US20150291654A1 - 3,3 disubstituted 19-nor pregnane compounds, compositions, and uses thereof - Google Patents

3,3 disubstituted 19-nor pregnane compounds, compositions, and uses thereof Download PDF

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US20150291654A1
US20150291654A1 US14/351,449 US201214351449A US2015291654A1 US 20150291654 A1 US20150291654 A1 US 20150291654A1 US 201214351449 A US201214351449 A US 201214351449A US 2015291654 A1 US2015291654 A1 US 2015291654A1
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substituted
unsubstituted
compound
alkyl
certain embodiments
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Ravindra B. Upasani
Benny C. Askew, Jr.
Boyd L. Harrison
Peter Scott DiStefano
Francesco G. Salituro
Albert J. Robichaud
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Sage Therapeutics Inc
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J43/00—Normal steroids having a nitrogen-containing hetero ring spiro-condensed or not condensed with the cyclopenta(a)hydrophenanthrene skeleton
    • C07J43/003—Normal steroids having a nitrogen-containing hetero ring spiro-condensed or not condensed with the cyclopenta(a)hydrophenanthrene skeleton not condensed
    • 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
    • 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
    • A61P25/04—Centrally acting analgesics, e.g. opioids
    • 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
    • A61P25/08—Antiepileptics; Anticonvulsants
    • 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
    • A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • 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
    • A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • A61P25/16—Anti-Parkinson drugs
    • 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
    • A61P25/18—Antipsychotics, i.e. neuroleptics; Drugs for mania or schizophrenia
    • 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
    • A61P25/20—Hypnotics; Sedatives
    • 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
    • A61P25/22—Anxiolytics
    • 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
    • A61P25/24—Antidepressants
    • 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
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P27/00—Drugs for disorders of the senses
    • A61P27/16—Otologicals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J31/00—Normal steroids containing one or more sulfur atoms not belonging to a hetero ring
    • C07J31/006—Normal steroids containing one or more sulfur atoms not belonging to a hetero ring not covered by C07J31/003
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J5/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond
    • C07J5/0007—Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond not substituted in position 17 alfa
    • C07J5/0015—Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond not substituted in position 17 alfa not substituted in position 16
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J7/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms
    • C07J7/0005—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21
    • C07J7/001—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group
    • C07J7/0015—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group not substituted in position 17 alfa
    • C07J7/002—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group not substituted in position 17 alfa not substituted in position 16
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J7/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms
    • C07J7/008—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms substituted in position 21
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J7/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms
    • C07J7/008—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms substituted in position 21
    • C07J7/0085—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms substituted in position 21 by an halogen atom
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J9/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane
    • C07J9/005—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane containing a carboxylic function directly attached or attached by a chain containing only carbon atoms to the cyclopenta[a]hydrophenanthrene skeleton

Definitions

  • Brain excitability is defined as the level of arousal of an animal, a continuum that ranges from coma to convulsions, and is regulated by various neurotransmitters.
  • neurotransmitters are responsible for regulating the conductance of ions across neuronal membranes.
  • the neuronal membrane At rest, the neuronal membrane possesses a potential (or membrane voltage) of approximately ⁇ 70 mV, the cell interior being negative with respect to the cell exterior.
  • the potential (voltage) is the result of ion (K + , Na + , Cl ⁇ , organic anions) balance across the neuronal semipermeable membrane.
  • Neurotransmitters are stored in presynaptic vesicles and are released under the influence of neuronal action potentials.
  • an excitatory chemical transmitter such as acetylcholine will cause membrane depolarization (change of potential from ⁇ 70 mV to ⁇ 50 mV).
  • membrane depolarization change of potential from ⁇ 70 mV to ⁇ 50 mV.
  • This effect is mediated by postsynaptic nicotinic receptors which are stimulated by acetylcholine to increase membrane permeability to Na + ions.
  • the reduced membrane potential stimulates neuronal excitability in the form of a postsynaptic action potential.
  • GABA receptor complex In the case of the GABA receptor complex (GRC), the effect on brain excitability is mediated by GABA, a neurotransmitter. GABA has a profound influence on overall brain excitability because up to 40% of the neurons in the brain utilize GABA as a neurotransmitter. GABA regulates the excitability of individual neurons by regulating the conductance of chloride ions across the neuronal membrane. GABA interacts with its recognition site on the GRC to facilitate the flow of chloride ions down an electrochemical gradient of the GRC into the cell. An intracellular increase in the levels of this anion causes hyperpolarization of the transmembrane potential, rendering the neuron less susceptible to excitatory inputs (i.e., reduced neuron excitability). In other words, the higher the chloride ion concentration in the neuron, the lower the brain excitability (the level of arousal).
  • GRC is responsible for the mediation of anxiety, seizure activity, and sedation.
  • GABA and drugs that act like GABA or facilitate the effects of GABA e.g., the therapeutically useful barbiturates and benzodiazepines (BZs), such as Valium®
  • BZs benzodiazepines
  • Valium® the therapeutically useful barbiturates and benzodiazepines
  • Neuroactive steroids can occur endogenously.
  • the most potent endogenous neuroactive steroids are 3 ⁇ -hydroxy-5-reduced pregnan-20-one and 3 ⁇ -21-dihydroxy-5-reduced pregnan-20-one, metabolites of hormonal steroids progesterone and deoxycorticosterone, respectively.
  • the ability of these steroid metabolites to alter brain excitability was recognized in 1986 (Majewska, M. D. et al., Science 232:1004-1007 (1986); Harrison, N. L. et al., J Pharmacol. Exp. Ther. 241:346-353 (1987)).
  • the ovarian hormone progesterone and its metabolites have been demonstrated to have profound effects on brain excitability (Backstrom, T. et al., Acta Obstet. Gynecol. Scand. Suppl. 130:19-24 (1985); Pfaff, D. W and McEwen, B. S., Science 219:808-814 (1983); Gyermek et al., J Med Chem. 11: 117 (1968); Lambert, J. et al., Trends Pharmacol. Sci. 8:224-227 (1987)).
  • the levels of progesterone and its metabolites vary with the phases of the menstrual cycle. It has been well documented that the levels of progesterone and its metabolites decrease prior to the onset of menses.
  • PMS premenstrual syndrome
  • the steroid deoxycorticosterone has been found to be effective in treating subjects with epileptic spells correlated with their menstrual cycles (Aird, R. B. and Gordan, G., J. Amer. Med. Soc. 145:715-719 (1951)).
  • PND postnatal depression
  • progesterone levels decrease dramatically leading to the onset of PND.
  • the symptoms of PND range from mild depression to psychosis requiring hospitalization.
  • PND is also associated with severe anxiety and irritability.
  • PND-associated depression is not amenable to treatment by classic antidepressants, and women experiencing PND show an increased incidence of PMS (Dalton, K., Premenstrual Syndrome and Progesterone Therapy, 2nd edition, Chicago Yearbook, Chicago (1984)).
  • New and improved neuroactive steroids are needed that act as modulating agents for brain excitability, as well as agents for the prevention and treatment of CNS-related diseases.
  • the compounds, compositions, and methods described herein are directed toward this end.
  • the present invention is based, in part, on the desire to provide novel 19-nor compounds with good potency, pharmacokinetic (PK) properties, oral bioavailability, formulatability, stability, safety, clearance and/or metabolism.
  • PK pharmacokinetic
  • One key feature of the compounds as described herein is disubstitution at the C3 position.
  • the inventors further envision the overall effect of C3 disubstitution should be of improving the overall PK parameters and reducing potential toxicities and side effects, which may allow, in certain embodiments, administration orally and/or chronically.
  • Another key feature of the compounds as described herein is the presence of a hydrogen at the C10 position (“19-nor”) rather than a methyl group.
  • 19-nor compounds as compared to their C10-methyl counterparts, will have improved physical properties, such as improved solubility.
  • R 2 , R 4 , R 6a , R 6b , R 11a , R 11b are as defined herein,
  • a pharmaceutical composition comprising a compound of Formula (I) or (III) and a pharmaceutically acceptable carrier.
  • the compound of the present invention is provided in an effective amount in the pharmaceutical composition.
  • the compound of the present invention is provided in a therapeutically effective amount.
  • the compound of the present invention is provided in a prophylactically effective amount.
  • GABA modulators act, in certain embodiments, as GABA modulators, e.g., effecting the GABA A receptor in either a positive or negative manner.
  • modulators of the excitability of the central nervous system (CNS) as mediated by their ability to modulate GABA A receptor, such compounds are expected to have CNS-activity.
  • the CNS-related condition is insomnia, depression, mood disorders, convulsive disorders, memory disorders, attention disorders, anxiety disorders, bipolar disorder, schizophrenia, depression, bipolar disorder, schizoaffective disorder, mood disorders, anxiety disorders, personality disorders, psychosis, compulsive disorders, post-traumatic stress disorder, Autism spectrum disorder, dysthymia, social anxiety disorder, obsessive compulsive disorder, pain, sleep disorders, memory disorders, dementia, Alzheimer's disease, a seizure disorder, traumatic brain injury, stroke, addictive disorders, autism, Huntington's disease, Parkinson's disease, Rett syndrome, withdrawal syndromes, or tinnitus.
  • Compounds described herein can comprise one or more asymmetric centers, and thus can exist in various isomeric forms, e.g., enantiomers and/or diastereomers.
  • the compounds described herein can be in the form of an individual enantiomer, diastereomer or geometric isomer, or can be in the form of a mixture of stereoisomers, including racemic mixtures and mixtures enriched in one or more stereoisomer.
  • Isomers can be isolated from mixtures by methods known to those skilled in the art, including chiral high pressure liquid chromatography (HPLC) and the formation and crystallization of chiral salts; or preferred isomers can be prepared by asymmetric syntheses.
  • HPLC high pressure liquid chromatography
  • a pure enantiomeric compound is substantially free from other enantiomers or stereoisomers of the compound (i.e., in enantiomeric excess).
  • an “S” form of the compound is substantially free from the “R” form of the compound and is, thus, in enantiomeric excess of the “R” form.
  • enantiomerically pure or “pure enantiomer” denotes that the compound comprises more than 75% by weight, more than 80% by weight, more than 85% by weight, more than 90% by weight, more than 91% by weight, more than 92% by weight, more than 93% by weight, more than 94% by weight, more than 95% by weight, more than 96% by weight, more than 97% by weight, more than 98% by weight, more than 98.5% by weight, more than 99% by weight, more than 99.2% by weight, more than 99.5% by weight, more than 99.6% by weight, more than 99.7% by weight, more than 99.8% by weight or more than 99.9% by weight, of the enantiomer.
  • the weights are based upon total weight of all enantiomers or stereoisomers of the compound.
  • the term “enantiomerically pure R-compound” refers to at least about 80% by weight R-compound and at most about 20% by weight S-compound, at least about 90% by weight R-compound and at most about 10% by weight S-compound, at least about 95% by weight R-compound and at most about 5% by weight S-compound, at least about 99% by weight R-compound and at most about 1% by weight S-compound, at least about 99.9% by weight R-compound or at most about 0.1% by weight S-compound.
  • the weights are based upon total weight of compound.
  • the term “enantiomerically pure S-compound” or “S-compound” refers to at least about 80% by weight S-compound and at most about 20% by weight R-compound, at least about 90% by weight S-compound and at most about 10% by weight R-compound, at least about 95% by weight S-compound and at most about 5% by weight R-compound, at least about 99% by weight S-compound and at most about 1% by weight R-compound or at least about 99.9% by weight S-compound and at most about 0.1% by weight R-compound.
  • the weights are based upon total weight of compound.
  • an enantiomerically pure compound can be present with other active or inactive ingredients.
  • a pharmaceutical composition comprising enantiomerically pure R-compound can comprise, for example, about 90% excipient and about 10% enantiomerically pure R-compound.
  • the enantiomerically pure R-compound in such compositions can, for example, comprise, at least about 95% by weight R-compound and at most about 5% by weight S-compound, by total weight of the compound.
  • a pharmaceutical composition comprising enantiomerically pure S-compound can comprise, for example, about 90% excipient and about 10% enantiomerically pure S-compound.
  • the enantiomerically pure S-compound in such compositions can, for example, comprise, at least about 95% by weight S-compound and at most about 5% by weight R-compound, by total weight of the compound.
  • the active ingredient can be formulated with little or no excipient or carrier.
  • analogue means one analogue or more than one analogue.
  • C 1-6 alkyl is intended to encompass, C 1 , C 2 , C 3 , C 4 , C 5 , C 6 , C 1-6 , C 1-5 , C 1-4 , C 1-3 , C 1-2 , C 2-6 , C 2-5 , C 2-4 , C 2-3 , C 3-6 , C 3-5 , C 3-4 , C 4-6 , C 4-5 , and C 5-6 alkyl.
  • Alkyl refers to a radical of a straight-chain or branched saturated hydrocarbon group having from 1 to 20 carbon atoms (“C 1-20 alkyl”). In some embodiments, an alkyl group has 1 to 12 carbon atoms (“C 1-12 alkyl”). In some embodiments, an alkyl group has 1 to 10 carbon atoms (“C 1-10 alkyl”). In some embodiments, an alkyl group has 1 to 9 carbon atoms (“C 1-9 alkyl”). In some embodiments, an alkyl group has 1 to 8 carbon atoms (“C 18 alkyl”). In some embodiments, an alkyl group has 1 to 7 carbon atoms (“C 1-7 alkyl”).
  • an alkyl group has 1 to 6 carbon atoms (“C 1-6 alkyl”, also referred to herein as “lower alkyl”). In some embodiments, an alkyl group has 1 to 5 carbon atoms (“C 1-5 alkyl”). In some embodiments, an alkyl group has 1 to 4 carbon atoms (“C 1-4 alkyl”). In some embodiments, an alkyl group has 1 to 3 carbon atoms (“C 1-3 alkyl”). In some embodiments, an alkyl group has 1 to 2 carbon atoms (“C 1-2 alkyl”). In some embodiments, an alkyl group has 1 carbon atom (“C 1 alkyl”). In some embodiments, an alkyl group has 2 to 6 carbon atoms (“C 2-6 alkyl”).
  • C 1-6 alkyl groups include methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), and n-hexyl (C 6 ).
  • alkyl groups include n-heptyl (C 7 ), n-octyl (C 8 ) and the like.
  • each instance of an alkyl group is independently optionally substituted, i.e., unsubstituted (an “unsubstituted alkyl”) or substituted (a “substituted alkyl”) with one or more substituents; e.g., for instance from 1 to 5 substituents, 1 to 3 substituents, or 1 substituent.
  • the alkyl group is unsubstituted C 1-10 alkyl (e.g., —CH 3 ).
  • the alkyl group is substituted C 1-10 alkyl.
  • Alkylene refers to a substituted or unsubstituted alkyl group, as defined above, wherein two hydrogens are removed to provide a divalent radical.
  • exemplary divalent alkylene groups include, but are not limited to, methylene (—CH 2 —), ethylene (—CH 2 CH 2 —), the propylene isomers (e.g., —CH 2 CH 2 CH 2 — and —CH(CH 3 )CH 2 —) and the like.
  • Alkenyl refers to a radical of a straight-chain or branched hydrocarbon group having from 2 to 20 carbon atoms, one or more carbon-carbon double bonds, and no triple bonds (“C 2-20 alkenyl”). In some embodiments, an alkenyl group has 2 to 10 carbon atoms (“C 2-10 alkenyl”). In some embodiments, an alkenyl group has 2 to 9 carbon atoms (“C 2-9 alkenyl”). In some embodiments, an alkenyl group has 2 to 8 carbon atoms (“C 2-8 alkenyl”). In some embodiments, an alkenyl group has 2 to 7 carbon atoms (“C 2-7 alkenyl”).
  • an alkenyl group has 2 to 6 carbon atoms (“C 2-6 alkenyl”). In some embodiments, an alkenyl group has 2 to 5 carbon atoms (“C 2-5 alkenyl”). In some embodiments, an alkenyl group has 2 to 4 carbon atoms (“C 2-4 alkenyl”). In some embodiments, an alkenyl group has 2 to 3 carbon atoms (“C 2-3 alkenyl”). In some embodiments, an alkenyl group has 2 carbon atoms (“C 2 alkenyl”). The one or more carbon-carbon double bonds can be internal (such as in 2-butenyl) or terminal (such as in 1-butenyl).
  • Examples of C 2-4 alkenyl groups include ethenyl (C 2 ), 1-propenyl (C 3 ), 2-propenyl (C 3 ), 1-butenyl (C 4 ), 2-butenyl (C 4 ), butadienyl (C 4 ), and the like.
  • Examples of C 2-6 alkenyl groups include the aforementioned C 2-4 alkenyl groups as well as pentenyl (C 5 ), pentadienyl (C 5 ), hexenyl (C 6 ), and the like. Additional examples of alkenyl include heptenyl (C 7 ), octenyl (C 8 ), octatrienyl (C 8 ), and the like.
  • each instance of an alkenyl group is independently optionally substituted, i.e., unsubstituted (an “unsubstituted alkenyl”) or substituted (a “substituted alkenyl”) with one or more substituents e.g., for instance from 1 to 5 substituents, 1 to 3 substituents, or 1 substituent.
  • the alkenyl group is unsubstituted C 2-10 alkenyl.
  • the alkenyl group is substituted C 2-10 alkenyl.
  • Alkenylene refers a substituted or unsubstituted alkenyl group, as defined above, wherein two hydrogens are removed to provide a divalent radical.
  • Exemplary divalent alkenylene groups include, but are not limited to, ethenylene (—CH ⁇ CH—), propenylenes (e.g., —CH ⁇ CHCH 2 — and —C(CH 3 ) ⁇ CH— and —CH ⁇ C(CH 3 )—), and the like.
  • Alkynyl refers to a radical of a straight-chain or branched hydrocarbon group having from 2 to 20 carbon atoms, one or more carbon-carbon triple bonds, and optionally one or more double bonds (“C 2-20 alkynyl”).
  • an alkynyl group has 2 to 10 carbon atoms (“C 2-10 alkynyl”).
  • an alkynyl group has 2 to 9 carbon atoms (“C 2-9 alkynyl”).
  • an alkynyl group has 2 to 8 carbon atoms (“C 2-8 alkynyl”).
  • an alkynyl group has 2 to 7 carbon atoms (“C 2-7 alkynyl”).
  • an alkynyl group has 2 to 6 carbon atoms (“C 2-7 alkynyl”). In some embodiments, an alkynyl group has 2 to 5 carbon atoms (“C 2-5 alkynyl”). In some embodiments, an alkynyl group has 2 to 4 carbon atoms (“C 2-4 alkynyl”). In some embodiments, an alkynyl group has 2 to 3 carbon atoms (“C 2-3 alkynyl”). In some embodiments, an alkynyl group has 2 carbon atoms (“C 2 alkynyl”). The one or more carbon-carbon triple bonds can be internal (such as in 2-butynyl) or terminal (such as in 1-butynyl).
  • Examples of C 2-4 alkynyl groups include, without limitation, ethynyl (C 2 ), 1-propynyl (C 3 ), 2-propynyl (C 3 ), 1-butynyl (C 4 ), 2-butynyl (C 4 ), and the like.
  • Examples of C 2 -alkenyl groups include the aforementioned C 2-4 alkynyl groups as well as pentynyl (C 5 ), hexynyl (C 6 ), and the like.
  • Additional examples of alkynyl include heptynyl (C 7 ), octynyl (C 8 ), and the like.
  • each instance of an alkynyl group is independently optionally substituted, i.e., unsubstituted (an “unsubstituted alkynyl”) or substituted (a “substituted alkynyl”) with one or more substituents; e.g., for instance from 1 to 5 substituents, 1 to 3 substituents, or 1 substituent.
  • the alkynyl group is unsubstituted C 2-10 alkynyl.
  • the alkynyl group is substituted C 2-10 alkynyl.
  • Alkynylene refers a substituted or unsubstituted alkynyl group, as defined above, wherein two hydrogens are removed to provide a divalent radical.
  • exemplary divalent alkynylene groups include, but are not limited to, ethynylene, propynylene, and the like.
  • Aryl refers to a radical of a monocyclic or polycyclic (e.g., bicyclic or tricyclic) 4n+2 aromatic ring system (e.g., having 6, 10, or 14 it electrons shared in a cyclic array) having 6-14 ring carbon atoms and zero heteroatoms provided in the aromatic ring system (“C 6-14 aryl”).
  • an aryl group has six ring carbon atoms (“C 6 aryl”; e.g., phenyl).
  • an aryl group has ten ring carbon atoms (“C 10 aryl”; e.g., naphthyl such as 1-naphthyl and 2-naphthyl).
  • an aryl group has fourteen ring carbon atoms (“C 14 aryl”; e.g., anthracyl).
  • Aryl also includes ring systems wherein the aryl ring, as defined above, is fused with one or more carbocyclyl or heterocyclyl groups wherein the radical or point of attachment is on the aryl ring, and in such instances, the number of carbon atoms continue to designate the number of carbon atoms in the aryl ring system.
  • Typical aryl groups include, but are not limited to, groups derived from aceanthrylene, acenaphthylene, acephenanthrylene, anthracene, azulene, benzene, chrysene, coronene, fluoranthene, fluorene, hexacene, hexaphene, hexalene, as-indacene, s-indacene, indane, indene, naphthalene, octacene, octaphene, octalene, ovalene, penta-2,4-diene, pentacene, pentalene, pentaphene, perylene, phenalene, phenanthrene, picene, pleiadene, pyrene, pyranthrene, rubicene, triphenylene, and trinaphthalene.
  • aryl groups include phenyl, naphthyl, indenyl, and tetrahydronaphthyl.
  • each instance of an aryl group is independently optionally substituted, i.e., unsubstituted (an “unsubstituted aryl”) or substituted (a “substituted aryl”) with one or more substituents.
  • the aryl group is unsubstituted C 6-14 aryl.
  • the aryl group is substituted C 6-14 aryl.
  • R 56 and R 57 may be hydrogen, and at least one of R 56 and R 57 is each independently selected from C 1 -C 8 alkyl, C 1 -C 8 haloalkyl, 4-10 membered heterocyclyl, alkanoyl, C 1 -C 8 alkoxy, heteroaryloxy, alkylamino, arylamino, heteroarylamino, —NR 58 COR 59 , —NR 58 SOR 59 , —NR 58 SO 2 R 59 , —COOalkyl, —COOaryl, —CONR 58 R 59 , —CONR 58 OR 59 , NRR 59 , —NR, —SO 2 NR 58 R 59 , —S-alkyl, —SOalkyl, —SO 2 alkyl, —Saryl, —SOaryl, —SO 2 aryl; or R 56 and R 57 may be joined to form a
  • R60 and R 61 are independently hydrogen, C 1 -C 8 alkyl, C 1 -C 4 haloalkyl, C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, 5-10 membered heteroaryl, or substituted 5-10 membered heteroaryl.
  • fused aryl refers to an aryl having two of its ring carbon in common with a second aryl ring or with an aliphatic ring.
  • Alkyl is a subset of alkyl and aryl, as defined herein, and refers to an optionally substituted alkyl group substituted by an optionally substituted aryl group.
  • Heteroaryl refers to a radical of a 5-10 membered monocyclic or bicyclic 4n+2 aromatic ring system (e.g., having 6 or 10 it electrons shared in a cyclic array) having ring carbon atoms and 1-4 ring heteroatoms provided in the aromatic ring system, wherein each heteroatom is independently selected from nitrogen, oxygen and sulfur (“5-10 membered heteroaryl”).
  • heteroaryl groups that contain one or more nitrogen atoms, the point of attachment can be a carbon or nitrogen atom, as valency permits.
  • Heteroaryl bicyclic ring systems can include one or more heteroatoms in one or both rings.
  • Heteroaryl includes ring systems wherein the heteroaryl ring, as defined above, is fused with one or more carbocyclyl or heterocyclyl groups wherein the point of attachment is on the heteroaryl ring, and in such instances, the number of ring members continue to designate the number of ring members in the heteroaryl ring system. “Heteroaryl” also includes ring systems wherein the heteroaryl ring, as defined above, is fused with one or more aryl groups wherein the point of attachment is either on the aryl or heteroaryl ring, and in such instances, the number of ring members designates the number of ring members in the fused (aryl/heteroaryl) ring system.
  • Bicyclic heteroaryl groups wherein one ring does not contain a heteroatom e.g., indolyl, quinolinyl, carbazolyl, and the like
  • the point of attachment can be on either ring, i.e., either the ring bearing a heteroatom (e.g., 2-indolyl) or the ring that does not contain a heteroatom (e.g., 5-indolyl).
  • a heteroaryl group is a 5-10 membered aromatic ring system having ring carbon atoms and 1-4 ring heteroatoms provided in the aromatic ring system, wherein each heteroatom is independently selected from nitrogen, oxygen, and sulfur (“5-10 membered heteroaryl”).
  • a heteroaryl group is a 5-8 membered aromatic ring system having ring carbon atoms and 1-4 ring heteroatoms provided in the aromatic ring system, wherein each heteroatom is independently selected from nitrogen, oxygen, and sulfur (“5-8 membered heteroaryl”).
  • a heteroaryl group is a 5-6 membered aromatic ring system having ring carbon atoms and 1-4 ring heteroatoms provided in the aromatic ring system, wherein each heteroatom is independently selected from nitrogen, oxygen, and sulfur (“5-6 membered heteroaryl”).
  • the 5-6 membered heteroaryl has 1-3 ring heteroatoms selected from nitrogen, oxygen, and sulfur.
  • the 5-6 membered heteroaryl has 1-2 ring heteroatoms selected from nitrogen, oxygen, and sulfur.
  • the 5-6 membered heteroaryl has 1 ring heteroatom selected from nitrogen, oxygen, and sulfur.
  • each instance of a heteroaryl group is independently optionally substituted, i.e., unsubstituted (an “unsubstituted heteroaryl”) or substituted (a “substituted heteroaryl”) with one or more substituents.
  • the heteroaryl group is unsubstituted 5-14 membered heteroaryl. In certain embodiments, the heteroaryl group is substituted 5-14 membered heteroaryl.
  • Exemplary 5-membered heteroaryl groups containing one heteroatom include, without limitation, pyrrolyl, furanyl and thiophenyl.
  • Exemplary 5-membered heteroaryl groups containing two heteroatoms include, without limitation, imidazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl, and isothiazolyl.
  • Exemplary 5-membered heteroaryl groups containing three heteroatoms include, without limitation, triazolyl, oxadiazolyl, and thiadiazolyl.
  • Exemplary 5-membered heteroaryl groups containing four heteroatoms include, without limitation, tetrazolyl.
  • Exemplary 6-membered heteroaryl groups containing one heteroatom include, without limitation, pyridinyl.
  • Exemplary 6-membered heteroaryl groups containing two heteroatoms include, without limitation, pyridazinyl, pyrimidinyl, and pyrazinyl.
  • Exemplary 6-membered heteroaryl groups containing three or four heteroatoms include, without limitation, triazinyl and tetrazinyl, respectively.
  • Exemplary 7-membered heteroaryl groups containing one heteroatom include, without limitation, azepinyl, oxepinyl, and thiepinyl.
  • Exemplary 5,6-bicyclic heteroaryl groups include, without limitation, indolyl, isoindolyl, indazolyl, benzotriazolyl, benzothiophenyl, isobenzothiophenyl, benzofuranyl, benzoisofuranyl, benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzoxadiazolyl, benzthiazolyl, benzisothiazolyl, benzthiadiazolyl, indolizinyl, and purinyl.
  • Exemplary 6,6-bicyclic heteroaryl groups include, without limitation, naphthyridinyl, pteridinyl, quinolinyl, isoquinolinyl, cinnolinyl, quinoxalinyl, phthalazinyl, and quinazolinyl.
  • heteroaryls examples include the following:
  • each Y is selected from carbonyl, N, NR 65 , O, and S; and R 65 is independently hydrogen, C 1 -C 8 alkyl, C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, and 5-10 membered heteroaryl.
  • each W is selected from C(R 66 ) 2 , NR 66 , O, and S; and each Y is selected from carbonyl, NR 66 , O, and S; and R 66 is independently hydrogen, C 1 -C 8 alkyl, C 3 -C 10 cycloalkyl, 4-10-membered heterocyclyl, C 6 -C 10 aryl, and 5-10-membered heteroaryl.
  • Heteroaralkyl is a subset of alkyl and heteroaryl, as defined herein, and refers to an optionally substituted alkyl group substituted by an optionally substituted heteroaryl group.
  • Carbocyclyl or “carbocyclic” refers to a radical of a non-aromatic cyclic hydrocarbon group having from 3 to 10 ring carbon atoms (“C 3-10 carbocyclyl”) and zero heteroatoms in the non-aromatic ring system.
  • a carbocyclyl group has 3 to 8 ring carbon atoms (“C 3-8 carbocyclyl”).
  • a carbocyclyl group has 3 to 7 ring carbon atoms (“C 3-7 carbocyclyl”).
  • a carbocyclyl group has 3 to 6 ring carbon atoms (“C 3-6 carbocyclyl”).
  • a carbocyclyl group has 5 to 10 ring carbon atoms (“C 5-10 carbocyclyl”).
  • Exemplary C 3 -carbocyclyl groups include, without limitation, cyclopropyl (C 3 ), cyclopropenyl (C 3 ), cyclobutyl (C 4 ), cyclobutenyl (C 4 ), cyclopentyl (C 5 ), cyclopentenyl (C 5 ), cyclohexyl (C 6 ), cyclohexenyl (C 6 ), cyclohexadienyl (C 6 ), and the like.
  • Exemplary C 3-8 carbocyclyl groups include, without limitation, the aforementioned C 3-6 carbocyclyl groups as well as cycloheptyl (C 7 ), cycloheptenyl (C 7 ), cycloheptadienyl (C 7 ), cycloheptatrienyl (C 7 ), cyclooctyl (C 8 ), cyclooctenyl (C 8 ), bicyclo[2.2.1]heptanyl (C 7 ), bicyclo[2.2.2]octanyl (C 8 ), and the like.
  • Exemplary C 3-10 carbocyclyl groups include, without limitation, the aforementioned C 3-8 carbocyclyl groups as well as cyclononyl (C 9 ), cyclononenyl (C 9 ), cyclodecyl (C 10 ), cyclodecenyl (C 10 ), octahydro-1H-indenyl (C 9 ), decahydronaphthalenyl (C 10 ), spiro[4.5]decanyl (C 10 ), and the like.
  • the carbocyclyl group is either monocyclic (“monocyclic carbocyclyl”) or contain a fused, bridged or spiro ring system such as a bicyclic system (“bicyclic carbocyclyl”) and can be saturated or can be partially unsaturated.
  • “Carbocyclyl” also includes ring systems wherein the carbocyclyl ring, as defined above, is fused with one or more aryl or heteroaryl groups wherein the point of attachment is on the carbocyclyl ring, and in such instances, the number of carbons continue to designate the number of carbons in the carbocyclic ring system.
  • each instance of a carbocyclyl group is independently optionally substituted, i.e., unsubstituted (an “unsubstituted carbocyclyl”) or substituted (a “substituted carbocyclyl”) with one or more substituents.
  • the carbocyclyl group is unsubstituted C 3-10 carbocyclyl.
  • the carbocyclyl group is a substituted C 3-10 carbocyclyl.
  • “carbocyclyl” is a monocyclic, saturated carbocyclyl group having from 3 to 10 ring carbon atoms (“C 3-10 cycloalkyl”). In some embodiments, a cycloalkyl group has 3 to 8 ring carbon atoms (“C 3-8 cycloalkyl”). In some embodiments, a cycloalkyl group has 3 to 6 ring carbon atoms (“C 3-6 cycloalkyl”). In some embodiments, a cycloalkyl group has 5 to 6 ring carbon atoms (“C 5-6 cycloalkyl”). In some embodiments, a cycloalkyl group has 5 to 10 ring carbon atoms (“C 5-10 cycloalkyl”).
  • C 5-6 cycloalkyl groups include cyclopentyl (C 5 ) and cyclohexyl (C 5 ).
  • Examples of C 3-6 cycloalkyl groups include the aforementioned C 5-6 cycloalkyl groups as well as cyclopropyl (C 3 ) and cyclobutyl (C 4 ).
  • Examples of C 3-8 cycloalkyl groups include the aforementioned C 3-6 cycloalkyl groups as well as cycloheptyl (C 7 ) and cyclooctyl (C 8 ).
  • each instance of a cycloalkyl group is independently unsubstituted (an “unsubstituted cycloalkyl”) or substituted (a “substituted cycloalkyl”) with one or more substituents.
  • the cycloalkyl group is unsubstituted C 3-10 cycloalkyl.
  • the cycloalkyl group is substituted C 3-10 cycloalkyl.
  • Heterocyclyl or “heterocyclic” refers to a radical of a 3- to 10-membered non-aromatic ring system having ring carbon atoms and 1 to 4 ring heteroatoms, wherein each heteroatom is independently selected from nitrogen, oxygen, sulfur, boron, phosphorus, and silicon (“3-10 membered heterocyclyl”).
  • the point of attachment can be a carbon or nitrogen atom, as valency permits.
  • a heterocyclyl group can either be monocyclic (“monocyclic heterocyclyl”) or a fused, bridged or spiro ring system such as a bicyclic system (“bicyclic heterocyclyl”), and can be saturated or can be partially unsaturated.
  • Heterocyclyl bicyclic ring systems can include one or more heteroatoms in one or both rings.
  • Heterocyclyl also includes ring systems wherein the heterocyclyl ring, as defined above, is fused with one or more carbocyclyl groups wherein the point of attachment is either on the carbocyclyl or heterocyclyl ring, or ring systems wherein the heterocyclyl ring, as defined above, is fused with one or more aryl or heteroaryl groups, wherein the point of attachment is on the heterocyclyl ring, and in such instances, the number of ring members continue to designate the number of ring members in the heterocyclyl ring system.
  • each instance of heterocyclyl is independently optionally substituted, i.e., unsubstituted (an “unsubstituted heterocyclyl”) or substituted (a “substituted heterocyclyl”) with one or more substituents.
  • the heterocyclyl group is unsubstituted 3-10 membered heterocyclyl. In certain embodiments, the heterocyclyl group is substituted 3-10 membered heterocyclyl.
  • a heterocyclyl group is a 5-10 membered non-aromatic ring system having ring carbon atoms and 1-4 ring heteroatoms, wherein each heteroatom is independently selected from nitrogen, oxygen, sulfur, boron, phosphorus, and silicon (“5-10 membered heterocyclyl”).
  • a heterocyclyl group is a 5-8 membered non-aromatic ring system having ring carbon atoms and 1-4 ring heteroatoms, wherein each heteroatom is independently selected from nitrogen, oxygen, and sulfur (“5-8 membered heterocyclyl”).
  • a heterocyclyl group is a 5-6 membered non-aromatic ring system having ring carbon atoms and 1-4 ring heteroatoms, wherein each heteroatom is independently selected from nitrogen, oxygen, and sulfur (“5-6 membered heterocyclyl”).
  • the 5-6 membered heterocyclyl has 1-3 ring heteroatoms selected from nitrogen, oxygen, and sulfur.
  • the 5-6 membered heterocyclyl has 1-2 ring heteroatoms selected from nitrogen, oxygen, and sulfur.
  • the 5-6 membered heterocyclyl has one ring heteroatom selected from nitrogen, oxygen, and sulfur.
  • Exemplary 3-membered heterocyclyl groups containing one heteroatom include, without limitation, azirdinyl, oxiranyl, thiorenyl.
  • Exemplary 4-membered heterocyclyl groups containing one heteroatom include, without limitation, azetidinyl, oxetanyl and thietanyl.
  • Exemplary 5-membered heterocyclyl groups containing one heteroatom include, without limitation, tetrahydrofuranyl, dihydrofuranyl, tetrahydrothiophenyl, dihydrothiophenyl, pyrrolidinyl, dihydropyrrolyl and pyrrolyl-2,5-dione.
  • Exemplary 5-membered heterocyclyl groups containing two heteroatoms include, without limitation, dioxolanyl, oxasulfuranyl, disulfuranyl, and oxazolidin-2-one.
  • Exemplary 5-membered heterocyclyl groups containing three heteroatoms include, without limitation, triazolinyl, oxadiazolinyl, and thiadiazolinyl.
  • Exemplary 6-membered heterocyclyl groups containing one heteroatom include, without limitation, piperidinyl, tetrahydropyranyl, dihydropyridinyl, and thianyl.
  • Exemplary 6-membered heterocyclyl groups containing two heteroatoms include, without limitation, piperazinyl, morpholinyl, dithianyl, dioxanyl.
  • Exemplary 6-membered heterocyclyl groups containing two heteroatoms include, without limitation, triazinanyl.
  • Exemplary 7-membered heterocyclyl groups containing one heteroatom include, without limitation, azepanyl, oxepanyl and thiepanyl.
  • Exemplary 8-membered heterocyclyl groups containing one heteroatom include, without limitation, azocanyl, oxecanyl and thiocanyl.
  • Exemplary 5-membered heterocyclyl groups fused to a C 6 aryl ring include, without limitation, indolinyl, isoindolinyl, dihydrobenzofuranyl, dihydrobenzothienyl, benzoxazolinonyl, and the like.
  • Exemplary 6-membered heterocyclyl groups fused to an aryl ring include, without limitation, tetrahydroquinolinyl, tetrahydroisoquinolinyl, and the like.
  • heterocyclyl groups are shown in the following illustrative examples:
  • each W is selected from CR 67 , C(R 67 ) 2 , NR 67 , O, and S; and each Y is selected from NR 67 , O, and S; and R 67 is independently hydrogen, C 1 -C 8 alkyl, C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, 5-10 membered heteroaryl.
  • heterocyclyl rings may be optionally substituted with one or more substituents selected from the group consisting of the group consisting of acyl, acylamino, acyloxy, alkoxy, alkoxycarbonyl, alkoxycarbonylamino, amino, substituted amino, aminocarbonyl (carbamoyl or amido), aminocarbonylamino, aminosulfonyl, sulfonylamino, aryl, aryloxy, azido, carboxyl, cyano, cycloalkyl, halogen, hydroxy, keto, nitro, thiol, —S-alkyl, —S-aryl, —S(O)-alkyl, —S(O)-aryl, —S(O) 2 -alkyl, and —S(O) 2 -aryl.
  • substituents selected from the group consisting of the group consisting of the group consisting of the group consisting of the group consisting of acyl,
  • Hetero when used to describe a compound or a group present on a compound means that one or more carbon atoms in the compound or group have been replaced by a nitrogen, oxygen, or sulfur heteroatom. Hetero may be applied to any of the hydrocarbyl groups described above such as alkyl, e.g., heteroalkyl, cycloalkyl, e.g., heterocyclyl, aryl, e.g., heteroaryl, cycloalkenyl, e.g., cycloheteroalkenyl, and the like having from 1 to 5, and particularly from 1 to 3 heteroatoms.
  • alkyl e.g., heteroalkyl, cycloalkyl, e.g., heterocyclyl, aryl, e.g., heteroaryl, cycloalkenyl, e.g., cycloheteroalkenyl, and the like having from 1 to 5, and particularly from 1 to 3 heteroatoms.
  • “Acyl” refers to a radical —C(O)R 20 , where R 20 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl, as defined herein.
  • “Alkanoyl” is an acyl group wherein R 20 is a group other than hydrogen.
  • acyl groups include, but are not limited to, formyl (—CHO), acetyl (—C( ⁇ O)CH 3 ), cyclohexylcarbonyl, cyclohexylmethylcarbonyl, benzoyl (—C( ⁇ O)Ph), benzylcarbonyl (—C( ⁇ O)CH 2 Ph), —C(O)—C 1 -C 8 alkyl, —C(O)—(CH 2 ) t (C 6 -C 10 aryl), —C(O)—(CH 2 ) t (5-10 membered heteroaryl), —C(O)—(CH 2 ) t (C 3 -C 10 cycloalkyl), and —C(O)—(CH 2 ) t (4-10 membered heterocyclyl), wherein t is an integer from 0 to 4.
  • R 21 is C 1 -C 8 alkyl, substituted with halo or hydroxy; or C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, arylalkyl, 5-10 membered heteroaryl or heteroarylalkyl, each of which is substituted with unsubstituted C 1 -C 4 alkyl, halo, unsubstituted C 1 -C 4 alkoxy, unsubstituted C 1 -C 4 haloalkyl, unsubstituted C 1 -C 4 hydroxyalkyl, or unsubstituted C 1 -C 4 haloalkoxy or hydroxy.
  • “Acylamino” refers to a radical —NR 22 C(O)R 23 , where each instance of R 22 and R23 is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl, as defined herein, or R 22 is an amino protecting group.
  • acylamino groups include, but are not limited to, formylamino, acetylamino, cyclohexylcarbonylamino, cyclohexylmethyl-carbonylamino, benzoylamino and benzylcarbonylamino.
  • acylamino groups are —NR 24 C(O)—C 1 -C 8 alkyl, —NR 24 C(O)—(CH 2 ) t (C 6 -C 10 aryl), —NR 24 C(O)—(CH 2 ) t (5-10 membered heteroaryl), —NR 24 C(O)—(CH 2 ) t (C 3 -C 10 cycloalkyl), and —NR 24 C(O)—(CH 2 ) t (4-10 membered heterocyclyl), wherein t is an integer from 0 to 4, and each R 24 independently represents H or C 1 -C 8 alkyl.
  • R 25 is H, C 1 -C 8 alkyl, substituted with halo or hydroxy; C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, arylalkyl, 5-10 membered heteroaryl or heteroarylalkyl, each of which is substituted with unsubstituted C 1 -C 4 alkyl, halo, unsubstituted C 1 -C 4 alkoxy, unsubstituted C 1 -C 4 haloalkyl, unsubstituted C 1 -C 4 hydroxyalkyl, or unsubstituted C 1 -C 4 haloalkoxy or hydroxy; and R 26 is H, C 1 -C 8 alkyl, substituted with halo or hydroxy; C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, arylalkyl,
  • “Acyloxy” refers to a radical —OC(O)R 27 , where R 27 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl, as defined herein.
  • Representative examples include, but are not limited to, formyl, acetyl, cyclohexylcarbonyl, cyclohexylmethylcarbonyl, benzoyl and benzylcarbonyl.
  • R 28 is C 1 -C 8 alkyl, substituted with halo or hydroxy; C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, arylalkyl, 5-10 membered heteroaryl or heteroarylalkyl, each of which is substituted with unsubstituted C 1 -C 4 alkyl, halo, unsubstituted C 1 -C 4 alkoxy, unsubstituted C 1 -C 4 haloalkyl, unsubstituted C 1 -C 4 hydroxyalkyl, or unsubstituted C 1 -C 4 haloalkoxy or hydroxy.
  • Alkoxy refers to the group —OR 29 where R 29 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • Particular alkoxy groups are methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, tert-butoxy, sec-butoxy, n-pentoxy, n-hexoxy, and 1,2-dimethylbutoxy.
  • Particular alkoxy groups are lower alkoxy, i.e. with between 1 and 6 carbon atoms. Further particular alkoxy groups have between 1 and 4 carbon atoms.
  • R 29 is a group that has 1 or more substituents, for instance from 1 to 5 substituents, and particularly from 1 to 3 substituents, in particular 1 substituent, selected from the group consisting of amino, substituted amino, C 6 -C 10 aryl, aryloxy, carboxyl, cyano, C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, halogen, 5-10 membered heteroaryl, hydroxyl, nitro, thioalkoxy, thioaryloxy, thiol, alkyl-S(O)—, aryl-S(O)—, alkyl-S(O) 2 — and aryl-S(O) 2 —.
  • substituents for instance from 1 to 5 substituents, and particularly from 1 to 3 substituents, in particular 1 substituent, selected from the group consisting of amino, substituted amino, C 6 -C 10 aryl, aryloxy, carboxyl, cyano, C 3 -
  • Exemplary ‘substituted alkoxy’ groups include, but are not limited to, —O—(CH 2 ) t (C 6 -C 10 aryl), —O—(CH 2 ) t (5-10 membered heteroaryl), —O—(CH 2 ) t (C 3 -C 10 cycloalkyl), and —O—(CH 2 ) t (4-10 membered heterocyclyl), wherein t is an integer from 0 to 4 and any aryl, heteroaryl, cycloalkyl or heterocyclyl groups present, may themselves be substituted by unsubstituted C 1 -C 4 alkyl, halo, unsubstituted C 1 -C 4 alkoxy, unsubstituted C 1 -C 4 haloalkyl, unsubstituted C 1 -C 4 hydroxyalkyl, or unsubstituted C 1 -C 4 haloalkoxy or hydroxy.
  • Particular exemplary ‘substituted alkoxy’ groups are —OCF 3 , —OCH 2 CF 3 , —OCH 2 Ph, —OCH 2 -cyclopropyl, —OCH 2 CH 2 OH, and —OCH 2 CH 2 NMe 2 .
  • Amino refers to the radical —NH 2 .
  • Substituted amino refers to an amino group of Formula —N(R 38 ) 2 wherein R 38 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, or an amino protecting group, wherein at least one of R 38 is not a hydrogen.
  • each R 38 is independently selected from: hydrogen, C 1 -C 8 alkyl, C 3 -C 8 alkenyl, C 3 -C 8 alkynyl, C 6 -C 10 aryl, 5-10 membered heteroaryl, 4-10 membered heterocyclyl, or C 3 -C 10 cycloalkyl; or C 1 -C 8 alkyl, substituted with halo or hydroxy; C 3 -C 8 alkenyl, substituted with halo or hydroxy; C 3 -C 8 alkynyl, substituted with halo or hydroxy, or —(CH 2 ) t (C 6 -C 10 aryl), —(CH 2 ) t (5-10 membered heteroaryl), —(CH 2 ) t (C 3 -C 10 cycloalkyl), or —(CH 2 ) t (4-10 membered heterocyclyl), wherein t is an integer between 0 and 8, each of which is substituted
  • Exemplary ‘substituted amino’ groups are —NR 39 —C 1 -C 8 alkyl, —NR 39 —(CH 2 ) t (C 6 -C 10 aryl), —NR 39 —(CH 2 ) t (5-10 membered heteroaryl), —NR 39 —(CH 2 ) t (C 3 -C 10 cycloalkyl), and —NR 39 —(CH 2 ) t (4-10 membered heterocyclyl), wherein t is an integer from 0 to 4, for instance 1 or 2, each R 39 independently represents H or C 1 -C 8 alkyl; and any alkyl groups present, may themselves be substituted by halo, substituted or unsubstituted amino, or hydroxy; and any aryl, heteroaryl, cycloalkyl, or heterocyclyl groups present, may themselves be substituted by unsubstituted C 1 -C 4 alkyl, halo, unsubstituted C 1 -C
  • substituted amino includes the groups alkylamino, substituted alkylamino, alkylarylamino, substituted alkylarylamino, arylamino, substituted arylamino, dialkylamino, and substituted dialkylamino as defined below.
  • Substituted amino encompasses both monosubstituted amino and disubstituted amino groups.
  • “Azido” refers to the radical —N 3 .
  • Carbamoyl or “amido” refers to the radical —C(O)NH 2 .
  • Substituted carbamoyl or “substituted amido” refers to the radical —C(O)N(R 62 ) 2 wherein each R 62 is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, or an amino protecting group, wherein at least one of R 62 is not a hydrogen.
  • R 62 is selected from H, C 1 -C 8 alkyl, C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, aralkyl, 5-10 membered heteroaryl, and heteroaralkyl; or C 1 -C 8 alkyl substituted with halo or hydroxy; or C 3 -C 10 cycloalkyl, 4-10 membered heterocyclyl, C 6 -C 10 aryl, aralkyl, 5-10 membered heteroaryl, or heteroaralkyl, each of which is substituted by unsubstituted C 1 -C 4 alkyl, halo, unsubstituted C 1 -C 4 alkoxy, unsubstituted C 1 -C 4 haloalkyl, unsubstituted C 1 -C 4 hydroxyalkyl, or unsubstituted C 1 -C 4 haloalkoxy or
  • Exemplary ‘substituted carbamoyl’ groups include, but are not limited to, —C(O) NR 64 —C 1 -C 8 alkyl, —C(O)NR 64 —(CH 2 ) t (C 6 -C 10 aryl), —C(O)N 64 —(CH 2 ) t (5-10 membered heteroaryl), —C(O)NR 64 —(CH 2 ) t (C 3 -C 10 cycloalkyl), and —C(O)NR 64 —(CH 2 ) t (4-10 membered heterocyclyl), wherein t is an integer from 0 to 4, each R 64 independently represents H or C 1 -C 8 alkyl and any aryl, heteroaryl, cycloalkyl or heterocyclyl groups present, may themselves be substituted by unsubstituted C 1 -C 4 alkyl, halo, unsubstituted C 1 -C 4 alkoxy, unsubsti
  • Carboxy refers to the radical —C(O)OH.
  • “Cyano” refers to the radical —CN.
  • Halo or “halogen” refers to fluoro (F), chloro (Cl), bromo (Br), and iodo (I).
  • the halo group is either fluoro or chloro.
  • Haldroxy refers to the radical —OH.
  • Niro refers to the radical —NO 2 .
  • Cycloalkylalkyl refers to an alkyl radical in which the alkyl group is substituted with a cycloalkyl group.
  • Typical cycloalkylalkyl groups include, but are not limited to, cyclopropylmethyl, cyclobutylmethyl, cyclopentylmethyl, cyclohexylmethyl, cycloheptylmethyl, cyclooctylmethyl, cyclopropylethyl, cyclobutylethyl, cyclopentylethyl, cyclohexylethyl, cycloheptylethyl, and cyclooctylethyl, and the like.
  • Heterocyclylalkyl refers to an alkyl radical in which the alkyl group is substituted with a heterocyclyl group.
  • Typical heterocyclylalkyl groups include, but are not limited to, pyrrolidinylmethyl, piperidinylmethyl, piperazinylmethyl, morpholinylmethyl, pyrrolidinylethyl, piperidinylethyl, piperazinylethyl, morpholinylethyl, and the like.
  • Cycloalkenyl refers to substituted or unsubstituted carbocyclyl group having from 3 to 10 carbon atoms and having a single cyclic ring or multiple condensed rings, including fused and bridged ring systems and having at least one and particularly from 1 to 2 sites of olefinic unsaturation.
  • Such cycloalkenyl groups include, by way of example, single ring structures such as cyclohexenyl, cyclopentenyl, cyclopropenyl, and the like.
  • “Fused cycloalkenyl” refers to a cycloalkenyl having two of its ring carbon atoms in common with a second aliphatic or aromatic ring and having its olefinic unsaturation located to impart aromaticity to the cycloalkenyl ring.
  • Ether refers to substituted or unsubstituted —(CH ⁇ CH)—.
  • Ethylene refers to substituted or unsubstituted —(CH 2 —CH 2 )—.
  • Nonrogen-containing heterocyclyl means a 4- to 7-membered non-aromatic cyclic group containing at least one nitrogen atom, for example, but without limitation, morpholine, piperidine (e.g. 2-piperidinyl, 3-piperidinyl and 4-piperidinyl), pyrrolidine (e.g. 2-pyrrolidinyl and 3-pyrrolidinyl), azetidine, pyrrolidone, imidazoline, imidazolidinone, 2-pyrazoline, pyrazolidine, piperazine, and N-alkyl piperazines such as N-methyl piperazine. Particular examples include azetidine, piperidone and piperazone.
  • Thioketo refers to the group ⁇ S.
  • Alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl groups, as defined herein, are optionally substituted (e.g., “substituted” or “unsubstituted” alkyl, “substituted” or “unsubstituted” alkenyl, “substituted” or “unsubstituted” alkynyl, “substituted” or “unsubstituted” carbocyclyl, “substituted” or “unsubstituted” heterocyclyl, “substituted” or “unsubstituted” aryl or “substituted” or “unsubstituted” heteroaryl group).
  • substituted means that at least one hydrogen present on a group (e.g., a carbon or nitrogen atom) is replaced with a permissible substituent, e.g., a substituent which upon substitution results in a stable compound, e.g., a compound which does not spontaneously undergo transformation such as by rearrangement, cyclization, elimination, or other reaction.
  • a “substituted” group has a substituent at one or more substitutable positions of the group, and when more than one position in any given structure is substituted, the substituent is either the same or different at each position.
  • substituted is contemplated to include substitution with all permissible substituents of organic compounds, any of the substituents described herein that results in the formation of a stable compound.
  • the present invention contemplates any and all such combinations in order to arrive at a stable compound.
  • heteroatoms such as nitrogen may have hydrogen substituents and/or any suitable substituent as described herein which satisfy the valencies of the heteroatoms and results in the formation of a stable moiety.
  • Exemplary carbon atom substituents include, but are not limited to, halogen, —CN, —NO 2 , —N 3 , —SO 2 H, —SO 3 H, —OH, —OR aa , —ON(R bb ) 2 , —N(R bb ) 2 , —N(R bb ) 3 + X ⁇ , —N(OR cc )R bb , —SH, —SR aa , —SSR cc , —C( ⁇ O)R aa , —CO 2 H, —CHO, —C(OR cc ) 2 , —CO 2 R aa , —OC( ⁇ O)R aa , —OCO 2 R, —C( ⁇ O)N(R bb ) 2 , —OC( ⁇ O)N(R bb ) 2 , —NR bb C( ⁇ O)
  • a “counterion” or “anionic counterion” is a negatively charged group associated with a cationic quaternary amino group in order to maintain electronic neutrality.
  • exemplary counterions include halide ions (e.g., F ⁇ , Cl ⁇ , Br ⁇ , I ⁇ ), NO 3 ⁇ , ClO 4 ⁇ , OH ⁇ , H 2 PO 4 ⁇ , HSO 4 ⁇ , sulfonate ions (e.g., methansulfonate, trifluoromethanesulfonate, p-toluenesulfonate, benzenesulfonate, 10-camphor sulfonate, naphthalene-2-sulfonate, naphthalene-1-sulfonic acid-5-sulfonate, ethan-1-sulfonic acid-2-sulfonate, and the like), and carboxylate ions (e.g., acetate,
  • Nitrogen atoms can be substituted or unsubstituted as valency permits, and include primary, secondary, tertiary, and quarternary nitrogen atoms.
  • Exemplary nitrogen atom substitutents include, but are not limited to, hydrogen, —OH, —OR aa , —N(R cc ) 2 , —CN, —C( ⁇ O)R aa , —C( ⁇ O)N(R cc ) 2 , —CO 2 R aa , —SO 2 R aa , —C( ⁇ NR bb )R aa , —C( ⁇ NR cc )OR aa , —C( ⁇ NR cc )N(R cc ) 2 , —SO 2 N(R cc ) 2 , —SO 2 R cc , —SO 2 OR cc , —SOR aa , —C( ⁇ S)N(R
  • the substituent present on a nitrogen atom is a nitrogen protecting group (also referred to as an amino protecting group).
  • Nitrogen protecting groups include, but are not limited to, —OH, —OR aa , —N(R cc ) 2 , —C( ⁇ O)R aa , —C( ⁇ O)N(R cc ) 2 , —CO 2 R, —SO 2 R aa , —C( ⁇ NR cc )R aa , —C( ⁇ NR cc )OR aa , —C( ⁇ NR cc )N(R cc ) 2 , —SO 2 N(R cc ) 2 , —SO 2 R cc , —SO 2 OR cc , —SOR aa , —C( ⁇ S)N(R cc ) 2 , —C( ⁇ O)SR cc , —C( ⁇ S)SR
  • Nitrogen protecting groups are well known in the art and include those described in detail in Protecting Groups in Organic Synthesis , T. W. Greene and P. G. M. Wuts, 3 rd edition, John Wiley & Sons, 1999, incorporated herein by reference.
  • nitrogen protecting groups such as amide groups (e.g., —C( ⁇ O)R aa ) include, but are not limited to, formamide, acetamide, chloroacetamide, trichloroacetamide, trifluoroacetamide, phenylacetamide, 3-phenylpropanamide, picolinamide, 3-pyridylcarboxamide, N-benzoylphenylalanyl derivative, benzamide, p-phenylbenzamide, o-nitophenylacetamide, o-nitrophenoxyacetamide, acetoacetamide, (N′-dithiobenzyloxyacylamino)acetamide, 3-(p-hydroxyphenyl)propanamide, 3-(o-nitrophenyl)propanamide, 2-methyl-2-(o-nitrophenoxy)propanamide, 2-methyl-2-(o-phenylazophenoxy)propanamide, 4-chlorobutanamide, 3-methyl-3-nitrobutanamide, o-nitro
  • Nitrogen protecting groups such as carbamate groups include, but are not limited to, methyl carbamate, ethyl carbamante, 9-fluorenylmethyl carbamate (Fmoc), 9-(2-sulfo)fluorenylmethyl carbamate, 9-(2,7-dibromo)fluoroenylmethyl carbamate, 2,7-di-t-butyl-[9-(10,10-dioxo-10,10,10,10-tetrahydrothioxanthyl)]methyl carbamate (DBD-Tmoc), 4-methoxyphenacyl carbamate (Phenoc), 2,2,2-trichloroethyl carbamate (Troc), 2-trimethylsilylethyl carbamate (Teoc), 2-phenylethyl carbamate (hZ), 1-(1-adamantyl)-1-methylethyl carbamate
  • Nitrogen protecting groups such as sulfonamide groups include, but are not limited to, p-toluenesulfonamide (Ts), benzenesulfonamide, 2,3,6-trimethyl-4-methoxybenzenesulfonamide (Mtr), 2,4,6-trimethoxybenzenesulfonamide (Mtb), 2,6-dimethyl-4-methoxybenzenesulfonamide (Pme), 2,3,5,6-tetramethyl-4-methoxybenzenesulfonamide (Mte), 4-methoxybenzenesulfonamide (Mbs), 2,4,6-trimethylbenzenesulfonamide (Mts), 2,6-dimethoxy-4-methylbenzenesulfonamide (iMds), 2,2,5,7,8-pentamethylchroman-6-sulfonamide (Pmc), methanesulfonamide
  • Ts p-toluenesulfonamide
  • nitrogen protecting groups include, but are not limited to, phenothiazinyl-(10)-acyl derivative, N′-p-toluenesulfonylaminoacyl derivative, N′-phenylaminothioacyl derivative, N-benzoylphenylalanyl derivative, N-acetylmethionine derivative, 4,5-diphenyl-3-oxazolin-2-one, N-phthalimide, N-dithiasuccinimide (Dts), N-2,3-diphenylmaleimide, N-2,5-dimethylpyrrole, N-1,1,4,4-tetramethyldisilylazacyclopentane adduct (STABASE), 5-substituted 1,3-dimethyl-1,3,5-triazacyclohexan-2-one, 5-substituted 1,3-dibenzyl-1,3,5-triazacyclohexan-2-one, 1-substituted 3,5-dinitro-4
  • the substituent present on an oxygen atom is an oxygen protecting group (also referred to as a hydroxyl protecting group).
  • Oxygen protecting groups include, but are not limited to, —R aa , —N(R bb ) 2 , —C( ⁇ O)SR aa , —C( ⁇ O)R aa , —CO 2 R aa , —C( ⁇ O)N(R bb ) 2 , —C( ⁇ NR bb )R aa , —C( ⁇ NR bb )OR aa , —C( ⁇ NR bb )N(R bb ) 2 , —S( ⁇ O)R aa , —SO 2 R aa , Si(R aa ) 3 , —P(R cc ) 2 , —P(R cc ) 3 , —P( ⁇ O) 2 R aa , —P( ⁇ O
  • Oxygen protecting groups are well known in the art and include those described in detail in Protecting Groups in Organic Synthesis , T. W. Greene and P. G. M. Wuts, 3 rd edition, John Wiley & Sons, 1999, incorporated herein by reference.
  • oxygen protecting groups include, but are not limited to, methyl, methoxylmethyl (MOM), methylthiomethyl (MTM), t-butylthiomethyl, (phenyldimethylsilyl)methoxymethyl (SMOM), benzyloxymethyl (BOM), p-methoxybenzyloxymethyl (PMBM), (4-methoxyphenoxy)methyl (p-AOM), guaiacolmethyl (GUM), t-butoxymethyl, 4-pentenyloxymethyl (POM), siloxymethyl, 2-methoxyethoxymethyl (MEM), 2,2,2-trichloroethoxymethyl, bis(2-chloroethoxy)methyl, 2-(trimethylsilyl)ethoxymethyl (SEMOR), tetrahydropyranyl (THP), 3-bromotetrahydropyranyl, tetrahydrothiopyranyl, 1-methoxycyclohexyl, 4-methoxytetrahydropyranyl (MTHP), 4-meth
  • the substituent present on a sulfur atom is a sulfur protecting group (also referred to as a thiol protecting group).
  • Sulfur protecting groups include, but are not limited to, —R aa , —N(R bb ) 2 , —C( ⁇ O)SR aa , —C( ⁇ O)R aa , —CO 2 R aa , —C( ⁇ O)N(R bb ) 2 , —C( ⁇ NR bb )R aa , —C( ⁇ NR bb )OR aa , —C( ⁇ NR bb )N(R bb ) 2 , —S( ⁇ O)R aa , —SO 2 R aa , Si(R aa ) 3 , —P(R cc ) 2 , —P(R cc ) 3 , —P( ⁇ O) 2 R aa ,
  • Sulfur protecting groups are well known in the art and include those described in detail in Protecting Groups in Organic Synthesis , T. W. Greene and P. G. M. Wuts, 3 rd edition, John Wiley & Sons, 1999, incorporated herein by reference.
  • “Pharmaceutically acceptable” means approved or approvable by a regulatory agency of the Federal or a state government or the corresponding agency in countries other than the United States, or that is listed in the U.S. Pharmacopoeia or other generally recognized pharmacopoeia for use in animals, and more particularly, in humans.
  • “Pharmaceutically acceptable salt” refers to a salt of a compound of the invention that is pharmaceutically acceptable and that possesses the desired pharmacological activity of the parent compound.
  • such salts are non-toxic may be inorganic or organic acid addition salts and base addition salts.
  • such salts include: (1) acid addition salts, formed with inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like; or formed with organic acids such as acetic acid, propionic acid, hexanoic acid, cyclopentanepropionic acid, glycolic acid, pyruvic acid, lactic acid, malonic acid, succinic acid, malic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, 3-(4-hydroxybenzoyl)benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, 1,2-ethane-disulfonic acid, 2-hydroxyethanesulfonic acid, benzenesulfonic acid, 4-chlorobenzenesulfonic acid, 2-naphthalenesulfonic acid, 4-toluenesulfonic acid
  • Salts further include, by way of example only, sodium, potassium, calcium, magnesium, ammonium, tetraalkylammonium, and the like; and when the compound contains a basic functionality, salts of non-toxic organic or inorganic acids, such as hydrochloride, hydrobromide, tartrate, mesylate, acetate, maleate, oxalate and the like.
  • non-toxic organic or inorganic acids such as hydrochloride, hydrobromide, tartrate, mesylate, acetate, maleate, oxalate and the like.
  • pharmaceutically acceptable cation refers to an acceptable cationic counter-ion of an acidic functional group. Such cations are exemplified by sodium, potassium, calcium, magnesium, ammonium, tetraalkylammonium cations, and the like. See, e.g., Berge, et al., J. Pharm. Sci . (1977) 66(1): 1-79.
  • Solvate refers to forms of the compound that are associated with a solvent or water (also referred to as “hydrate”), usually by a solvolysis reaction. This physical association includes hydrogen bonding.
  • solvents include water, ethanol, acetic acid, and the like.
  • the compounds of the invention may be prepared e.g. in crystalline form and may be solvated or hydrated.
  • Suitable solvates include pharmaceutically acceptable solvates, such as hydrates, and further include both stoichiometric solvates and non-stoichiometric solvates. In certain instances the solvate will be capable of isolation, for example when one or more solvent molecules are incorporated in the crystal lattice of the crystalline solid.
  • “Solvate” encompasses both solution-phase and isolable solvates.
  • Representative solvates include hydrates, ethanolates and methanolates.
  • a “subject” to which administration is contemplated includes, but is not limited to, humans (i.e., a male or female of any age group, e.g., a pediatric subject (e.g., infant, child, adolescent) or adult subject (e.g., young adult, middle-aged adult or senior adult)) and/or a non-human animal, e.g., a mammal such as primates (e.g., cynomolgus monkeys, rhesus monkeys), cattle, pigs, horses, sheep, goats, rodents, cats, and/or dogs.
  • the subject is a human.
  • the subject is a non-human animal.
  • the terms “human,” “patient,” and “subject” are used interchangeably herein.
  • an “effective amount” means the amount of a compound that, when administered to a subject for treating or preventing a disease, is sufficient to effect such treatment or prevention.
  • the “effective amount” can vary depending on the compound, the disease and its severity, and the age, weight, etc., of the subject to be treated.
  • a “therapeutically effective amount” refers to the effective amount for therapeutic treatment.
  • a “prophylatically effective amount” refers to the effective amount for prophylactic treatment.
  • Preventing or “prevention” or “prophylactic treatment” refers to a reduction in risk of acquiring or developing a disease or disorder (i.e., causing at least one of the clinical symptoms of the disease not to develop in a subject not yet exposed to a disease-causing agent, or predisposed to the disease in advance of disease onset).
  • the term “prophylaxis” is related to “prevention,” and refers to a measure or procedure the purpose of which is to prevent, rather than to treat or cure a disease.
  • Treating” or “treatment” or “therapeutic treatment” of any disease or disorder refers to ameliorating the disease or disorder (i.e., arresting the disease or reducing the manifestation, extent or severity of at least one of the clinical symptoms thereof).
  • “treating” or “treatment” refers to ameliorating at least one physical parameter, which may not be discernible by the subject.
  • “treating” or “treatment” refers to modulating the disease or disorder, either physically, (e.g., stabilization of a discernible symptom), physiologically, (e.g., stabilization of a physical parameter), or both.
  • “treating” or “treatment” relates to slowing the progression of the disease.
  • the term “isotopic variant” refers to a compound that contains unnatural proportions of isotopes at one or more of the atoms that constitute such compound.
  • an “isotopic variant” of a compound can contain one or more non-radioactive isotopes, such as for example, deuterium ( 2 H or D), carbon-13 ( 13 C), nitrogen-15 ( 15 N), or the like.
  • non-radioactive isotopes such as for example, deuterium ( 2 H or D), carbon-13 ( 13 C), nitrogen-15 ( 15 N), or the like.
  • the invention may include the preparation of isotopic variants with radioisotopes, in the instance for example, where the resulting compounds may be used for drug and/or substrate tissue distribution studies.
  • the radioactive isotopes tritium, i.e., 3 H, and carbon-14, i.e., 14 C, are particularly useful for this purpose in view of their ease of incorporation and ready means of detection.
  • compounds may be prepared that are substituted with positron emitting isotopes, such as 11 C, 18 F, 15 O, and 13 N, and would be useful in Positron Emission Topography (PET) studies for examining substrate receptor occupancy. All isotopic variants of the compounds provided herein, radioactive or not, are intended to be encompassed within the scope of the invention.
  • Stepoisomers It is also to be understood that compounds that have the same molecular formula but differ in the nature or sequence of bonding of their atoms or the arrangement of their atoms in space are termed “isomers.” Isomers that differ in the arrangement of their atoms in space are termed “stereoisomers.” Stereoisomers that are not mirror images of one another are termed “diastereomers” and those that are non-superimposable mirror images of each other are termed “enantiomers.” When a compound has an asymmetric center, for example, it is bonded to four different groups, a pair of enantiomers is possible.
  • An enantiomer can be characterized by the absolute configuration of its asymmetric center and is described by the R- and S-sequencing rules of Cahn and Prelog, or by the manner in which the molecule rotates the plane of polarized light and designated as dextrorotatory or levorotatory (i.e., as (+) or ( ⁇ )-isomers respectively).
  • a chiral compound can exist as either individual enantiomer or as a mixture thereof. A mixture containing equal proportions of the enantiomers is called a “racemic mixture”.
  • Tautomers refer to compounds that are interchangeable forms of a particular compound structure, and that vary in the displacement of hydrogen atoms and electrons. Thus, two structures may be in equilibrium through the movement of it electrons and an atom (usually H). For example, enols and ketones are tautomers because they are rapidly interconverted by treatment with either acid or base. Another example of tautomerism is the aci- and nitro-forms of phenylnitromethane, that are likewise formed by treatment with acid or base. Tautomeric forms may be relevant to the attainment of the optimal chemical reactivity and biological activity of a compound of interest.
  • “Pharmaceutically acceptable metabolically cleavable group” refers to a group which is cleaved in vivo to yield the parent molecule of the structural Formula indicated herein.
  • Examples of metabolically cleavable groups include —COR, —COOR, —CONRR and —CH 2 OR radicals, where R is selected independently at each occurrence from alkyl, trialkylsilyl, carbocyclic aryl or carbocyclic aryl substituted with one or more of alkyl, halogen, hydroxy or alkoxy.
  • Specific examples of representative metabolically cleavable groups include acetyl, methoxycarbonyl, benzoyl, methoxymethyl and trimethylsilyl groups.
  • Prodrugs refers to compounds, including derivatives of the compounds of the invention, which have cleavable groups and become by solvolysis or under physiological conditions the compounds of the invention which are pharmaceutically active in vivo. Such examples include, but are not limited to, choline ester derivatives and the like, N-alkylmorpholine esters and the like. Other derivatives of the compounds of this invention have activity in both their acid and acid derivative forms, but in the acid sensitive form often offers advantages of solubility, tissue compatibility, or delayed release in the mammalian organism (see, Bundgard, H., Design of Prodrugs, pp. 7-9, 21-24, Elsevier, Amsterdam 1985).
  • Prodrugs include acid derivatives well know to practitioners of the art, such as, for example, esters prepared by reaction of the parent acid with a suitable alcohol, or amides prepared by reaction of the parent acid compound with a substituted or unsubstituted amine, or acid anhydrides, or mixed anhydrides. Simple aliphatic or aromatic esters, amides and anhydrides derived from acidic groups pendant on the compounds of this invention are particular prodrugs. In some cases it is desirable to prepare double ester type prodrugs such as (acyloxy)alkyl esters or ((alkoxycarbonyl)oxy)alkylesters.
  • C 1 to C 8 alkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, aryl, C 7 -C 12 substituted aryl, and C 7 -C 12 arylalkyl esters of the compounds of the invention are particularly the C 1 to C 8 alkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, aryl, C 7 -C 12 substituted aryl, and C 7 -C 12 arylalkyl esters of the compounds of the invention.
  • the present invention is based, in part, on the desire to provide novel 19-nor compounds with good potency, pharmacokinetic (PK) properties, oral bioavailability, formulatability, stability, safety, clearance and/or metabolism.
  • PK pharmacokinetic
  • One key feature of the compounds as described herein is disubstitution at the C3 position.
  • the inventors further envision the overall effect of C3 disubstitution should be of improving the overall PK parameters and reducing potential toxicities and side effects, which may allow, in certain embodiments, administration orally and/or chronically.
  • Another key feature of the compounds as described herein is the presence of a hydrogen at the C10 position (“19-nor”) rather than a methyl group.
  • 19-nor compounds as compared to their C10-methyl counterparts, will have improved physical properties, such as improved solubility.
  • R 1 , R 2 , R 3 , R 3′ , R 4 , R 6a , R 6b , R 11a , and R 11b are as defined herein.
  • the compound is a pharmaceutically acceptable salt, e.g., a sodium, potassium, ammonium, or calcium salt. In certain embodiments, the compound is a sodium salt. In certain embodiments, the compound is an acid addition salt, e.g., hydrochloride, hydrobromide, benzoate, mesylate, or besylate salt.
  • a pharmaceutically acceptable salt e.g., a sodium, potassium, ammonium, or calcium salt.
  • the compound is a sodium salt.
  • the compound is an acid addition salt, e.g., hydrochloride, hydrobromide, benzoate, mesylate, or besylate salt.
  • Compounds of Formula (I) and (III) are contemplated, in certain embodiments, to act as GABA modulators.
  • R 1 is hydrogen, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, —OR A1 , —SR A1 , —N(R A1 ) 2 , —OC( ⁇ O)R A1 , —OC( ⁇ O)OR A1 , —OC( ⁇ O)SR A1 , —OC( ⁇ O)N(R A1 ) 2 , —SC( ⁇ O)R A2 , —SC( ⁇ O)OR A1 , —SC( ⁇ O)SR A1 , —SC( ⁇ O)N(R A1 ) 2 , —NHC( ⁇ O)R A1
  • R 1 is hydrogen
  • R 1 is halogen, e.g., fluoro, bromo, chloro, or iodo. In certain embodiments, R 1 is bromo.
  • R 1 is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, C 2-6 alkyl, C 3-6 alkyl, C 4-6 alkyl, C 5-6 alkyl, C 1 alkyl, C 2 alkyl, C 3 alkyl, C 4 alkyl, C 5 alkyl, or C 6 alkyl.
  • R 1 is a substituted alkyl (e.g., haloalkyl, alkyoxyalkyl).
  • R 1 is substituted or unsubstituted alkenyl, e.g., substituted or unsubstituted C 2-6 alkenyl, substituted or unsubstituted C 3-6 alkenyl, substituted or unsubstituted C 4-6 alkenyl, substituted or unsubstituted C 5-6 alkenyl, substituted or unsubstituted C 2 alkenyl, substituted or unsubstituted C 3 alkenyl, substituted or unsubstituted C 4 alkenyl, substituted or unsubstituted C 5 alkenyl, or substituted or unsubstituted C 6 alkenyl.
  • alkenyl e.g., substituted or unsubstituted C 2-6 alkenyl, substituted or unsubstituted C 3-6 alkenyl, substituted or unsubstituted C 4-6 alkenyl, substituted or unsubstituted C 5-6 alkenyl, substituted
  • R 1 is substituted or unsubstituted alkynyl, e.g., substituted or unsubstituted C 2-6 alkynyl, substituted or unsubstituted C 3-6 alkynyl, substituted or unsubstituted C 4-6 alkynyl, substituted or unsubstituted C 5-6 alkynyl, substituted or unsubstituted C 2 alkynyl, substituted or unsubstituted C 3 alkynyl, substituted or unsubstituted C 4 alkynyl, substituted or unsubstituted C 5 alkynyl, or substituted or unsubstituted C 6 alkynyl.
  • R 1 is substituted or unsubstituted carbocyclyl, e.g., substituted or unsubstituted C 3-6 cycloalkyl.
  • R 1 is substituted or unsubstituted heterocyclyl, e.g., substituted or unsubstituted 3- to 6-membered heterocyclyl, e.g., substituted or unsubstituted 3-membered heterocyclyl, substituted or unsubstituted 4-membered heterocyclyl, substituted or unsubstituted 5-membered heterocyclyl, or substituted or unsubstituted 6-membered heterocyclyl.
  • R 1 is substituted or unsubstituted 5-membered heterocyclyl, e.g., pyrolidinyl.
  • R 1 is substituted or unsubstituted 6-membered heterocyclyl, e.g., substituted or unsubstituted morpholinyl, substituted or unsubstituted piperidinyl, or substituted or unsubstituted piperizinyl.
  • R 1 is substituted or unsubstituted aryl, e.g., substituted or unsubstituted phenyl or substituted or unsubstituted naphthyl.
  • R 1 is substituted or unsubstituted heteroaryl. In certain embodiments, R 1 is substituted or unsubstituted 5-membered heteroaryl. In certain embodiments, R 1 is substituted or unsubstituted 5-membered heteroaryl, with 1 heteroatom. In certain embodiments, R 1 is substituted or unsubstituted 5-membered heteroaryl, with 2 heteroatoms. In certain embodiments, R 1 is substituted or unsubstituted 5-membered heteroaryl, with 3 heteroatoms. In certain embodiments, R 1 is substituted or unsubstituted 5-membered heteroaryl, with 4 heteroatoms.
  • R 1 is heteroaryl substituted with one or more substituents selected from the group consisting of alkyl, alkenyl, alkynyl, halo, haloalkyl, haloalkenyl, haloalkylnyl, hydroxyl, alkoxy, alkoxyalkyl, amino, acyl, acylamino, oxo, cyano, aryl, heteroaryl, —SO-alkyl, —SO 2 -alkyl, —SO-aryl, —SO 2 -aryl, —SO-heteroaryl, —SO 2 -heteroaryl.
  • R 1 is an unsubstituted heteroaryl.
  • R 1 is substituted or unsubstituted heteroaryl selected from the group consisting of substituted or unsubstituted imidazolyl, pyrazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxadiazolyl, thiadiazolyl, tetrazolyl, quinolonyl, isoquinolonyl, dihydroquinolonyl, and dihydroisoquinolonyl.
  • R 1 is imidazolyl.
  • R 1 is pyrazolyl.
  • R 1 is 1,2,3-triazolyl.
  • R 1 is 1,2,4-triazolyl.
  • R 1 is tetrazolyl.
  • R 1 is imidazolyl, pyrazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxadiazolyl, thiadiazolyl, or tetrazolyl; each unsubstituted or substituted with one or two substituents selected from the group consisting of —SMe, —SOMe, —SO 2 Me, —CH 3 , F, Cl, —CN, —CH 2 F, —CHF 2 , and —CF 3 .
  • R 1 is imidazol-1-yl, 1,2,3-triazol-1-yl, or 1,2,3-triazol-2-yl, each unsubstituted or substituted with one or two substituents selected from the group consisting of —SMe, —SOMe, —SO 2 Me, —CH 3 , F, Cl, —CN, —CH 2 F, —CHF 2 , and —CF 3 .
  • R 1 is imidazolyl, pyrazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxadiazolyl, thiadiazolyl, or tetrazolyl; each unsubstituted or substituted with oxo.
  • R 1 is quinolinyl, isoquinolinyl, or purinyl; each unsubstituted or substituted with one or two substituents selected from the group consisting of —SMe, —SOMe, —SO 2 Me, —CH 3 , F, Cl, —CN, —CH 2 F, —CHF 2 , and —CF 3 .
  • R 1 is quinolonyl, or isoquinolonyl; each unsubstituted or substituted with one or two substituents selected from the group consisting of —SMe, —SOMe, —SO 2 Me, —CH 3 , F, Cl, —CN, —CH 2 F, —CHF 2 , and —CF 3 .
  • R 1 is dihydroquinolonyl or dihydroisoquinolonyl; each unsubstituted or substituted with one or two substituents selected from the group consisting of —SMe, —SOMe, —SO 2 Me, —CH 3 , F, Cl, —CN, —CH 2 F, —CHF 2 , and —CF 3 .
  • R 1 is —OR A1 , e.g., R 1 is —OH or —O-(heteroaryl).
  • R 1 is —SR A1 , e.g., R 1 is —SH or —S-(heteroaryl).
  • R 1 is —OC( ⁇ O)R A1 , e.g., —O—C( ⁇ O)CH 2 —CH 2 —CO 2 H.
  • R 1 is —OC( ⁇ O)OR A1 .
  • R 1 is —OC( ⁇ O)SR A1 .
  • R 1 is —OC( ⁇ O)N(R A1 ) 2 .
  • R 1 is —SC( ⁇ O)R A2 .
  • R 1 is —SC( ⁇ O)OR A1 .
  • R 1 is —SC( ⁇ O)SR A1 .
  • R 1 is —SC( ⁇ O)N(R A1 ) 2 .
  • R 1 is —OS( ⁇ O) 2 R A2 .
  • R 1 is —OS( ⁇ O) 2 R A1 , e.g., —O—SO 3 H.
  • R 1 is —S—S( ⁇ O) 2 R A2 .
  • R 1 is —S—S( ⁇ O) 2 OR A1 , e.g., —S—SO 3 H.
  • R 1 is —S( ⁇ O)R A2 .
  • R 1 is —SO 2 R A2 .
  • R 1 is —S( ⁇ O) 2 OR A1 , e.g., —SO 3 H.
  • R 1 is —N(R A1 ) 2 , —NHC( ⁇ O)R A1 , —NHC( ⁇ O)OR A1 , —NHC( ⁇ O)SR A1 , —NHC( ⁇ O)N(R A1 ) 2 .
  • R 1 is —N(R A1 ) 2 .
  • R 1 is —NHC( ⁇ O)R A1 .
  • R 1 is —NHC( ⁇ O)OR A1 .
  • R 1 is —NHC( ⁇ O)SR A1 .
  • R 1 is —NHC( ⁇ O)N(R A1 ) 2 .
  • R 1 is selected from —OH, —O—CO—CH 2 —CH 2 —CO 2 H, —O—SO 3 H, —SH, —S—SO 3 H, heteroaryl, —O-(heteroaryl), and —S-(heteroaryl), wherein heteroaryl is imidazolyl, pyrazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxadiazolyl, thiadiazolyl, tetrazolyl, quinolinyl, isoquinolinyl or purinyl; and each heteroaryl is unsubstituted or substituted with one or two substituents selected from the group consisting of oxo, —CH 3 , F, Cl, —CN, —SMe, —SOMe, —SO 2 Me, and —CF 3 .
  • R 1 is —O-quinolinyl, —O-isoquinolinyl, —O-purinyl, —S-quinolinyl, —S-isoquinolinyl, or —S-purinyl; each unsubstituted or substituted with one or two substituents selected from the group consisting of —CH 3 , F, C, —CN, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , and —CF 3 .
  • R 1 is —OH, —O—CH 2 —CH 2 —CO 2 H, —SO 3 H, —OSO 3 H, —SSO 3 H, pyrazol-1-yl, imidazol-1-yl, 1,2,4-triazol-1-yl, or 1,2,3-triazol-1-yl.
  • R 1 is —OH.
  • R 1 is —O—CH 2 —CH 2 —CO 2 H.
  • R 1 is —SO 3 H.
  • R 1 is —OSO 3 H.
  • R 1 is —SSO 3 H.
  • R 1 is pyrazol-1-yl.
  • R 1 is imidazol-1-yl.
  • R 1 is 1,2,4-triazol-1-yl.
  • R 1 is 1,2,3-triazol-1-yl.
  • R 1 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted alkoxy, substituted or unsubstituted heterocyclyl, substituted or unsubstituted thioalkoxy (—S— alkyl), —OH, —O—CO—(CH 2 ) t —CO 2 H, —SO 3 H, —O—SO 3 H, —SH, —S—SO 3 H, or substituted or unsubstituted —Y-(heteroaryl); wherein Y is a bond, —O—, —S—, C 1 -C 4 alkylene, C 2 -C 4 alkenylene, or C 2 -C 4 alkynylene; and the subscript t is an integer between 2 and 5, inclusive.
  • R 1 is Br, —OH, —OMe, substituted or unsubstituted heterocyclyl, —O—CO—CH 2 —CH 2 —CO 2 H, —SO 3 H, —O—SO 3 H, —S—SO 3 H, O—P( ⁇ O)(OH) 2 , pyrazolyl, imidazolyl, or triazolyl; each R 2 , R 3′ , R 4 , R 11a , and R 11b is H; and each of the dotted bonds is a single bond; then R 3 is not Et, —CF 3 , ethynyl, 4-hydroxypropynyl, or (4-acyl)-phenylethynyl.
  • At least one R A1 is heteroaryl unsubstituted or substituted with one or more substituents selected from the group consisting of halogen, —CN, —NO 2 , —N 3 , —SO 2 H, —SO 3 H, —OH, —OR aa , —ON(R bb ) 2 , —N(R bb ) 2 , —N(R bb ) 3 + X ⁇ , —N(OR cc )R bb , —SH, —SR aa , —SSR cc , —C( ⁇ O)R aa , —CO 2 H, —CHO, —C(OR cc ) 2 , —CO 2 R aa , —OC( ⁇ O)R aa , —OCO 2 R, —C( ⁇ O)N(R bb ) 2 , —OC( ⁇
  • At least one R A1 is heteroaryl unsubstituted or substituted with one or more substituents selected from the group consisting of alkyl, alkenyl, alkynyl, halo, haloalkyl, haloalkenyl, haloalkylnyl, hydroxyl, alkoxy, alkoxyalkyl, amino, acyl, acylamino, oxo, cyano, aryl, heteroaryl, —SO-alkyl, —SO 2 -alkyl, —SO-aryl, —SO 2 -aryl, —SO-heteroaryl, and —SO 2 -heteroaryl.
  • At least one R A1 is heteroaryl selected from the group consisting of unsubstituted pyrrolyl, imidazolyl, pyrazolyl, oxazoyl, thiazolyl, isoxazoyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxadiazolyl, thiadiazolyl, tetrazolyl, pyridinyl, pyrimidinyl, pyrazinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxilinyl, naphthyridinyl, indolyl, indazolyl, benzimidazloyl, pyrrolopyridinyl, pyrrolopyrimidinyl, pyridopyrimidinyl, and purinyl.
  • At least one R A1 is heteroaryl is selected from the group consisting of pyrrolyl, imidazolyl, pyrazolyl, oxazoyl, thiazolyl, isoxazoyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxadiazolyl, thiadiazolyl, tetrazolyl, pyridinyl, pyrimidinyl, pyrazinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxilinyl, naphthyridinyl, indolyl, indazolyl, benzimidazloyl, pyrrolopyridinyl, pyrrolopyrimidinyl, pyridopyrimidinyl, and purinyl, each substituted with one or more substituents selected from the group consisting of alkyl, haloalkyl, alkeny
  • R 2 is hydrogen, halo, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, —OH, —OR B1 , —OC( ⁇ O)R B1 , —NH 2 , —N(R B1 ) 2 , or —NR B1 C( ⁇ O)R B1 , wherein each instance of R B1 is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or un
  • R 2 is hydrogen
  • R 2 is halo, e.g., —F, —Br, —I, or —Cl. In certain embodiments, R 2 is —F. In certain embodiments, R 2 is —Cl. In certain embodiments, R 2 is —Br.
  • R 2 is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • alkyl e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • R 2 C 1-6 alkyl groups include, but are not limited to, substituted or unsubstituted methyl (C 1 ), substituted or unsubstituted ethyl (C 2 ), substituted or unsubstituted n-propyl (C 3 ), substituted or unsubstituted isopropyl (C 3 ), substituted or unsubstituted n-butyl (C 4 ), substituted or unsubstituted tert-butyl (C 4 ), substituted or unsubstituted sec-butyl (C 4 ), substituted or unsubstituted iso-butyl (C 4 ), substituted or unsubstituted n-pentyl (C 5 ), substituted or unsubstituted 3-pentanyl (C 5 ), substituted or unsubstituted amyl (C 5 ), substituted or unsubstituted neopentyl (C 5 ), substituted or un
  • Exemplary substituted alkyl groups include, but are not limited to, alkyl substituted with halogen groups (“haloalkyl”) and alkyl substituted with alkoxy groups (“alkoxyalkyl”).
  • haloalkyl groups include, but are not limited to, —CF 3 , —CH 2 F, —CHF 2 , difluoroethyl, 2,2,2-trifluoro-1,1-dimethyl-ethyl, —CH 2 Cl, and —CHCl 2 .
  • Exemplary alkoxyalkyl groups include, but are not limited to, —CH 2 OCH 3 and —CH 2 OCH 2 CH 3 .
  • R 2 is substituted or unsubstituted alkenyl, e.g., substituted or unsubstituted C 2-6 alkenyl, substituted or unsubstituted C 2-3 alkenyl, substituted or unsubstituted C 3-4 alkenyl, substituted or unsubstituted C 4-5 alkenyl, or substituted or unsubstituted C 5-6 alkenyl.
  • exemplary substituted alkenyl groups include, but are not limited to, alkenyl substituted with halogen groups (“haloalkenyl”) and alkenyl substituted with alkoxy groups (“alkoxyalkenyl”).
  • R 2 is substituted or unsubstituted alkynyl, e.g., substituted or unsubstituted C 2-6 alkynyl, substituted or unsubstituted C 2-3 alkynyl, substituted or unsubstituted C 3-4 alkynyl, substituted or unsubstituted C 4-5 alkynyl, or substituted or unsubstituted C 5-6 alkynyl.
  • exemplary substituted alkynyl groups include, but are not limited to, alkynyl substituted with halogen groups (“haloalkynyl”) and alkynyl substituted with alkoxy groups (“alkoxyalkynyl”).
  • R 2 is substituted or unsubstituted carbocyclyl, e.g., substituted or unsubstituted C 3-6 carbocyclyl, substituted or unsubstituted C 3-4 carbocyclyl, substituted or unsubstituted C 4-5 carbocyclyl, or substituted or unsubstituted C 5-6 carbocyclyl.
  • R 2 is substituted or unsubstituted heterocyclyl, e.g., substituted or unsubstituted C 3-6 heterocyclyl, substituted or unsubstituted C 3-4 heterocyclyl, substituted or unsubstituted C 4-5 heterocyclyl, or substituted or unsubstituted C 5-6 heterocyclyl.
  • R 2 is a substituted or unsubstituted piperidinyl, substituted or unsubstituted piperazinyl, or substituted or unsubstituted morpholinyl ring.
  • R 2 is a substituted or unsubstituted morpholinyl ring.
  • R 2 is substituted or unsubstituted aryl, e.g., substituted or unsubstituted phenyl.
  • R 2 is substituted or unsubstituted heteroaryl, e.g., optionally substituted 5- to 6-membered heteroaryl.
  • R 2 is —OH, —OR B1 , or —OC( ⁇ O)R B1 .
  • R B1 is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • R B1 C 1-6 alkyl groups include, but are not limited to, substituted or unsubstituted methyl (C 1 ), substituted or unsubstituted ethyl (C 2 ), substituted or unsubstituted n-propyl (C 3 ), substituted or unsubstituted isopropyl (C 3 ), substituted or unsubstituted n-butyl (C 4 ), substituted or unsubstituted tert-butyl (C 4 ), substituted or unsubstituted sec-butyl (C 4 ), substituted or unsubstituted iso-butyl (C 4 ), substituted or unsubstituted n-pentyl (C 5 ), substituted or unsubstituted 3-pentanyl (C 5 ), substituted or unsubstituted amyl (C 5 ), substituted or unsubstituted neopentyl (C 5 ), substituted or or
  • R 2 is —NH 2 , —N(R B1 ) 2 , or —NR B1 C( ⁇ O)R B1 .
  • R B1 is hydrogen or substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • R B1 C 1-6 alkyl groups include, but are not limited to, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), or n-hexyl (C 6 ).
  • R 2 is halo, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, —OR B1 , or —OC( ⁇ O)R B1 .
  • R 2 is hydrogen, alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, haloalkynyl, alkoxyalkyl, —OH, —OR B1 , —OC( ⁇ O)R B1 , —NH 2 , —N(R B1 ) 2 , or —NR B1 C( ⁇ O)R B1 .
  • R 2 is substituted alkyl (e.g., haloalkyl, alkoxyalkyl).
  • R 2 is —F, —Cl, methyl, ethyl, n-propyl, methoxy, ethoxy, propoxy, butoxy, ethynyl, hydroxybutynyl, methoxypropynyl, chloroethynyl, or cyclopropynyl.
  • R 2 is a non-hydrogen group in the alpha position. In certain embodiments, R 2 is a non-hydrogen group in the beta position.
  • R 3 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • R 3 is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • R 3 C 1-6 alkyl groups include, but are not limited to, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), n-hexyl (C 6 ), C 1-6 alkyl substituted with 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more fluoro groups (e.g., —CF 3 , —CH 2 F, —CHF 2 , difluoroethyl, and 2,2,2-trifluoro
  • R 3 is Me, Et, n-Pr, n-Bu, i-Bu, fluoromethyl, chloromethyl, difluoromethyl, trifluoromethyl, trifluoroethyl, difluoroethyl, 2,2,2-trifluoro-1,1-dimethyl-ethyl, methoxymethyl, methoxyethyl, or ethoxymethyl.
  • R 3a is Me, Et, n-Pr, n-Bu, or i-Bu.
  • R 3 is methoxymethyl, ethoxymethyl, propoxymethyl, methoxyethyl, or ethoxyethyl.
  • R 3 is trifluoromethoxymethyl. In certain embodiments, R 3 is fluoromethyl, chloromethyl, difluoromethyl, trifluoromethyl, difluoroethyl, trifluoroethyl, or 2,2,2-trifluoro-1,1-dimethyl-ethyl. In certain embodiments, R 3 is trifluoromethyl.
  • R 3 is substituted or unsubstituted alkenyl, e.g., substituted or unsubstituted C 2-6 alkenyl, substituted or unsubstituted C 2-3 alkenyl, substituted or unsubstituted C 3-4 alkenyl, substituted or unsubstituted C 4-5 alkenyl, or substituted or unsubstituted C 5-6 alkenyl.
  • R 3 is ethenyl (C 2 ), propenyl (C 3 ), or butenyl (C 4 ), unsubstituted or substituted with one or more substituents selected from the group consisting of alkyl, halo, haloalkyl, alkoxyalkyl, or hydroxyl.
  • R 3 is ethenyl, propenyl, or butenyl, unsubstituted or substituted with alkyl, halo, haloalkyl, alkoxyalkyl, or hydroxy.
  • R 3 is ethenyl.
  • R 3 is substituted or unsubstituted alkynyl, e.g., substituted or unsubstituted C 2-6 alkynyl, substituted or unsubstituted C 2-3 alkynyl, substituted or unsubstituted C 3-4 alkynyl, substituted or unsubstituted C 4-5 alkynyl, or substituted or unsubstituted C 5-6 alkynyl.
  • R 3 alkynyl groups include, but are not limited to, ethynyl, propynyl, or butynyl, unsubstituted or substituted with alkyl, halo, haloalkyl (e.g., CF 3 ), alkoxyalkyl, cycloalkyl (e.g., cyclopropyl or cyclobutyl), or hydroxyl.
  • R 3 is selected from the group consisting of trifluoroethynyl, cyclopropylethynyl, cyclobutylethynyl, and propynyl, fluoropropynyl, and chloroethynyl.
  • R 3 is ethynyl (C 2 ), propynyl (C 3 ), or butynyl (C 4 ), unsubstituted or substituted with one or more substituents selected from the group consisting of substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted carbocyclyl, and substituted or unsubstituted heterocyclyl.
  • R 3 is ethynyl (C 2 ), propynyl (C 3 ), or butynyl (C 4 ) substituted with substituted phenyl.
  • the phenyl substitutent is further substituted with one or more substituents selected from the group consisting of halo, alkyl, trifluoroalkyl, alkoxy, acyl, amino or amido.
  • R 3 is ethynyl (C 2 ), propynyl (C 3 ), or butynyl (C 4 ) substituted with substituted or unsubstituted pyrrolyl, imidazolyl, pyrazolyl, oxazoyl, thiazolyl, isoxazoyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxadiazolyl, thiadiazolyl, or tetrazolyl.
  • R 3 is ethynyl, propynyl, or butynyl, unsubstituted or substituted with alkyl, halo, haloalkyl, alkoxyalkyl, or hydroxyl.
  • R 3a is ethynyl or propynyl, substituted with substituted or unsubstituted aryl.
  • R 3 is ethynyl or propynyl, substituted with phenyl unsubstituted or substituted with halo, alkyl, alkoxy, haloalkyl, trihaloalkyl, or acyl.
  • R 3 is ethynyl or propynyl, substituted with substituted or unsubstituted carbocyclyl. In certain embodiments, R 3 is ethynyl or propynyl, substituted with substituted or unsubstituted cyclopropyl, cyclobutyl, cyclopentyl, or cyclohexyl. In certain embodiments, R 3 is ethynyl or propynyl, substituted with substituted or unsubstituted heteroaryl. In certain embodiments, R 3 is ethynyl or propynyl, substituted with substituted or unsubstituted pyridinyl, or pyrimidinyl.
  • R 3 is ethynyl or propynyl, substituted with substituted or unsubstituted pyrrolyl, imidazolyl, pyrazolyl, oxazoyl, thiazolyl, isoxazoyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxadiazolyl, thiadiazolyl, tetrazolyl.
  • R 3 is ethynyl or propynyl, substituted with substituted or unsubstituted heterocyclyl.
  • R 3a is ethynyl or propynyl, substituted with substituted or unsubstituted pyrrolidinyl, piperidinyl, piperazinyl, or mopholinyl.
  • R 3 is propynyl or butynyl, substituted with hydroxyl or alkoxy.
  • R 3 is propynyl or butynyl, substituted with methoxy or ethoxy.
  • R 3 is ethynyl or propynyl, substituted with Cl.
  • R 3 is ethynyl or propynyl, substituted with trifluoromethyl.
  • R 3 is substituted or unsubstituted carbocyclyl, e.g., substituted or unsubstituted C 3-6 carbocyclyl, substituted or unsubstituted C 3-4 carbocyclyl, substituted or unsubstituted C 4-5 carbocyclyl, or substituted or unsubstituted C 5-6 carbocyclyl.
  • R 3 is substituted or unsubstituted heterocyclyl, e.g., substituted or unsubstituted 3-6 membered heterocyclyl, substituted or unsubstituted 3-4 membered heterocyclyl, substituted or unsubstituted 4-5 membered heterocyclyl, or substituted or unsubstituted 5-6 membered heterocyclyl.
  • R 3 is substituted or unsubstituted aryl. In certain embodiments, R 3 is substituted or unsubstituted phenyl.
  • R 3 is substituted or unsubstituted heteroaryl, e.g., optionally substituted 5- to 6-membered heteroaryl.
  • R 3 As a substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, and substituted or unsubstituted alkynyl groups, are depicted below:
  • each instance of R 3a is hydrogen, halo, or —OR F1 , wherein R F1 is substituted or unsubstituted alkyl; and each instance of R 3b and R 3c is independently hydrogen, halo, or substituted or unsubstituted alkyl, substituted or unsubstituted carbocyclyl, or substituted or unsubstituted heterocyclyl.
  • At least one R 3a is hydrogen. In certain embodiments, at least two R 3c is hydrogen. In certain embodiments, each R 3a is hydrogen. In certain embodiments, at least one R 3a is halogen (e.g., fluoro, chloro, bromo, iodo). In certain embodiments, at least two R 3a are halogen (e.g., fluoro, chloro, bromo, iodo). In certain embodiments, each R 3a is halogen (e.g., fluoro, to provide the group —CF 3 ). In certain embodiments, at least one R 3a is —OR F1 (e.g., OMe or OEt).
  • At least two R 3a is —OR F1 (e.g., OMe or OEt). In certain embodiments, at least one R 3a is hydrogen, F, —OMe, or —OEt. In certain embodiments, one of R 3a is a non-hydrogen group (e.g., —F, —OMe, or OEt); and the rest are H, such as provided in the below formula:
  • R 3b is hydrogen. In certain embodiments, R 3b is halogen (e.g., fluoro, chloro, bromo, iodo). In certain embodiments, R 3b is alkyl, e.g., —CH 3 , —CF 3 , —CH 2 CH 2 Cl. In certain embodiments, R 3b is substituted or unsubstituted carbocyclyl, e.g., cyclopropyl or cyclobutyl. In certain embodiments, R 3b is hydrogen, —F, —Br, —Cl, —I, —CH 3 , —CF 3 , cyclopropyl, or cyclobutyl.
  • R 3b is hydrogen, —F, —Br, —Cl, —I, —CH 3 , —CF 3 , cyclopropyl, or cyclobutyl.
  • R 3b is substituted or unsubstituted cyclopropyl.
  • R 3b is hydrogen, —F, —Br, —Cl, —I, —CH 3 , —CF 3 , —CH 2 CH 2 Cl, cyclopropyl, or cyclobutyl.
  • R 3b is Me or Cl.
  • R 3b is substituted or unsubstituted heterocyclyl.
  • At least one R 3c is hydrogen. In certain embodiments, each R 3c is hydrogen. In certain embodiments, at least one R 3c is halogen (e.g., fluoro, chloro, bromo, iodo). In certain embodiments, each R 3c is halogen (e.g., fluoro, chloro, bromo, iodo). In certain embodiments, each of R 3c is alkyl, e.g., each of R 2c is Me. In certain embodiments, one of R 3c is alkyl; and the other is hydrogen, e.g., one of R 3c is Me; and the other is hydrogen.
  • one of R 3c is substituted or unsubstituted carbocyclyl, e.g., cyclopropyl or cyclobutyl, and the other is hydrogen.
  • at least one R 3c is hydrogen, —F, —Br, —Cl, —I, —CH 3 , —CF 3 , cyclopropyl, or cyclobutyl.
  • each instance of R 3c is H.
  • each instance of R 3c is halogen (e.g., fluoro, chloro, bromo, iodo).
  • each instance of R 3c is alkyl, e.g., —CH 3 , —CF 3 , —CH 2 CH 2 Cl. In certain embodiments, each instance of R 3c is substituted or unsubstituted carbocyclyl, e.g., cyclopropyl or cyclobutyl. In certain embodiments, R 3c is substituted or unsubstituted cyclopropyl. In certain embodiments, each instance of R 3c is hydrogen, —F, —Br, —Cl, —I, —CH 3 , —CF 3 , —CH 2 CH 2 Cl, cyclopropyl, or cyclobutyl. In certain embodiments, R 3c is Me or Cl. In certain embodiments, R 3c is substituted or unsubstituted heterocyclyl.
  • R 3′ is H, —C( ⁇ O)R C1 , —C( ⁇ O)OR C1 , —C( ⁇ O)SR C1 , —C( ⁇ O)N(R C1 ) 2 , —S( ⁇ O) 2 R C2 , —S( ⁇ O) 2 OR C1 , —P( ⁇ O) 2 R C2 , —P( ⁇ O) 2 OR, —P( ⁇ O)(OR C1 ) 2 , —P( ⁇ O)(R C2 ) 2 , or —P( ⁇ O)(R C2 )(OR C1 ), wherein R C1 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted ary
  • R 3′ is H (hydrogen).
  • R 3 is —C( ⁇ O)R C1 , —C( ⁇ O)OR C1 , —C( ⁇ O)SR C1 , —C( ⁇ O)N(R C1 ) 2 , —S( ⁇ O) 2 R C1 , —S( ⁇ O) 2 OR C1 , —P( ⁇ O) 2 R C1 , —P( ⁇ O) 2 OR C1 , —P( ⁇ O)(OR C1 ) 2 , —P( ⁇ O)(R C1 ) 2 , or —P( ⁇ O)(R C1 )(OR C1 ).
  • At least one instance of R C1 is hydrogen or a protecting group, i.e., an oxygen protecting group when attached to an oxygen atom, sulfur protecting group when attached to an sulfur atom, or a nitrogen protecting group when attached to a nitrogen atom. In certain embodiments, at least one instance of R C1 is hydrogen.
  • R C1 is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • alkyl e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • R C1 C 1-6 alkyl groups include, but are not limited to, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), n-hexyl (C 6 ), C 1-6 alkyl substituted with 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more fluoro groups (e.g., —CF 3 , —CH 2 F, —CHF 2 , difluoroethyl, and 2,2,2-trifluor
  • R C1 is substituted or unsubstituted alkenyl, e.g., substituted or unsubstituted C 2-6 alkenyl, substituted or unsubstituted C 2-3 alkenyl, substituted or unsubstituted C 3-4 alkenyl, substituted or unsubstituted C 4-5 alkenyl, or substituted or unsubstituted C 5-6 alkenyl.
  • R C1 is substituted or unsubstituted alkynyl, e.g., substituted or unsubstituted C 2-4 alkynyl, substituted or unsubstituted C 2-3 alkynyl, substituted or unsubstituted C 3-4 alkynyl, substituted or unsubstituted C 4-5 alkynyl, or substituted or unsubstituted C 5-6 alkynyl.
  • R C1 is substituted or unsubstituted carbocyclyl, e.g., substituted or unsubstituted C 3-6 carbocyclyl, substituted or unsubstituted C 3-4 carbocyclyl, substituted or unsubstituted C 4-5 carbocyclyl, or substituted or unsubstituted C 5-6 carbocyclyl.
  • At least one instance of R C1 is substituted or unsubstituted heterocyclyl, e.g., substituted or unsubstituted 3-6 membered heterocyclyl, substituted or unsubstituted 3-4 membered heterocyclyl, substituted or unsubstituted 4-5 membered heterocyclyl, or substituted or unsubstituted 5-6 membered heterocyclyl.
  • At least one instance of R C1 is substituted or unsubstituted aryl, e.g., substituted or unsubstituted phenyl.
  • At least one instance of R C1 is substituted or unsubstituted heteroaryl, e.g., optionally substituted 5- to 6-membered heteroaryl.
  • two R C1 groups are joined to form a substituted or unsubstituted heterocyclic ring, e.g., a substituted or unsubstituted piperidinyl, substituted or unsubstituted piperazinyl, or substituted or unsubstituted morpholinyl ring.
  • a substituted or unsubstituted heterocyclic ring e.g., a substituted or unsubstituted piperidinyl, substituted or unsubstituted piperazinyl, or substituted or unsubstituted morpholinyl ring.
  • R 3′ is —C( ⁇ O)R C1 , —C( ⁇ O)OR C1 , —C( ⁇ O)N(R 1 ) 2 or —C( ⁇ O)N(OR C1 )(R C1 ), wherein R C1 is as defined herein.
  • R 3′ is —C( ⁇ O)R C1 , e.g., for example, wherein R C1 is, for example, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), or n-hexyl (C 6 ).
  • R C1 is, for example, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), is
  • R 3′ is —C( ⁇ O)CH 3 . In certain embodiments, R 3′ is —C( ⁇ O)(CH 2 ) m CO 2 H, wherein m is an integer between 2 and 5, inclusive. In certain embodiments, m is 2. In certain embodiments, m is 3. In certain embodiments, m is 4. In certain embodiments, m is 5. In certain embodiments, R 3′ is —C( ⁇ O)CH 2 CH 2 C( ⁇ O)OH.
  • R 3′ is —C( ⁇ O)OR C1 , e.g., for example, wherein R C1 is, for example, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), or n-hexyl (C 6 ).
  • R C1 is, for example, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), is
  • R 3′ is —C( ⁇ O)SR C1 , e.g., for example, wherein R C1 is, for example, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), or n-hexyl (C 6 ).
  • R C1 is, for example, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), is
  • R 3′ is —C( ⁇ O)N(R C1 ) 2 , e.g., —C( ⁇ O)NH 2 or —C( ⁇ O)NHR C1 , wherein R C1 is, for example, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), or n-hexyl (C 6 ), or R 3′ is —C( ⁇ O)N(R C1 ) 2 ,
  • R 3′ is —S( ⁇ O) 2 R C1 or —S( ⁇ O) 2 OR C1 , wherein R C1 is, for example, hydrogen, or substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C 5 ), or n-hexyl (C 6 ), or substituted or unsubstituted phenyl.
  • R is —S( ⁇ O) 2 R C1 .
  • R C1 is, for example
  • R 3′ is —P( ⁇ O) 2 R C1 , —P( ⁇ O) 2 OR C1 , —P( ⁇ O)(OR C1 ) 2 , —P( ⁇ O)(R C1 ) 2 , or —P( ⁇ O)(R C )(OR C1 ), wherein each R C1 is, for example, independently hydrogen, substituted or unsubstituted methyl (C 1 ), ethyl (C 2 ), n-propyl (C 3 ), isopropyl (C 3 ), n-butyl (C 4 ), tert-butyl (C 4 ), sec-butyl (C 4 ), iso-butyl (C 4 ), n-pentyl (C 5 ), 3-pentanyl (C 5 ), amyl (C 5 ), neopentyl (C 5 ), 3-methyl-2-butanyl (C 5 ), tertiary amyl (C
  • R 3′ is —P( ⁇ O) 2 R C1 . In certain embodiments, R 3′ is —P( ⁇ O) 2 OR C1 . In certain embodiments, R 3 is —P( ⁇ O)(OR C1 ) 2 . In certain embodiments, R 3′ is —P( ⁇ O)(R C1 ) 2 . In certain embodiments, R 3 is —P( ⁇ O)(R C1 )(OR C1 ).
  • R 4 is H, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • R 4 is H, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 4 is H, —CH 3 , or ethynyl.
  • R 4 is H.
  • each of R 6a and R 6b is independently hydrogen, halo (e.g., fluoro), substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl, or R 6a and R 6b are joined to form an oxo ( ⁇ O) group, and represents a single or double bond, provided if a double bond is present in Ring B, then one of R 6a or R 6b is absent, and provided if a single bond is present in Ring B, then the hydrogen at C5 is in the alpha or beta position.
  • halo e.g., fluoro
  • the hydrogen at C5 is in the alpha or beta position.
  • the dashed line between C5 and C6 represents a single bond, and the hydrogen at the 5-position is in the 5 ⁇ -conformation.
  • the dashed line between C5 and C6 represents a single bond, and the hydrogen at the 5-position is in the 5 ⁇ -conformation.
  • the dashed line between C5 and C6 represents a double bond.
  • both R 6a and R 6b are hydrogen.
  • R 6a is alpha (down) and R 6b is beta (up). In certain embodiments, R 6b is alpha (down) and R 6a is beta (up).
  • R 6a is hydrogen
  • R 6b is halo, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 6a is hydrogen
  • R 6b is halo (e.g., fluoro).
  • R 6a is hydrogen
  • R 6b is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl, e.g., methyl, ethyl, propyl, or isopropyl.
  • R 6a is hydrogen
  • R 6b is substituted or unsubstituted alkenyl.
  • R 6a is hydrogen
  • R 6b is substituted or unsubstituted alkynyl.
  • R 6b is hydrogen, and R 6a is halo, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 6b is hydrogen, and R 6a is halo (e.g., fluoro).
  • R 6b is hydrogen, and R 6a is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl, e.g., methyl, ethyl, propyl, or isopropyl.
  • R 6b is hydrogen, and R 6a is substituted or unsubstituted alkenyl.
  • R 6b is hydrogen, and R 6a is substituted or unsubstituted alkynyl.
  • R 6a and R 6b are joined to form an oxo ( ⁇ O) group.
  • R 6a is hydrogen. In certain embodiments, wherein represents a double bond, R 6a is halo, e.g., fluoro. In certain embodiments, wherein represents a double bond, R 6a is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl, e.g., methyl, ethyl, propyl, or isopropyl. In certain embodiments, wherein represents a double bond, R 6a is substituted or unsubstituted alkenyl. In certain embodiments, wherein represents a double bond, R 6a
  • each of R 11a and R 11b is independently hydrogen, halo, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, —OH, —OR D1 , —OC( ⁇ O)R D1 , —NH 2 , —N(R D1 ) 2 , or —NR D1 C( ⁇ O)R D1 , wherein each instance of R D1 is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted carbocyclyl, substituted or unsubstituted heterocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, an oxygen protecting group when attached to an oxygen atom, a nitrogen protecting group when attached to a nitrogen atom
  • R 11a is alpha (down) and R 11b is beta (up). In certain embodiments, R 11b is alpha (down) and R 11a is beta (up).
  • At least one of R 11a and R 11b is hydrogen. In certain embodiments, each of R 11a and R 11b is H.
  • R 11a and R 11b are halo, e.g., —F, —Br, —I, or —Cl.
  • R 11a is halo and R 11b is hydrogen.
  • R 11b is halo and R 11a is hydrogen.
  • R 11a and R 11b is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • alkyl e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • R 11a C 1-6 alkyl groups include, but are not limited to, substituted or unsubstituted methyl (C 1 ), substituted or unsubstituted ethyl (C 2 ), substituted or unsubstituted n-propyl (C 3 ), substituted or unsubstituted iso-propyl (C 3 ), substituted or unsubstituted n-butyl (C 4 ), substituted or unsubstituted tert-butyl (C 4 ), substituted or unsubstituted sec-butyl (C 4 ), substituted or unsubstituted iso-butyl (C 4 ), substituted or unsubstituted n-pentyl (C 5 ), substituted or unsubstituted 3-pentanyl (C 5 ), substituted or unsubstituted amyl (C 5 ), substituted or unsubstituted neopentyl (C 5 ), substituted
  • Exemplary substituted alkyl groups include, but are not limited to, alkyl substituted with halogen groups (“haloalkyl”) and alkyl substituted with alkoxy groups (“alkoxyalkyl”).
  • haloalkyl groups include, but are not limited to, —CF 3 , —CH 2 F, —CHF 2 , difluoroethyl, 2,2,2-trifluoro-1,1-dimethyl-ethyl, —CH 2 Cl, and —CHCl 2 .
  • Exemplary alkoxyalkyl groups include, but are not limited to, —CH 2 OCH 3 and —CH 2 OCH 2 CH 3 .
  • at least one of R 11a and R 11b is substituted alkyl (e.g., haloalkyl, alkoxyalkyl).
  • R 11a is alkyl and R 11b is hydrogen. In certain embodiments, R 11b is alkyl and R 11a is hydrogen.
  • R 11a and R 11b is substituted or unsubstituted alkenyl, e.g., substituted or unsubstituted C 2-6 alkenyl, substituted or unsubstituted C 2-3 alkenyl, substituted or unsubstituted C 3-4 alkenyl, substituted or unsubstituted C 4-5 alkenyl, or substituted or unsubstituted C 5-6 alkenyl.
  • exemplary substituted alkenyl groups include, but are not limited to, alkenyl substituted with halogen groups (“haloalkenyl”) and alkenyl substituted with alkoxy groups (“alkoxyalkenyl”).
  • R 11a is alkenyl and R 11b is hydrogen.
  • R 11b is alkenyl and R 11a is hydrogen.
  • R 11a and R 11b is substituted or unsubstituted alkynyl, e.g., substituted or unsubstituted C 2 alkynyl, substituted or unsubstituted C 2-3 alkynyl, substituted or unsubstituted C 3-4 alkynyl, substituted or unsubstituted C 4-5 alkynyl, or substituted or unsubstituted C 5-6 alkynyl.
  • exemplary substituted alkynyl groups include, but are not limited to, alkynyl substituted with halogen groups (“haloalkynyl”) and alkynyl substituted with alkoxy groups (“alkoxyalkynyl”).
  • R 11a is alkynyl and R 11b is hydrogen.
  • R 11b is alkynyl and R 11a is hydrogen.
  • R 11a and R 11b is substituted or unsubstituted carbocyclyl, e.g., substituted or unsubstituted C 3-6 carbocyclyl, substituted or unsubstituted C 3-4 carbocyclyl, substituted or unsubstituted C 4-5 carbocyclyl, or substituted or unsubstituted C 5-6 carbocyclyl.
  • R 11a is carbocyclyl and R 11b is hydrogen.
  • R 11b is carbocyclyl and R 11a is hydrogen.
  • At least one of R 11a and R 11b is substituted or unsubstituted heterocyclyl, e.g., substituted or unsubstituted C 3-6 heterocyclyl, substituted or unsubstituted C 3-4 heterocyclyl, substituted or unsubstituted C 4-5 heterocyclyl, or substituted or unsubstituted C 5-6 heterocyclyl.
  • at least one of R 11a and R 11b is a substituted or unsubstituted piperidinyl, substituted or unsubstituted piperazinyl, or substituted or unsubstituted morpholinyl ring.
  • R 11a and R 11b are a substituted or unsubstituted morpholinyl ring.
  • R 11a is heterocyclyl and R 11b is hydrogen.
  • R 11b is heterocyclyl and R 11a is hydrogen.
  • R 11a and R 11b are substituted or unsubstituted aryl, e.g., substituted or unsubstituted phenyl.
  • R 11a is aryl and R 11b is hydrogen.
  • R 11b is aryl and R 11a is hydrogen.
  • R 11a and R 11b are substituted or unsubstituted heteroaryl, e.g., optionally substituted 5- to 6-membered heteroaryl.
  • R 11a is heteroaryl and R 11b is hydrogen.
  • R 11b is heteroaryl and R 11a is hydrogen.
  • R 11a and R 11b are —OH, —OR D1 , or —OC( ⁇ O)R D1 .
  • R D1 is substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • R D1 C 1-6 alkyl groups include, but are not limited to, substituted or unsubstituted methyl (C 1 ), substituted or unsubstituted ethyl (C 2 ), substituted or unsubstituted n-propyl (C 3 ), substituted or unsubstituted isopropyl (C 3 ), substituted or unsubstituted n-butyl (C 4 ), substituted or unsubstituted tert-butyl (C 4 ), substituted or unsubstituted sec-butyl (C 4 ), substituted or unsubstituted iso-butyl (C 4 ), substituted or unsubstituted n-pentyl (C 5 ), substituted or unsubstituted 3-pentanyl (C 5 ), substituted or unsubstituted amyl (C 5 ), substituted or unsubstituted neopentyl (C 5 ), substituted or or
  • R 11a and R 11b are —OH.
  • R 11a is —OH, —OR D1 , or —OC( ⁇ O)R D1 and R 11b is hydrogen.
  • R 11b is —OH, —OR D1 , or —OC( ⁇ O)R D1 and R 11a is hydrogen.
  • R 11a and R 11b are —NH 2 , —N(R D1 ) 2 , or —NRDC( ⁇ O)R D1 .
  • R D1 is hydrogen or substituted or unsubstituted alkyl, e.g., substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C 1-2 alkyl, substituted or unsubstituted C 2-3 alkyl, substituted or unsubstituted C 3-4 alkyl, substituted or unsubstituted C 4-5 alkyl, or substituted or unsubstituted C 5-6 alkyl.
  • R D1 C 1-6 alkyl groups include, but are not limited to, substituted or unsubstituted methyl (C 1 ), substituted or unsubstituted ethyl (C 2 ), substituted or unsubstituted n-propyl (C 3 ), substituted or unsubstituted isopropyl (C 3 ), substituted or unsubstituted n-butyl (C 4 ), substituted or unsubstituted tert-butyl (C 4 ), substituted or unsubstituted sec-butyl (C 4 ), substituted or unsubstituted iso-butyl (C 4 ), substituted or unsubstituted n-pentyl (C 5 ), substituted or unsubstituted 3-pentanyl (C 5 ), substituted or unsubstituted amyl (C 5 ), substituted or unsubstituted neopentyl (C 5 ), substituted or or
  • R 11a and R 11b are —N(R D1 ) 2 , e.g., —NH 2 , —N(CH 3 ) 2 .
  • R 11a is —NH 2 , —N(R D1 ) 2 , or —NR D1 C( ⁇ O)R D1 and R 11b is hydrogen.
  • R 11b is —NH 2 , —N(R D1 ) 2 , or —NR D1 C( ⁇ O)R D1 and R 11a is hydrogen.
  • R 11a and R 11b are joined to form an oxo ( ⁇ O) group.
  • the compound of Formula (I) is of Formula (I-a1), (I-a2), or (I-a3):
  • R 1 is hydrogen, halogen (e.g., bromine), —OR A1 (e.g., —OH), —N(R A1 ) 2 , —S—S( ⁇ O) 2 R A2 , substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl.
  • R 1 is hydrogen, bromine, or —OH.
  • R 2 is hydrogen, substituted or unsubstituted heterocyclyl, —OH, —OR B1 , —OC( ⁇ O)R B1 , —NH 2 , —N(R B1 ) 2 , or —NR B1 C( ⁇ O)R B1 .
  • R is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 3′ is hydrogen.
  • R 4 is hydrogen.
  • both R 6a and R 6b are hydrogen.
  • one of R 6a and R 6b is a non-hydrogen group.
  • R 6a is a non-hydrogen alpha group. In certain embodiments, R 6a is a non-hydrogen beta group. In certain embodiments, R 6a is halo, e.g., fluoro, or alkyl. In certain embodiments, R 6a is halo, e.g., fluoro, or alkyl, and R 6b is hydrogen. In certain embodiments, R 6a and R 6b are both halo, e.g., fluoro. In certain embodiments, R 6a and R 6b are both alkyl, e.g., methyl. In certain embodiments, R 6a and R 6b are joined to form an oxo group. In certain embodiments, both R 11a and R 11b are hydrogen. In certain embodiments, one of R 11a and R 11b is a non-hydrogen group. In certain embodiments, R 11a and R 11b are joined to form an oxo group.
  • the compound of Formula (III) is of Formula (III-a1), (III-a2), or (III-a3):
  • R 1 is hydrogen, halogen (e.g., bromine), —OR A1 (e.g., —OH), —N(R A1 ) 2 , —S—S( ⁇ O) 2 R A2 , substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl.
  • R 1 is hydrogen, bromine, or —OH.
  • R 2 is hydrogen, substituted or unsubstituted heterocyclyl, —OH, —OR, —OC( ⁇ O)R B1 , —NH 2 , —N(R B1 ) 2 , or —NR B1 C( ⁇ O)R B1 .
  • R 3 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 3′ is hydrogen.
  • R 4 is hydrogen.
  • both R 6a and R 6b are hydrogen.
  • one of R 6a and R 6b is a non-hydrogen group.
  • R 6a is a non-hydrogen alpha group. In certain embodiments, R 6a is a non-hydrogen beta group. In certain embodiments, R 6a is halo, e.g., fluoro, or alkyl. In certain embodiments, R 6a is halo, e.g., fluoro, or alkyl, and R 6b is hydrogen. In certain embodiments, R 6a and R 6b are both halo, e.g., fluoro. In certain embodiments, R 6a and R 6b are both alkyl, e.g., methyl. In certain embodiments, R 6a and R 6b are joined to form an oxo group.
  • both R 11a and R 11b are hydrogen. In certain embodiments, one of R 11a and R 11b is a non-hydrogen group. In certain embodiments, R 11a and R 11b are joined to form an oxo group.
  • the compound of Formula (I) is of Formula (I-b1), (I-b2), or (I-b3):
  • R 1 is hydrogen, halogen (e.g., bromine), —OR A1 (e.g., —OH), —N(R A1 ) 2 , —S—S( ⁇ O) 2 R A2 , substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl.
  • R 1 is hydrogen, bromine, or —OH.
  • R 3 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 3′ is hydrogen.
  • both R 6a and R 6b are hydrogen.
  • one of R 6a and R 6b is a non-hydrogen group.
  • R 6a is a non-hydrogen alpha group.
  • R 6a is a non-hydrogen beta group.
  • R 6a is halo, e.g., fluoro, or alkyl.
  • R 6a is halo, e.g., fluoro, or alkyl
  • R 6b is hydrogen
  • R 6a and R 6b are both halo, e.g., fluoro.
  • R 6a and R 6b are both alkyl, e.g., methyl.
  • R 6a and R 6b are joined to form an oxo group.
  • both R 11a and R 11b are hydrogen.
  • one of R 11a and R 11b is a non-hydrogen group.
  • R 11a and R 11b are joined to form an oxo group.
  • the compound of Formula (III) is of Formula (III-b1), (III-b2), or (III-b3):
  • R 1 is hydrogen, halogen (e.g., bromine), —OR A1 (e.g., —OH), —N(R A1 ) 2 , —S—S( ⁇ O) 2 R A2 , substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl.
  • R 1 is hydrogen, bromine, or —OH.
  • R 3 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 3′ is hydrogen.
  • both R 6a and R 6b are hydrogen.
  • one of R 6a and R 6b is a non-hydrogen group.
  • R 6a is a non-hydrogen alpha group.
  • R 6a is a non-hydrogen beta group.
  • R 6a is halo, e.g., fluoro, or alkyl.
  • R 6a is halo, e.g., fluoro, or alkyl
  • R 6b is hydrogen
  • R 6a and R 6b are both halo, e.g., fluoro.
  • R 6a and R 6b are both alkyl, e.g., methyl.
  • R 6a and R 6b are joined to form an oxo group.
  • both R 11a and R 11b are hydrogen.
  • one of R 11a and R 11b is a non-hydrogen group.
  • R 11a and R 11b are joined to form an oxo group.
  • the compound of Formula (I) is of Formula (I-c1), (I-c2), or (I-c3):
  • R 1 is hydrogen, halogen (e.g., bromine), —OR A1 (e.g., —OH), —N(R A1 ) 2 , —S—S( ⁇ O) 2 R A2 , substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl.
  • R 1 is hydrogen, bromine, or —OH.
  • R 3 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 3′ is hydrogen.
  • both R 6a and R 6b are hydrogen.
  • one of R 6a and R 6b is a non-hydrogen group.
  • R 6a is a non-hydrogen alpha group.
  • R 6a is a non-hydrogen beta group.
  • R 6a is halo, e.g., fluoro, or alkyl.
  • R 6a is halo, e.g., fluoro, or alkyl
  • R 6b is hydrogen
  • R 6a and R 6b are both halo, e.g., fluoro.
  • R 6a and R 6b are both alkyl, e.g., methyl.
  • R 6a and R 6b are joined to form an oxo group.
  • the compound of Formula (III) is of Formula (III-c1), (III-c2), or (III-c3):
  • R 1 is hydrogen, halogen (e.g., bromine), —OR A1 (e.g., —OH), —N(R A1 ) 2 , —S—S( ⁇ O) 2 R A2 , substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl.
  • R 1 is hydrogen, bromine, or —OH.
  • R 3 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 3′ is hydrogen.
  • both R 6a and R 6b are hydrogen.
  • one of R 6a and R 6b is a non-hydrogen group.
  • R 6a is a non-hydrogen alpha group.
  • R 6a is a non-hydrogen beta group.
  • R 6a is halo, e.g., fluoro, or alkyl.
  • R 6a is halo, e.g., fluoro, or alkyl
  • R 6b is hydrogen
  • R 6a and R 6b are both halo, e.g., fluoro.
  • R 6a and R 6b are both alkyl, e.g., methyl.
  • R 6a and R 6b are joined to form an oxo group.
  • the compound of Formula (I) is of Formula (I-d1), (I-d2), or (I-d3):
  • R 1 is hydrogen, halogen (e.g., bromine), —OR A1 (e.g., —OH), —N(R A1 ) 2 , —S—S( ⁇ O) 2 R A2 , substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl.
  • R 1 is hydrogen, bromine, or —OH.
  • R 3 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl. In certain embodiments, R 3 is hydrogen.
  • the compound of Formula (III) is of Formula (III-d1), (III-d2), or (III-d3):
  • R 1 is hydrogen, halogen (e.g., bromine), —OR A1 (e.g., —OH), —N(R A1 ) 2 , —S—S( ⁇ O) 2 R A2 , substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl.
  • R 1 is hydrogen, bromine, or —OH.
  • R 3 is substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl.
  • R 3′ is hydrogen.
  • R 1 is hydrogen, halogen, —OR A1 , —SR A1 , —N(R A1 ) 2 , —OC( ⁇ O)R A1 , —OC( ⁇ O)OR A1 , —OC( ⁇ O)SR A1 , —OC( ⁇ O)N(R A1 ) 2 , —SC( ⁇ O)R A2 , —SC( ⁇ O)OR A1 , —SC( ⁇ O)SR A1 , —SC( ⁇ O)N(R A1 ) 2 , NHC( ⁇ O)R A1 , —NHC( ⁇ O)OR A1 , —NHC( ⁇ O)SR A1 , —NHC( ⁇ O)N(R A1 ) 2 , —OS( ⁇ O) 2 R A2 , —OS( ⁇ O) 2 OR A1 , —S—S( ⁇ O) 2 R A2 , —S—S—S—S—S—S—S—S
  • the compound of Formula (I) is selected from any one of the following Formula:
  • the compound of Formula (I) is selected from any one of the following Formula:
  • the compound of Formula (I) is selected from any one of the following formulae:
  • the compound of Formula (I) is selected from any one of the following formulae:
  • each R 1c is independently —CH 3 , F, Cl, —CN, —OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • each R 1c is independently —CH 3 , F, Cl, —CN, —OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • m is 0, 1 or 2; and each R 1c is independently —CH 3 , Cl, F, —CN, —OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • m is 0. In certain embodiments m is 1. In certain embodiments m is 2. In certain embodiments, m is 1, and each R 1c is —CH 3 , Cl or —CN. In certain embodiments, m is 2, and each R 1c is —CH 3 , Cl or —CN.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • R 1c is H, —CH 3 , Cl, F, —CN, OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • X is —O— or —S—; and R 1c is independently H, —CH 3 , F, Cl, —CN, OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • the compound of Formula (I) is selected from any one of the following formulae:
  • the compound of Formula (I) is selected from any one of the following formulae:
  • each R 1c is independently —CH 3 , F, Cl, —CN, —OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • m is 0.
  • m is 1.
  • m is 2.
  • m is 2, and each R 1c is —CH 3 , Cl or —CN.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • each R 1c is independently —CH 3 , F, Cl, —CN, —OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • each R 1c is independently —CH 3 , F, Cl, —CN, —OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • R 1c is H, —CH 3 , Cl, —CN, —OMe, —SMe, —F, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • X is —O— or —S—; and R 1c is independently H, —CH 3 , F, Cl, —CN, —OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 ; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • each R 1c is independently H, —CH 3 , F, Cl, —CN, —OMe, —SMe, —SOMe, —SO 2 Me, —CH 2 F, —CHF 2 , or —CF 3 .
  • R 1c is —CH 3 , —CH 2 F, —CHF 2 , or —CF 3 .
  • R 1c is F, Cl, or CN.
  • R 1c is OMe.
  • R 1c is SMe, —SOMe, or —SO 2 Me.
  • X is —O—. In certain embodiments, X is —S—.
  • the compound of Formula (I) is selected from any one of the following formulae:
  • R 1 , R 2 , and R 3 are as described herein; or a pharmaceutically acceptable salt, solvate, hydrate, prodrug, stereoisomer, tautomer, isotopic variant, or N-oxide thereof, or a combination thereof.
  • the compound of Formula (I) is selected from any one of the following compounds, or a pharmaceutically acceptable salt, solvate, prodrug, stereoisomers, tautomer, isotopic variant, N-oxide thereof, or a combination thereof:
  • the compound of Formula (I) is selected from any one of the following compounds, or a pharmaceutically acceptable salt, solvate, prodrug, stereoisomers, tautomer, isotopic variant, N-oxide thereof, or a combination thereof:
  • the compound of Formula (I) is selected from any one of the following compounds, or a pharmaceutically acceptable salt, solvate, prodrug, stereoisomers, tautomer, isotopic variant, N-oxide thereof, or a combination thereof:
  • the compound of Formula (III) is selected from any one of the following compounds, or a pharmaceutically acceptable salt, solvate, prodrug, stereoisomers, tautomer, isotopic variant, N-oxide thereof, or a combination thereof:
  • the compound of Formula (III) is selected from any one of the following compounds, or a pharmaceutically acceptable salt, solvate, prodrug, stereoisomers, tautomer, isotopic variant, N-oxide thereof, or a combination thereof:
  • the compound of Formula (III) is selected from any one of the following compounds, or a pharmaceutically acceptable salt, solvate, prodrug, stereoisomers, tautomer, isotopic variant, N-oxide thereof, or a combination thereof:
  • the invention provides a pharmaceutical composition comprising a compound of the present invention and a pharmaceutically acceptable carrier.
  • the pharmaceutical composition comprises an effective amount of the compound.
  • the pharmaceutical composition comprises a therapeutically effective amount of the compound.
  • the pharmaceutical composition comprises a prophylactically effective amount of the compound.
  • compositions When employed as pharmaceuticals, the compounds provided herein are typically administered in the form of a pharmaceutical composition.
  • Such compositions can be prepared in a manner well known in the pharmaceutical art and comprise at least one active compound.
  • the carrier is a parenteral carrier, oral carrier, or topical carrier.
  • the present invention also relates to a compound of the present invention or pharmaceutical composition thereof for use as a pharmaceutical or a medicament.
  • the compounds provided herein are administered in a therapeutically effective amount.
  • the amount of the compound actually administered will typically be determined by a physician, in the light of the relevant circumstances, including the condition to be treated, the chosen route of administration, the actual compound administered, the age, weight, and response of the individual patient, the severity of the patient's symptoms, and the like.
  • compositions provided herein can be administered by a variety of routes including oral, rectal, transdermal, subcutaneous, intravenous, intramuscular, and intranasal.
  • routes including oral, rectal, transdermal, subcutaneous, intravenous, intramuscular, and intranasal.
  • the compounds provided herein are preferably formulated as either injectable or oral compositions or as salves, as lotions or as patches all for transdermal administration.
  • the pharmaceutical compositions provided herein can also be administered chronically (“chronic administration”).
  • Chronic administration refers to administration of a compound or pharmaceutical composition thereof over an extended period of time, e.g., for example, over 3 months, 6 months, 1 year, 2 years, 3 years, 5 years, etc, or may be continued indefinitely, for example, for the rest of the subject's life.
  • the chronic administration is intended to provide a constant level of the compound in the blood, e.g., within the therapeutic window over the extended period of time.
  • compositions for oral administration can take the form of bulk liquid solutions or suspensions, or bulk powders. More commonly, however, the compositions are presented in unit dosage forms to facilitate accurate dosing.
  • unit dosage forms refers to physically discrete units suitable as unitary dosages for human subjects and other mammals, each unit containing a predetermined quantity of active material calculated to produce the desired therapeutic effect, in association with a suitable pharmaceutical excipient.
  • Typical unit dosage forms include prefilled, premeasured ampules or syringes of the liquid compositions or pills, tablets, capsules or the like in the case of solid compositions.
  • the compound is usually a minor component (from about 0.1 to about 50% by weight or preferably from about 1 to about 40% by weight) with the remainder being various vehicles or carriers and processing aids helpful for forming the desired dosing form.
  • Liquid forms suitable for oral administration may include a suitable aqueous or nonaqueous vehicle with buffers, suspending and dispensing agents, colorants, flavors and the like.
  • Solid forms may include, for example, any of the following ingredients, or compounds of a similar nature: a binder such as microcrystalline cellulose, gum tragacanth or gelatin; an excipient such as starch or lactose, a disintegrating agent such as alginic acid, Primogel, or corn starch; a lubricant such as magnesium stearate; a glidant such as colloidal silicon dioxide; a sweetening agent such as sucrose or saccharin; or a flavoring agent such as peppermint, methyl salicylate, or orange flavoring.
  • a binder such as microcrystalline cellulose, gum tragacanth or gelatin
  • an excipient such as starch or lactose, a disintegrating agent such as alginic acid, Primogel, or corn starch
  • Injectable compositions are typically based upon injectable sterile saline or phosphate-buffered saline or other injectable carriers known in the art.
  • the active compound in such compositions is typically a minor component, often being from about 0.05 to 10% by weight with the remainder being the injectable carrier and the like.
  • Transdermal compositions are typically formulated as a topical ointment or cream containing the active ingredient(s), generally in an amount ranging from about 0.01 to about 20% by weight, preferably from about 0.1 to about 20% by weight, preferably from about 0.1 to about 10% by weight, and more preferably from about 0.5 to about 15% by weight.
  • the active ingredients When formulated as a ointment, the active ingredients will typically be combined with either a paraffinic or a water-miscible ointment base. Alternatively, the active ingredients may be formulated in a cream with, for example an oil-in-water cream base.
  • Such transdermal formulations are well-known in the art and generally include additional ingredients to enhance the dermal penetration of stability of the active ingredients or Formulation. All such known transdermal formulations and ingredients are included within the scope provided herein.
  • transdermal administration can be accomplished using a patch either of the reservoir or porous membrane type, or of a solid matrix variety.
  • the compounds of this invention can also be administered in sustained release forms or from sustained release drug delivery systems.
  • sustained release materials can be found in Remington's Pharmaceutical Sciences.
  • the present invention also relates to the pharmaceutically acceptable formulations of a compound of the present invention.
  • the formulation comprises water.
  • the formulation comprises a cyclodextrin derivative.
  • the most common cyclodextrins are ⁇ -, ⁇ - and ⁇ -cyclodextrins consisting of 6, 7 and 8 ⁇ -1,4-linked glucose units, respectively, optionally comprising one or more substituents on the linked sugar moieties, which include, but are not limited to, methylated, hydroxyalkylated, acylated, and sulfoalkylether substitution.
  • the cyclodextrin is a sulfoalkyl ether ⁇ -cyclodextrin, e.g., for example, sulfobutyl ether ⁇ -cyclodextrin, also known as Captisol®. See, e.g., U.S. Pat. No. 5,376,645.
  • the formulation comprises hexapropyl- ⁇ -cyclodextrin (e.g., 10-50% in water).
  • the present invention also relates to the pharmaceutically acceptable acid addition salt of a compound of the present invention.
  • the acid which may be used to prepare the pharmaceutically acceptable salt is that which forms a non-toxic acid addition salt, i.e., a salt containing pharmacologically acceptable anions such as the hydrochloride, hydroiodide, hydrobromide, nitrate, sulfate, bisulfate, phosphate, acetate, lactate, citrate, tartrate, succinate, maleate, fumarate, benzoate, para-toluenesulfonate, and the like.
  • a non-toxic acid addition salt i.e., a salt containing pharmacologically acceptable anions such as the hydrochloride, hydroiodide, hydrobromide, nitrate, sulfate, bisulfate, phosphate, acetate, lactate, citrate, tartrate, succinate, maleate, fumarate, benzoate, para-toluen
  • a compound of the present invention may be admixed as a dry powder with a dry gelatin binder in an approximate 1:2 weight ratio.
  • a minor amount of magnesium stearate is added as a lubricant.
  • the mixture is formed into 240-270 mg tablets (80-90 mg of active compound per tablet) in a tablet press.
  • a compound of the present invention may be admixed as a dry powder with a starch diluent in an approximate 1:1 weight ratio. The mixture is filled into 250 mg capsules (125 mg of active compound per capsule).
  • a compound of the present invention (125 mg) may be admixed with sucrose (1.75 g) and xanthan gum (4 mg) and the resultant mixture may be blended, passed through a No. 10 mesh U.S. sieve, and then mixed with a previously made solution of microcrystalline cellulose and sodium carboxymethyl cellulose (11:89, 50 mg) in water.
  • Sodium benzoate (10 mg) flavor, and color are diluted with water and added with stirring. Sufficient water may then be added to produce a total volume of 5 mL.
  • a compound of the present invention may be admixed as a dry powder with a dry gelatin binder in an approximate 1:2 weight ratio.
  • a minor amount of magnesium stearate is added as a lubricant.
  • the mixture is formed into 450-900 mg tablets (150-300 mg of active compound) in a tablet press.
  • a compound of the present invention may be dissolved or suspended in a buffered sterile saline injectable aqueous medium to a concentration of approximately 5 mg/mL.
  • a compound of the present invention may be admixed as a dry powder with a dry gelatin binder in an approximate 1:2 weight ratio.
  • a minor amount of magnesium stearate is added as a lubricant.
  • the mixture is formed into 90-150 mg tablets (30-50 mg of active compound per tablet) in a tablet press.
  • a compound of the present invention may be admixed as a dry powder with a dry gelatin binder in an approximate 1:2 weight ratio.
  • a minor amount of magnesium stearate is added as a lubricant.
  • the mixture is formed into 30-90 mg tablets (10-30 mg of active compound per tablet) in a tablet press.
  • a compound of the present invention may be admixed as a dry powder with a dry gelatin binder in an approximate 1:2 weight ratio.
  • a minor amount of magnesium stearate is added as a lubricant.
  • the mixture is formed into 0.3-30 mg tablets (0.1-10 mg of active compound per tablet) in a tablet press.
  • a compound of the present invention may be admixed as a dry powder with a dry gelatin binder in an approximate 1:2 weight ratio.
  • a minor amount of magnesium stearate is added as a lubricant.
  • the mixture is formed into 150-240 mg tablets (50-80 mg of active compound per tablet) in a tablet press.
  • a compound of the present invention may be admixed as a dry powder with a dry gelatin binder in an approximate 1:2 weight ratio.
  • a minor amount of magnesium stearate is added as a lubricant.
  • the mixture is formed into 270-450 mg tablets (90-150 mg of active compound per tablet) in a tablet press.
  • Injection dose levels range from about 0.1 mg/kg/hour to at least 10 mg/kg/hour, all for from about 1 to about 120 hours and especially 24 to 96 hours.
  • a preloading bolus of from about 0.1 mg/kg to about 10 mg/kg or more may also be administered to achieve adequate steady state levels.
  • the maximum total dose is not expected to exceed about 2 g/day for a 40 to 80 kg human patient.
  • each dose provides from about 0.01 to about 20 mg/kg of the compound provided herein, with preferred doses each providing from about 0.1 to about 10 mg/kg, and especially about 1 to about 5 mg/kg.
  • Transdermal doses are generally selected to provide similar or lower blood levels than are achieved using injection doses.
  • the compounds provided herein When used to prevent the onset of a CNS-disorder, the compounds provided herein will be administered to a subject at risk for developing the condition, typically on the advice and under the supervision of a physician, at the dosage levels described above.
  • Subjects at risk for developing a particular condition generally include those that have a family history of the condition, or those who have been identified by genetic testing or screening to be particularly susceptible to developing the condition.
  • the compounds and pharmaceutical compositions provided herein find use as therapeutics for preventing and/or treating CNS conditions in mammals including humans and non-human mammals.
  • the present invention includes within its scope, and extends to, the recited methods of treatment, as well as to the compounds for such methods, and to the use of such compounds for the preparation of medicaments useful for such methods.
  • compounds of the present invention are contemplated as therapeutic agents, e.g., for the treatment of CNS conditions in mammals, such as for the treatment of insomnia, depression, mood disorders, convulsive disorders, memory disorders, attention disorders, anxiety disorders (e.g., stress), bipolar disorder (e.g., I and/or II), schizophrenia, depression, bipolar disorder, schizoaffective disorder, mood disorders, anxiety disorders, personality disorders, psychosis, compulsive disorders, post-traumatic stress disorder (PTSD), Autism spectrum disorder (ASD), dysthymia (mild depression), social anxiety disorder, obsessive compulsive disorder (OCD), pain (e.g., a painful syndrome or disorder, e.g., acute pain, chronic pain, neuropathic pain), sleep disorders, memory disorders, dementia, Alzheimer's disease, a seizure disorder (e.g., epilepsy), traumatic brain injury, stroke, addictive disorders (e.g., addiction to opiates, cocaine, and/or alcohol), autism, Hunt
  • the compounds of the present invention are useful in the treatment of depression, anxiety, mood disorders, sleep disorders, memory disorders, traumatic brain injury, stroke, epilepsy, and schizophrenia.
  • a method of treating a mammal susceptible to or afflicted with a condition associated with brain excitability comprises administering an effective amount of one or more of the pharmaceutical compositions described herein.
  • a compound of the present invention as a pharmaceutical, e.g., especially in the treatment or prevention of the aforementioned conditions and diseases.
  • a method of manufacture of a medicament for the treatment or prevention of one of the aforementioned conditions and diseases is provided.
  • the present invention provides a method for preventing, treating, ameliorating, or managing a disease or condition which comprises administering to a subject in need of such prevention, treatment, amelioration or management, a prophylactically or therapeutically effective amount of a compound of the present invention, or the pharmaceutical composition thereof.
  • the present invention provides a method of treatment of a mammal, e.g., a human being, to treat a disease associated with brain excitability, including treating said mammal with an effective amount of a compound of the present invention or composition thereof.
  • the present invention provides a use of a compound of the present invention, or composition thereof, for the manufacture of a medicament to treat a disease or condition associated with CNS in a subject.
  • the disease or condition is selected from, sleep disorders, mood disorders, insomnia, anxiety, depression, TBI, stress, and epilepsy.
  • the present invention provides method of in vitro modulation of GABA A receptor-chloride ionophore complex in a subject through binding to the neurosteroid site on said complex, comprising administering to the subject an amount effective to modulate said complex of a compound of the present invention.
  • the present invention provides method of alleviating or preventing seizure activity in a subject, comprising administering to the subject in need of such treatment an effective amount of a compound of the present invention, or a composition thereof.
  • the present invention provides method of alleviating or preventing insomnia in a subject, comprising administering to the subject in need of such treatment an effective amount of a compound of the present invention, or a composition thereof.
  • the present invention provides method of inducing sleep and maintaining substantially the level of REM sleep that is found in normal sleep, wherein substantial rebound insomnia is not induced, comprising administering an effective amount of a compound of the present invention, or a composition thereof.
  • the present invention provides method of treating or preventing mood disorders in a subject, comprising administering to the subject in need of such treatment an effective amount of a compound of the present invention, or a composition thereof.
  • the mood disorder is depression.
  • the present invention provides a method of inducing anesthesia in a subject, comprising administering to the subject an effective amount of a compound of the present invention.
  • the subject is a human.
  • the compound is a pharmaceutically acceptable 3-ester or 3-diester of an acid selected from the group consisting of acetic, propionic, maleic, fumaric, ascorbic, pimelic, succinic, glutaric, bismethylenesalicylic, methanesulfonic, ethane-di-sulfonic, oxalic, tartaric, salicylic, citric, gluconic, itaconic, glycolic, ⁇ -aminobenzoic, aspartic, glutamic, ⁇ -amino-butyric, ⁇ -(2-hydroxyethylamino)-propionic, glycine and other ⁇ -amino acids, phosphoric, sulfuric, glucuronic, and 1-methyl-1,4-d
  • the present invention provides a method of cognition enhancement or treating memory disorder by administering to the subject a therapeutically effective amount of a compound of the present invention.
  • the disorder is Alzheimer's disease.
  • the disorder is Rett syndrome.
  • the present invention provides a method of of treating attention disorders by administering to the subject a therapeutically effective amount of a compound of the present invention.
  • the attention disorder is ADHD.
  • the compound is administered to the subject chronically. In certain embodiments, the compound is administered to the subject orally.
  • the compounds provided herein can be prepared from readily available starting materials using the following general methods and procedures. See, e.g., Synthetic Schemes below. It will be appreciated that where typical or preferred process conditions (i.e., reaction temperatures, times, mole ratios of reactants, solvents, pressures, etc.) are given, other process conditions can also be used unless otherwise stated. Optimum reaction conditions may vary with the particular reactants or solvent used, but such conditions can be determined by one skilled in the art by routine optimization procedures.
  • the compounds provided herein may be isolated and purified by known standard procedures. Such procedures include (but are not limited to) recrystallization, column chromatography, or HPLC. The following schemes are presented with details as to the preparation of representative substituted biarylamides that have been listed herein.
  • the compounds provided herein may be prepared from known or commercially available starting materials and reagents by one skilled in the art of organic synthesis.
  • the enantiomerically pure compounds provided herein may be prepared according to any techniques known to those of skill in the art. For instance, they may be prepared by chiral or asymmetric synthesis from a suitable optically pure precursor or obtained from a racemate by any conventional technique, for example, by chromatographic resolution using a chiral column, TLC or by the preparation of diastereoisomers, separation thereof and regeneration of the desired enantiomer. See, e.g., Enantiomers, Racemates and Resolutions , by J. Jacques, A. Collet, and S. H. Wilen, (Wiley-Interscience, New York, 1981); S. H. Wilen, A. Collet, and J. Jacques, Tetrahedron, 2725 (1977); E.
  • an enantiomerically pure compound of Formula (I) may be obtained by reaction of the racemate with a suitable optically active acid or base.
  • suitable acids or bases include those described in Bighley et al., 1995, Salt Forms of Drugs and Adsorption , in Encyclopedia of Pharmaceutical Technology , vol. 13, Swarbrick & Boylan, eds., Marcel Dekker, New York; ten Hoeve & H. Wynberg, 1985 , Journal of Organic Chemistry 50:4508-4514; Dale & Mosher, 1973 , J. Am. Chem. Soc. 95:512; and CRC Handbook of Optical Resolution via Diastereomeric Salt Formation , the contents of which are hereby incorporated by reference in their entireties.
  • Enantiomerically pure compounds can also be recovered either from the crystallized diastereomer or from the mother liquor, depending on the solubility properties of the particular acid resolving agent employed and the particular acid enantiomer used.
  • the identity and optical purity of the particular compound so recovered can be determined by polarimetry or other analytical methods known in the art.
  • the diasteroisomers can then be separated, for example, by chromatography or fractional crystallization, and the desired enantiomer regenerated by treatment with an appropriate base or acid.
  • the other enantiomer may be obtained from the racemate in a similar manner or worked up from the liquors of the first separation.
  • enantiomerically pure compound can be separated from racemic compound by chiral chromatography.
  • Various chiral columns and eluents for use in the separation of the enantiomers are available and suitable conditions for the separation can be empirically determined by methods known to one of skill in the art.
  • Exemplary chiral columns available for use in the separation of the enantiomers provided herein include, but are not limited to, CHIRALCEL® OB, CHIRALCEL® OB-H, CHIRALCEL® OD, CHIRALCEL® OD-H, CHIRALCEL® OF, CHIRALCEL® OG, CHIRALCEL® OJ, and CHIRALCEL® OK.
  • the compounds of the invention can be prepared in accordance with methods described in the art (Upasani et al., J. Med. Chem. 1997, 40:73-84; and Hogenkamp et al., J . Med. Chem. 1997, 40:61-72) and using the appropriate reagents, starting materials, and purification methods known to those skilled in the art. A few representative methods are depicted below. In any of the Schemes, depicted below, the compounds may be either 5 ⁇ - or 5 ⁇ -isomers.
  • Base may be K—O-t-Bu.
  • Compound 9a 1 H NMR (400 MHz, CDCl3), ⁇ (ppm), 3.38-3.43 (m, 5H), 2.52-2.56 (m, 1H), 2.16 (s, 3H), 0.60 (s, 3H).
  • Compound 9b 1 H NMR (400 MHz, CDCl3), ⁇ (ppm), 3.39 (s, 3H), 3.20 (s, 2H), 2.48-2.54 (m, 1H), 2.70 (s, 3H), 0.61 (s, 3H).
  • 65a 1H NMR (400 MHz, CDCl 3 ), ⁇ (ppm), 3.38 (s, 3H), 3.18 (s, 2H), 2.56-2.51 (m, 1H), 2.11 (s, 3H), 0.61 (s, 3H).
  • 65b 1H NMR (400 MHz, CDCl 3 ), ⁇ (ppm), 3.40 (s, 3H), 3.37 (s, 2H), 2.54-2.50 (m, 1H), 2.11 (s, 3H), 0.62 (s, 3H).
  • cortices are rapidly removed following decapitation of carbon dioxide-anesthetized Sprague-Dawley rats (200-250 g).
  • the cortices are homogenized in 10 volumes of ice-cold 0.32 M sucrose using a glass/teflon homogenizer and centrifuged at 1500 ⁇ g for 10 min at 4° C.
  • the resultant supernatants are centrifuged at 10,000 ⁇ g for 20 min at 4° C. to obtain the P2 pellets.
  • the P2 pellets are resuspended in 200 mM NaCl/50 mM Na—K phosphate pH 7.4 buffer and centrifuged at 10,000 ⁇ g for 10 min at 4° C.
  • mice Male NSA mice weighing between 15-20 g are obtained from Harlan Sprague-Dawley (San Diego, Calif.). Upon arrival they are housed in standard polycarbonate cages (4 per cage) containing a sterilized bedding material in a room of constant temp (23.0° ⁇ 2.5° C.) with a 12 h (07.00-19.00 light) light/dark cycle. Food (Teklad LM 485) and water are freely available. Mice are acclimated a minimum of 4 days prior to experimentation.
  • Seizures are induced by administration of 85 mg/kg, s.c. pentylenetetrazol (30 min observation period). The dose used is previously determined to be the CD 97 .
  • a clonic seizure is defined as forelimb clonus of >3 sec duration. Data are treated quantally.
  • Seizures are induced by application of current (50 mA, 60 pulses/sec, 0.8 msec pulse width, 1 sec duration, D.C.) using a Ugo Basile ECT device (Model 7801). Mice are restrained by gripping the loose skin on their dorsal surface and saline-coated corneal electrodes are held lightly against the two cornea. Current is applied and mice are observed for a period of up to 30 sec for the occurrence of a tonic hindlimb extensor response. A tonic seizure is defined as a hindlimb extension in excess of 90 degrees from the plane of the body. Results are treated in a quantal manner.
  • the hanging-wire test used a custom-built apparatus that consisted of a metal wire (2 mm diameter) suspended horizontally above a padded surface (25 cm). Mice are held by the base of the tail, their forepaws placed in contact with the wire, and then released. Animals are required to bring both hindpaws in contact with the wire within 5 sec in order to be scored as a pass. Results are treated quantally.
  • HEK 293 cells which stably express the HERG potassium channel are used for electrophysiological studies.
  • the methodology for stable transfection of this channel in HEK cells can be found elsewhere (Zhou et al., Biophys. J. 74:230-41, 1998).
  • MEM Minimum Essential Medium
  • FCS Fetal Calf Serum
  • HERG currents are studied using standard patch clamp techniques in the whole-cell mode.
  • the cells are superfused with a standard external solution of the following composition (mM); NaCl, 130; KCl, 4; CaC12, 2; MgCl 2 , 1; Glucose, 10; HEPES, 5; pH 7.4 with NaOH.
  • mM standard external solution of the following composition
  • KCl, 130; MgATP, 5; MgCl 2 , 1.0; HEPES, 10; EGTA 5, pH 7.2 with KOH a standard external solution of the following composition (mM); KCl, 130; MgATP, 5; MgCl 2 , 1.0; HEPES, 10; EGTA 5, pH 7.2 with KOH.
  • the voltage protocol is applied to a cell continuously throughout the experiment every 4 seconds (0.25 Hz).
  • the amplitude of the peak current elicited around ⁇ 40 mV during the ramp is measured.
  • vehicle (0.5% DMSO in the standard external solution) is applied for 10-20 min by a peristalic pump.
  • the test compound of either 0.3, 1, 3, or 10 mM is applied for a 10 min period.
  • the 10 min period included the time which supplying solution was passing through the tube from solution reservoir to the recording chamber via the pump.
  • Exposing time of cells to the compound solution was more than 5 min after the drug concentration in the chamber well reached the attempting concentration. There is a subsequent wash period of a 10-20 min to assess reversibility. Finally, the cells is exposed to high dose of dofetilide (5 mM), a specific IKr blocker, to evaluate the insensitive endogenous current.
  • dofetilide 5 mM
  • GABA EC10 0.5 ⁇ M
  • Emax potency, efficacy
  • Test article is added at 0.1, 1.0 and 10 uM.
  • Test compounds (1 ⁇ M) are incubated with 3.3 mM MgCl 2 and 0.78 mg/mL HLM (HL101) in 100 mM potassium phosphate buffer (pH 7.4) at 37° C. on the 96-deep well plate.
  • the reaction mixture is split into two groups, a non-P450 and a P450 group.
  • NADPH is only added to the reaction mixture of the P450 group.
  • An aliquot of samples of P450 group is collected at 0, 10, 30, and 60 min time point, where 0 min time point indicated the time when NADPH was added into the reaction mixture of P450 group.
  • An aliquot of samples of non-P450 group is collected at ⁇ 10 and 65 min time point.
  • the invention encompasses all variations, combinations, and permutations in which one or more limitations, elements, clauses, and descriptive terms from one or more of the listed claims is introduced into another claim.
  • any claim that is dependent on another claim can be modified to include one or more limitations found in any other claim that is dependent on the same base claim.
  • elements are presented as lists, e.g., in Markush group format, each subgroup of the elements is also disclosed, and any element(s) can be removed from the group. It should it be understood that, in general, where the invention, or aspects of the invention, is/are referred to as comprising particular elements and/or features, certain embodiments of the invention or aspects of the invention consist, or consist essentially of, such elements and/or features.

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