferably hydrogen:
  • R4 is hydrogen, phenyl or substituted phenyl, preferably hydrogen;
  • R5 is hydrogen, C1-3 alkyl or cyclopropyl, preferably hydrogen or methyl;
  • R6 is hydrogen, C1-3 alkyl or cyclopropyl, preferably hydrogen or methyl;
  • m represents an integer from 1-2 preferably 2;
  • n represents an integer from 1-2, preferably 1.
  • the invention therefore provides a compound having the formula I or a pharmaceutically acceptable salt thereof,
  • RI is hydrogen, CI-20 alkyl, C3 23 cycloalkyl, halogen, hydroxy, alkoxy, aryloxy, ester, amido, cyano, nitro, amino, guanidine, amino derivative, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkylsulfinyl, arylsulfinyl, aryl or heterocycle;
  • R2 is hydrogen, C1 20 alkyl, alkoxy, amino, halogen, hydroxy, ester, amido, nitro, cyano, carbamate, or aryl;
  • R3 is hydrogen, C1 20 alkyl, alkoxy, amino, halogen, hydroxy, ester, amido, nitro, cyano, carbamate, or aryl; or R2 and R3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R4 is hydrogen, C1-20 alkyl, C2-12 alkenyl, C2-12 alkynyl, aryl, azido, alkoxycarbonylamino, arylsulfonyloxy or heterocycle;
  • R4a is hydrogen or C1-20 alkyl; or R4 and R4a can form together a C3-8 cycloalkyl;
  • R5 is hydrogen; or R4, R4a and R5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R6 is hydrogen or C1 20 alkyl; R7 is hydrogen; or R6 and R7 are linked together to form a C3-6 cycloalkyl;
  • R8 is hydrogen, halogen, nitro, cyano, C1 20 alkyl or alkoxy;
  • R9 is hydrogen, C1-20 alkyl, halogen, hydroxy, alkoxy, aryloxy, ester, amido, cyano, nitro, amino, amino derivative, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkylsulfinyl or arylsulfinyl;
  • RIO is hydrogen, C1 20 alkyl, halogen, hydroxy, alkoxy, aryloxy, ester, amido, cyano, nitro, amino, amino derivative, alkylthio, arylthio, alkylsulfonyl, arylsulfonyl, alkylsulf
  • N represents a group of formula
  • the asterisk * indicates the point of attachment of the substituents.
  • the invention concerns a compound having the formula I, their tautomers, geometrical isomers (including cis and trans, Z and E isomers), enantiomers, diastereoisomers and mixtures thereof (including all possible mixtures of stereoisomers), or pharmaceutically acceptable salts thereof,
  • RI is hydrogen, C1-20 alkyl, C3-8 cycloalkyl, halogen, hydroxy, ester, amido, cyano, nitro, amino, guanidine, alkylthio, alkylsulfonyl, alkylsulfinyl, aryl or heterocycle:
  • R2 is hydrogen, C1 20 alkyl, halogen, cyano, ester, carbamate or amido;
  • R3 is hydrogen, cyano, C1 20 alkyl, halogen or ester, or R2 and R3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R4a is hydrogen
  • R5 is hydrogen: or R4, R4a and R5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R6 is hydrogen or C1 20 alkyl; R7 is hydrogen; or R6 and R7 are linked together to form a C3-6 cycloalkyl; R8 is hydrogen; R9 is hydrogen, C 1-20 alkyl, halogen or alkoxy; RIO is hydrogen, C1 20 alkyl, halogen or cyano; R11 is hydrogen; R12 is hydrogen or halogen; R13 is hydrogen, halogen, heterocycle or C1 20 alkyl; R14 is hydrogen; R15 is hydrogen; with the proviso that R4 is different from hydrogen when
  • alkyl represents saturated, monovalent hydrocarbon radicals having straight (unbranched) or branched or cyclic or combinations thereof and containing 1-20 carbon atoms, preferably 1-10 carbon atoms, more preferably 1-4 carbon atoms; most preferred alkyl groups have 1-3 carbon atoms.
  • Alkyl moieties may optionally be substituted by 1 to 5 substituents independently selected from the group consisting of halogen, hydroxy, cyano, azido, aryloxy, alkoxy, alkylthio, alkanoylamino, arylcarbonylamino, aminocarbonyl, methylaminocarbonyl, dimethylaminocarbonyl or aryl.
  • alkyl groups are methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, 1-ethylpropyl, n-heptyl, 2,4,4-trimethylpentyl, n-decyl, chloromethyl, trifluoromethyl, 2-bromo-2,2-difluoroethyl, 2,2,2-trifluoroethyl, 3,3,3-trifluoropropyl, hydroxymethyl, cyanomethyl, azidomethyl, (acetylamino) methyl, (propionylamino) methyl, (benzoylamino) methyl, (4-chlorophenoxy)methyl, benzyl, 2-phenylethyl or 2-(methylthio) ethyl.
  • Preferred alkyl groups are methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, 1-ethylpropyl, 2,4,4-trimethylpentyl, chloromethyl, trifluoromethyl, 2,2,2-trifluoroethyl, hydroxymethyl, cyanomethyl, azidomethyl, (acetylamino) methyl, (propionylamino) methyl, (benzoylarino) methyl or 2-(methylthio) ethyl.
  • More preferred alkyl groups are methyl, ethyl, n-propyl, i-propyl, n-butyl, azidomethyl or trifluoromethyl. Most preferred alkyl groups are methyl or n-propyl.
  • cycloalkyl represents a monovalent group of 3 to 8 carbon atoms, usually 3-6 carbon atoms derived from a saturated cyclic hydrocarbon, which may be substituted by any suitable group including but not limited to one or more moieties selected from groups as described above for the alkyl groups.
  • Preferred cycloalkyl groups are cyclopropyl and cyclohexyl.
  • alkenyl represents straight, branched or cyclic unsaturated hydrocarbon radicals or combinations thereof having at least one carbon-carbon double bond, containing 2-12 carbon atoms, preferably usually 2-4 carbon atoms.
  • Alkenyl groups are being optionally substituted with any suitable group, including but not limited to one or more moities selected from groups as described above for the alkyl groups.
  • an alkenyl group is ethenyl (vinyl) optionally substituted by 1 to 3 halogens.
  • Preferred alkenyl group in the present case, is 2,2-difluorovinyl.
  • alkynyl represents straight, branched or cyclic hydrocarbon radicals or combinations thereof containing at least one carbon-carbon triple bond, containing 2-12 carbon atoms, preferably 2-6 carbon atoms, and being optionally substituted by any suitable group, including but not limited to one or more moities selected from groups as described above for the alkyl groups.
  • an alkynyl group is a halogenoalkynyl group (haloalkynyl group).
  • Groups qualified by prefixes such as “s”, “i”, “t” and the like (e.g. “i-propyl”, “s-butyl”) are branched derivatives.
  • aryl as used herein, is defined as phenyl optionally substituted by 1 to 4 substituents independently selected from halogen, cyano, alkoxy, alkylthio, C1-3 alkyl or azido, preferably halogen or azido.
  • aryl groups in the present case are phenyl, 3-chlorophenyl, 3-fluorophenyl, 4-chlorophenyl, 4-fluorophenyl, 3,4-difluorophenyl, 3,5-difluorophenyl, 3-chloro-4-fluorophenyl, 2,3,4-trifluorophenyl, 2,4,5-trifluorophenyl, 2,3,5-trifluorophenyl, 3,4,5-trifluorophenyl, 3-azido-2,4-difluorophenyl or 3-azido-2,4,6-trifluorophenyl.
  • aryl groups are phenyl, 3-chlorophenyl.
  • 3-fluorophenyl 4-chlorophenyl, 4-fluorophenyl, 3,4-difluorophenyl, 3,5-difluorophenyl, 3-chloro-4-fluorophenyl, 2,3,4-trifluorophenyl, 2,4,5-trifluorophenyl, 2,3,5-trifluorophenyl, 3,4,5-trifluorophenyl or 3-azido-2,4-difluorophenyl.
  • Most preferred aryl groups are phenyl, 3-chlorophenyl.
  • heterocycle is defined as including an aromatic or non aromatic cycloalkyl moiety as defined above, having at least one O, S and/or N atom interrupting the carbocyclic ring structure.
  • Heterocyclic ring moities can be optionally substituted by alkyl groups or halogens and optionally, one of the carbon of the carbocyclic ring structure may be replaced by a carbonyl.
  • heterocycles are 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-furyl, 3-furyl, 2-thienyl, 3-thienyl, 2-tetrahydrofuranyl, 1H-pyrrol-2-yl, 1-methyl-1H-pyrrol-2-yl, 1H-pyrazol-2-yl, 1H-pyrazol-3-yl.
  • Preferred heterocycles are 1H-imidazol-2-yl, 1,2,3-thiadiazol-4-yl, 1H-pyrazol-3-yl, 2-furyl, 3-furyl, 2-thienyl, 1-methyl-1H-pyrrol-2-yl, 1H-pyrrol-2-yl.
  • halogen includes an atom of chlorine, bromine, fluorine, iodine. Usually halogens are chlorine, bromine and fluorine. Preferred halogens are fluorine, bromine and chlorine.
  • hydroxy represents a group of formula —OH.
  • alkoxy represents a group of formula —ORa wherein Ra is an alkyl group, as defined above. Preferred alkoxy group is methoxy.
  • aryloxy represents a group of formula —ORb wherein Rb is an aryl group, as defined above. Preferred aryloxy group is phenoxy.
  • ester represents a group of formula —COORC wherein Rc is an alkyl group or aryl group, as defined above. Preferred ester group is methoxycarbonyl.
  • amino represents a group of formula —NH2.
  • amino acid represents an alkylamino or an arylamino group, wherein the terms “alkyl” and “aryl” are defined as above.
  • cyano represents a group of formula —CN.
  • nitro represents a group of formula —NO2.
  • guanidine represents a group of formula —NHC( ⁇ NH) NH2.
  • alkylthio represents a group of formula —SRd wherein Rd is an alkyl group, as defined above.
  • Rd is an alkyl group, as defined above.
  • One alkylthio group is methylthio.
  • alkylsulfonyl represents a group of formula —S( ⁇ O) 2Re wherein Re is an alkyl group, as defined above.
  • Re is an alkyl group, as defined above.
  • One alkylsulfonyl group is methylsulfonyl.
  • alkylsulfinyl represents a group of formula —S( ⁇ O)Rf wherein Rf is an alkyl group, as defined above.
  • Rf is an alkyl group, as defined above.
  • One alkylsulfinyl group is methylsulfinyl.
  • arylthio represents a group of formula —SRg wherein Rg is an aryl group, as defined above.
  • arylsulfonyl represents a group of the formula —S( ⁇ O) 2Rh wherein Rh is an aryl group, as defined above.
  • arylsulfinyl represents a group of the formula —S( ⁇ O) Ri wherein Ri is an aryl group, as defined above.
  • carbamate represents a group of formula —N(H)C(O) OR1, wherein Ri is an alkyl or an aryl, as defined above.
  • carbamate groups are (propoxycarbonyl)amino or (benzyloaxycarbonyl)amino.
  • One carbamate group is (benzyloaxycarbonyl)amino.
  • alkanoylamino represents a group of the formula —NHC ( ⁇ O) Rk wherein Rk is an alkyl group, as defined above.
  • (arylcarbonyl)amino represents a group of the formula —NHC( ⁇ O)Rm wherein Rm is an aryl group, as defined above.
  • One (arylcarbonyl)amino is benzoylamino.
  • RI is hydrogen; C1 lo alkyl unsubstituted or substituted by halogen, hydroxy, cyano, methylthio, phenyl or 4-chlorophenoxy; hydroxy; C3-6 cycloalkyl; halogen; ester, amido; nitro; cyano; amino; phenyl; alkylthio; alkylsulfonyl; alkylsulfinyl; heterocycle unsubstituted or substituted by alkyl groups; or guanidine.
  • RI is hydrogen; methyl; ethyl; i-propyl; n-propyl; cyclopropyl; n-butyl; i-butyl; t-butyl; -ethylpropyl; 2,4,4-trimethylpentyl; hydroxymethyl; chloromethyl; trifluoromethyl; 2,2,2-trifluoroethyl; cyanomethyl; 2-(methylthio) ethyl; chloro; bromo; nitro; cyano; amino; aminocarbonyl; methoxycarbonyl; methylthio; methylsulfinyl; methylsulfonyl; phenyl; 2-furyl; 3-furyl; 1H-pyrrol-2-yl; 1-methyl-1H-pyrrol-2-yl; 2-thienyl; 1H-pyrazol-3-yl; 1,2,3-thiadiazol-4-yl or 1H-imidazol-2-yl.
  • RI is hydrogen; methyl; ethyl; i-propyl; n-propyl; n-butyl; methylthio: nitro; cyano; amino; chloro or 1H-pyrrol-2-yl.
  • RI is hydrogen; methyl; methylthio; nitro; cyano; amino or chloro.
  • R2 is hydrogen; C1-4 alkyl unsubstituted or substituted by hydroxy, alkanoylamino or benzoylamino; halogen; ester; cyano; alkyl carbamate; [(N-methoxy-N-methyl)amino]carbonyl.
  • R2 is hydrogen; methyl; hydroxymethyl; (acetylamino) methyl; (propionylamino) methyl; (benzoylamino) methyl; [(benzyloxy) carbonyl]amino; chloro or cyano.
  • R2 is hydrogen; chloro or cyano.
  • R3 is hydrogen; C1-4 alkyl unsubstituted or substituted by hydroxy; halogen; ester or cyano. In some embodiments, R3 is hydrogen; hydroxymethyl; chloro; cyano.
  • R3 is hydrogen or cyano. In some embodiments R3 is hydrogen.
  • R4 is hydrogen; C1-4 alkyl unsubstituted or substituted by halogens; C2-4 alkenyl substituted by halogens or phenyl group unsubstituted or substituted by azido or/and halogens.
  • R4 is hydrogen; C1-4 alkyl unsubstituted or substituted by halogens; C2-4 alkenyl substituted by halogens or phenyl group unsubstituted or substituted by azido or/and halogens.
  • R4 is hydrogen; C1-4 alkyl unsubstituted or substituted by halogens; C2-4 alkenyl substituted by halogens or phenyl group unsubstituted or substituted by azido or/and halogens.
  • R4 is hydrogen; n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 4-chlorophenyl; 4-fluorophenyl; 3,5-difluorophenyl; 3,4-difluorophenyl; 3-chloro-4-fluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl; 3-azido-2,4-difluorophenyl or 3-azido-2,4,6-trifluorophenyl.
  • R4 is hydrogen; n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 4-chlorophenyl; 4-fluorophenyl; 3,5-difluorophenyl; 3,4-difluorophenyl; 3-chloro-4-fluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl or 3-azido-2,4-difluorophenyl.
  • R4 is n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 3,5-difluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl or 3-azido-2,4-difluorophenyl.
  • R4a is hydrogen
  • R5 is hydrogen
  • R6 is hydrogen or Cl-1 ⁇ 0 alkyl unsubstituted or substituted by hydroxy or azido.
  • R6 is hydrogen or azidomethyl. More preferably R6 is hydrogen.
  • R7 is hydrogen
  • R6 and R7 are linked to form a cyclopropyl.
  • R2 and R3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R8 is hydrogen
  • R9 is hydrogen; halogen; 1-3 alkyl or alkoxy. In some embodiments, R9 is hydrogen; methyl; chloro or methoxy. In some embodiments R9 is hydrogen.
  • RIO is hydrogen; halogen; cyano; CI 3 alkyl unsubstituted or substituted by halogens; or alkoxy.
  • RIO is methyl; hydrogen; trifluoromethyl; fluoro; cyano or methoxy.
  • R10 is hydrogen; trifluoromethyl; fluoro or cyano.
  • RI 1 is hydrogen
  • R4, R4a and R5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R12 is hydrogen or halogen. In some embodiments R12 is hydrogen; chloro or fluoro. In some embodiments R12 is hydrogen.
  • R13 is hydrogen; C1 3 alkyl; halogen or thiazolyl unsubstituted or substituted by alkyl groups, such as methylthiazolyl.
  • R13 is hydrogen; chloro; bromo or methyl.
  • R13 is chloro; bromo or methyl.
  • R14 is hydrogen.
  • R15 is hydrogen
  • the compounds of formula I, or pharmaceutically acceptable salts thereof are those wherein
  • RI is selected from hydrogen; C1 lo alkyl unsubstituted or substituted by halogen, hydroxy, cyano, methylthio, phenyl or 4-chlorophenoxy; C3 6 cycloalkyl; halogen; ester; amido; nitro; cyano; amino; phenyl; alkylthio; alkylsulfonyl; alkylsulfinyl; heterocycle unsubstituted or substituted by alkyl group; or guanidine; R2 is selected from hydrogen; C 1-4 alkyl unsubstituted or substituted by hydroxy, alkanoylamino or benzoylamino; halogen; ester; cyano; alkyl carbamate or [(N-methoxy-N-methyl)amino]carbonyl.
  • R3 is selected from hydrogen; C1-4 alkyl unsubstituted or substituted by hydroxy; halogen; ester or cyano;
  • R4 is selected from hydrogen; C1 4 alkyl unsubstituted or substituted by halogens; C2 4 alkenyl substituted by halogens or phenyl group unsubstituted or substituted by azido or/and halogens;
  • R4a is hydrogen;
  • R5 is hydrogen;
  • R6 is selected from hydrogen or C 1-10 alkyl unsubstituted or substituted by hydroxy or azido;
  • R7 is hydrogen; or R6 and R7 can be linked to form a cyclopropyl; or R2 and R3 can form together with the imidazole ring the following 1H-benzimidazole cycle
  • R8 is hydrogen: R9 is selected from hydrogen; halogen: C1-3 alkyl; alkoxy; R10 is selected from hydrogen; halogen; cyano or Cil alkyl unsubstituted or substituted by halogens; or alkoxy; R 1 is hydrogen; or R4, R4a and R5 can form together with the 2-oxo-1-pyrrolidine ring the following 1,3-dihydro-2H-indol-2-one cycle
  • R12 is selected from hydrogen or halogen
  • R13 is selected from hydrogen; CI-3 alkyl; halogen; thiazolyl unsubstituted or substituted by alkyl groups, such as methylthiazolyl
  • R14 is hydrogen
  • R15 is hydrogen; with the proviso that R4 is different from hydrogen when
  • the compounds of formula I, or pharmaceutically acceptable salt thereof are those wherein
  • RI is selected from hydrogen; methyl; ethyl; i-propyl; n-propyl; cyclopropyl; n-butyl; i-butyl; t-butyl; 1-ethylpropyl; 2,4,4-trimethylpentyl; trifluoromethyl; 2,2,2-trifluoroethyl; hydroxymethyl; chloromethyl; cyanomethyl; 2-(methylthio) ethyl; chloro; bromo; nitro; cyano; amino; aminocarbonyl; methoxycarbonyl; methylthio; methylsulfinyl: methylsulfonyl; phenyl; 2-furyl; 3-furyl; 1H-pyrrol-2-yl; 1-methyl-1H-pyrrol-2-yl; 2-thienyl; 1H-pyrazol-3-yl; 1,2,3-thiadiazol-4-yl; or 1H-imidazol-2-yl; R2 is
  • R8 is hydrogen; R9 is selected from hydrogen; methyl; choro; methoxy; R10 is selected from methyl; hydrogen; trifluoromethyl; fluoro; cyano; or methoxy; R is hydrogen; R4 is selected from hydrogen; n-propyl; 2,2-difluorovinyl; phenyl; 3-chlorophenyl; 3-fluorophenyl; 4-chlorophenyl; 4-fluorophenyl: 3,5-difluorophenyl; 3,4-difluorophenyl; 3-chloro-4-fluorophenyl; 2,3,4-trifluorophenyl; 2,4,5-trifluorophenyl; 2,3,5-trifluorophenyl; 3,4,5-trifluorophenyl; 3-azido-2,4-difluorophenyl; or 3-azido-2,4,6-trifluorophenyl.
  • R4a is hydrogen; R5 is hydrogen; or R4, R
  • the compounds of formula I, or pharmaceutically acceptable salt thereof are those wherein
  • RI is selected from hydrogen; methyl; ethyl; i-propyl; n-propyl; n-butyl; methylthio; nitro; cyano; amino; chloro; or 1H-pyrrol-2-yl; R2 is selected from hydrogen; chloro; cyano; R3 is selected from hydrogen; cyano; or R2 and R3 can form together with the imidazole ring the following 1H-benzimidazole cycle

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