WO2005040126A1 - Substituted dibenzo-azepine and benzo-diazepine derivatives useful as gamma-secretase inhibitors - Google Patents

Substituted dibenzo-azepine and benzo-diazepine derivatives useful as gamma-secretase inhibitors Download PDF

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Publication number
WO2005040126A1
WO2005040126A1 PCT/EP2004/010821 EP2004010821W WO2005040126A1 WO 2005040126 A1 WO2005040126 A1 WO 2005040126A1 EP 2004010821 W EP2004010821 W EP 2004010821W WO 2005040126 A1 WO2005040126 A1 WO 2005040126A1
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Prior art keywords
oxo
dibenzo
methyl
azepin
dihydro
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PCT/EP2004/010821
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French (fr)
Inventor
Alexander Flohr
Guido Galley
Roland Jakob-Roetne
Eric Argirios Kitas
Jens-Uwe Peters
Wolfgang Wostl
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F. Hoffman-La Roche Ag
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Priority to SI200432267T priority Critical patent/SI1673347T1/en
Priority to JP2006530028A priority patent/JP4503607B2/en
Application filed by F. Hoffman-La Roche Ag filed Critical F. Hoffman-La Roche Ag
Priority to CA2541470A priority patent/CA2541470C/en
Priority to CN2004800333748A priority patent/CN1894217B/en
Priority to BRPI0415070A priority patent/BRPI0415070B8/en
Priority to PL04787028T priority patent/PL1673347T3/en
Priority to MXPA06003870A priority patent/MXPA06003870A/en
Priority to NZ546036A priority patent/NZ546036A/en
Priority to EP04787028.2A priority patent/EP1673347B1/en
Priority to ES04787028.2T priority patent/ES2548720T3/en
Priority to DK04787028.2T priority patent/DK1673347T3/en
Priority to AU2004283803A priority patent/AU2004283803B2/en
Publication of WO2005040126A1 publication Critical patent/WO2005040126A1/en
Priority to IL174513A priority patent/IL174513A/en
Priority to NO20061469A priority patent/NO20061469L/en
Priority to HRP20151197TT priority patent/HRP20151197T1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • 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
    • A61P25/28—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
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D223/00—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
    • C07D223/14—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
    • C07D223/16—Benzazepines; Hydrogenated benzazepines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D223/00—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
    • C07D223/14—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
    • C07D223/18—Dibenzazepines; Hydrogenated dibenzazepines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D243/00—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms
    • C07D243/06—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4
    • C07D243/10—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems
    • C07D243/12—1,5-Benzodiazepines; Hydrogenated 1,5-benzodiazepines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D243/00—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms
    • C07D243/06—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4
    • C07D243/10—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems
    • C07D243/14—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D243/00—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms
    • C07D243/06—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4
    • C07D243/10—Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms having the nitrogen atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems
    • C07D243/14—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines
    • C07D243/16—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines substituted in position 5 by aryl radicals
    • C07D243/18—1,4-Benzodiazepines; Hydrogenated 1,4-benzodiazepines substituted in position 5 by aryl radicals substituted in position 2 by nitrogen, oxygen or sulfur atoms
    • C07D243/24—Oxygen atoms

Definitions

  • the invention relates to compounds of formula
  • R 1 is -(CHR') q -aryl or -(CHR') q -heteroaryl, which are unsubstituted or mono, di- or tri-substituted by lower alkyl, lower alkoxy, CF 3 or halogen, or is lower alkyl, lower alkenyl, -(CH 2 ) n -Si(CH 3 ) 3.
  • R' is hydrogen or lower alkyl
  • R 2 is hydrogen or lower alkyl
  • R 3 is hydrogen, lower alkyl, -CH 2 CF 2 CF 3. CH 2 CF 3 . (CH 2 ) 2 CF 3 , CF 3 , CHF 2 , CH 2 F, or is aryl, optionally mono, di or tri-substituted by halogen, or is -(CH 2 )__NR 5 R 6 . wherein R 5 and R 6 are independently from each other hydrogen or lower alkyl; R is one of the following groups
  • R 7 is hydrogen, lower alkyl, -(CH 2 ) n -CF 3 or -(CH 2 ) n -cycloalkyl
  • R 8 is hydrogen, lower alkyl, -C(O)-phenyl, -C(O)-lower alkyl, -C(O)O-(CH 2 ) n - cycloalkyl, -C(O)O-(CH 2 ) n -lower alkyl, -C(O)NH-(CH 2 ) n -lower alkyl or -C(O)NH-(CH 2 ) n -cydoalkyl;
  • R 9 is hydrogen, lower alkyl, -(CH 2 ) n -cycloalkyl or -(CH 2 ) n -CF 3 ;
  • lower alkyl denotes a saturated straight- or branched- chain alkyl group containing from 1 to 10 carbon atoms, for example, methyl, ethyl, propyl, isopropyl, n-butyl, i-butyl, 2-butyl, t-butyl and the like.
  • Preferred lower alkyl groups are groups with 1 - 4 carbon atoms.
  • lower alkenyl denotes a partially saturated straight- or branched-chain carbon group containing at least one double bond with 2 to 10 carbon atoms, for example ethenyl, but-2-enyl or 3,7-dimethyl-octa-2,6-dienyl.
  • cycloalkyl denotes a saturated carbocyclic group, containing 3 - 7 carbon atoms.
  • lower alkoxy denotes a group wherein the alkyl residues is as
  • aryl denotes a monovalent cyclic aromatic hydrocarbon radical consisting of one or more fused rings, in which at least one ring is aromatic in nature, for example phenyl or naphthyl.
  • heteroaryl denotes a monovalent heterocyclic aromatic radical, for example pyridyl, pyrazinyl, pyrimidinyl, triazinyl, thiazolyl, thiophenyl, furyl, pyrazol, pyrrolyl, imidazolyl or the like.
  • halogen denotes chlorine, iodine, fluorine and bromine.
  • pharmaceutically acceptable acid addition salts embraces salts with inorganic and organic acids, such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, citric acid, formic acid, fumaric acid, maleic acid, acetic acid, succinic acid, tartaric acid, methane-sulfonic acid, p-toluenesulfonic acid and the like.
  • the compounds of general formula I are ⁇ -secretase inhibitors and the related compounds maybe useful in the treatment of Alzheimer's disease.
  • AD Alzheimer's disease
  • Pathologically AD is characterized by the deposition in the brain of amyloid in extracellular plaques and intracellular neurofibrillary tangles.
  • the amyloid plaques are mainly composed of amyloid peptides (Abeta peptides) which originate from the ⁇ - Amyloid Precursor Protein (APP) by a series of proteolytic cleavage steps.
  • APP Amyloid Precursor Protein
  • APP Amyloid Precursor Protein
  • Several forms of APP have been identified of which the most abundant are proteins of 695, 751 and 770 amino acids length. They all arise from a single gene through differential splicing.
  • the Abeta peptides are derived from the same domain of the APP but differ at their N- and C-termini, the main species are of 40 and 42 amino-acid length.
  • Abeta peptides are produced from APP through the sequential action of 2 proteolytic enzymes termed ⁇ - and ⁇ -secretase.
  • ⁇ -Secretase cleaves first in the extracellular domain of APP just outside of the trans-membrane domain (TM) to produce a C-terminal fragment of APP containing the TM- and cytoplasmatic domain (CTF ⁇ ).
  • CTF ⁇ is the substrate for ⁇ -secretase which cleaves at several adjacent positions within the TM to produce the A ⁇ peptides and the cytoplasmic fragment.
  • the majority of Abeta peptides is of 40 amino acids length (A ⁇ 40), a minor species carries 2 additional amino acids at its C-terminus. Latter is supposed to be the more pathogenic amyloid peptide.
  • the ⁇ -secretase is a typical aspartyl protease.
  • the ⁇ -secretase has a proteolytic activity consisting of several proteins, its exact composition is incompletely understood. However, the presenilins are essential components of this activity and may represent a new group of atypical aspartyl proteases which cleave their substrates within the TM and which are themselves polytopic membrane proteins. Other essential components of ⁇ - secretase are be nicastrin and the products of the aphl and pen-2 genes.
  • Proven substrates for ⁇ -secretase are the APP and the proteins of the Notch receptor family, however, ⁇ -secretase has a loose substrate specificity and may cleave further membrane proteins unrelated to APP and Notch.
  • the ⁇ -secretase activity is absolutely required for the production of Abeta peptides. This has been shown both by genetic means, i.e., ablation of the presenilin genes and by low-molecular- weight inhibitory compounds. Since according to the amyloid hypothesis the production and deposition of Abeta is the ultimate cause for AD, it is thought that selective and potent inhibitors of ⁇ -secretase will be useful for the prevention and treatment of AD.
  • the compounds of this invention will be useful treating AD by blocking the activity of ⁇ -secretase and reducing or preventing the formation of the various amyloidogenic Abeta peptides.
  • Objects of the present invention are the compounds of formula I per se, the use of compounds of formula I and their pharmaceutically acceptable salts for the manufacture of medicaments for the treatment of diseases, related to the ⁇ -secretase inhibition, their manufacture, medicaments based on a compound in accordance with the invention and their production as well as the use of compounds of formula I in the control or prevention of Alzheimer's disease.
  • a further object of the invention are all forms of optically pure enantiomers, racemates or diastereomeric mixtures for compounds of formula I.
  • the most preferred compounds of formula I are those, wherein R 4 is a).
  • Especially preferred compounds from this group are those, wherein R 1 is -CH 2 -phenyl, unsubstituted or mono, di- or tri-substituted by lower alkyl, lower alkoxy, CF 3 or halogen, for example the following compounds:
  • Compounds of such groups are for example (2,2.3.3,3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-benzoyl-l-methyl-2 ⁇ oxo- 2,3,4,5-tetrahydro- lH-benzo [b] [ 1,4] diazepin-3-ylcarbamoyl)-ethyl ester (2,2,3,3,3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-acetyl-l-methyl-2-oxo- 2,3,4,5-tetrahydro-lH-benzo[b] [1 .
  • One embodiment of the present invention are further those compounds of formula I-l,
  • R 1 is -(CH 2 ) n -aryl or -(CH 2 ) n -heteroaryl, which are unsubstituted or mono, di- or tri- substituted by lower alkyl, lower alkoxy, CF 3 or halogen, or is lower alkyl, -(CH 2 ) n -O-lower alkyl, -(CH 2 ) n -S-lower alkyl, -(CH 2 ) n -cycloalkyl, -(CH 2 ) n -CH 2 F, -(CH 2 ) n -CF 3 , -(CH 2 ) n -CF 2 -CF 3 . -(CH 2 ) n -CF 2 -CHF 25 -(CH 2 )__-CR 2 -CF 3 , and wherein the two R radicals form together with the carbon atom a cycloalkyl ring;
  • R 2 is hydrogen or lower alkyl
  • R 3 is hydrogen, lower alkyl, -CH 2 F, CHF 2 , CF 3 , aryl, optionally mono, di or tri- substituted by halogen, or is -(CH 2 ) n NR 5 R 6 .
  • R 5 and R 6 are independently from each other hydrogen or lower alkyl; R is one of the following groups
  • R 7 is lower alkyl or -(CH) 2 -cycloalkyl
  • R 8 , R 9 are independently from each other hydrogen, lower alkyl, -(CH 2 ) n -cycloalkyl or -C(O) -phenyl;
  • present compounds of formula I and their pharmaceutically acceptable salts can be prepared by methods known in the art, for example, by processes described below, which processes comprise a) reacting a compound of formula
  • R 1 - R have the meaning as described above, or b) reacting a compound of formula
  • phosgene equivalent such as 4-nitrophenyl chloroformate
  • base such as triethylamine
  • R 1 - R have the meaning as described above, and if desired, converting the compounds obtained into pharmaceutically acceptable acid addition salts.
  • An hydroxy-acid of formula V is suitably activated, for instance with a coupling agent such as EDC (l-(3-dimethylaminopropyl)-3-ethylcarbodiimide), and converted with an amine of formula VI to an intermediate hydroxy compound of formula IV.
  • a coupling agent such as EDC (l-(3-dimethylaminopropyl)-3-ethylcarbodiimide)
  • EDC l-(3-dimethylaminopropyl)-3-ethylcarbodiimide
  • an intermediate hydroxy compound of formula IV This can be transformed into a compound of formula la by reaction with an isocyanate of formula III.
  • a compound of formula IV can be transformed into a compound of formula I by reaction with a suitable phosgene equivalent and a base, such as 4- nitrophenyl chloroformate and triethylamine, and an amine of formula II.
  • the conversion is accomplished by treatment with at least a stoichiometric amount of an appropriate acid, such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid and the like, and organic acids suchas acetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, malic acid, malonic acid, succinic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, p-toluenesulfonic acid, salicylic acid and the like.
  • an appropriate acid such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid and the like
  • organic acids suchas acetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, malic acid, malonic acid
  • the free base is dissolved in an inert organic solvent such as diethyl ether, ethyl acetate, chloroform, ethanol or methanol and the like, and the acid added in a similar solvent.
  • an inert organic solvent such as diethyl ether, ethyl acetate, chloroform, ethanol or methanol and the like.
  • the temperature is maintained between 0 °C and 50 °C.
  • the resulting salt precipitates spontaneously or maybe brought out of solution with a less polar solvent.
  • the acid addition salts of compounds of formula I maybe converted to the corresponding free bases by treatment with at least a stoichiometric equivalent of a suitable base such as sodium or potassium hydroxide, potassium carbonate, sodium bicarbonate, ammonia, and the like.
  • a suitable base such as sodium or potassium hydroxide, potassium carbonate, sodium bicarbonate, ammonia, and the like.
  • the compounds of formula I and their pharmaceutically usable addition salts possess valuable pharmacological properties. Specifically, it has been found that the compounds of the present invention may inhibit the ⁇ -secretase.
  • the compounds were investigated in accordance with the test given hereinafter.
  • test compounds can be evaluated in assays which measure the proteolytic cleavage of suitable substrates by ⁇ -secretase activity.
  • assays which measure the proteolytic cleavage of suitable substrates by ⁇ -secretase activity.
  • ⁇ -secretase activity can also be determined in a cellular assay where e.g., a substrate of the ⁇ -secretase is fused in its cytoplasmic domain to a transcription factor.
  • Cells are transfected with this fusion gene and a reporter gene, e.g., firefly luciferase, which expression is enhanced by the transcription factor. Cleavage of the fused substrate by ⁇ -secretase will lead to expression of the reporter gene which can be monitored in appropriate assays.
  • the ⁇ -secretase activity can also be determined in a cellular assay where e.g.
  • HEK293 cells are transfected with a vector which expresses the cDNA for the human APP and which secrete Abeta peptides into the culture medium.
  • the amount of secreted peptides can be determined with specific ELISA assays.
  • Cell lines of neuronal origin secrete Abeta peptides from their endogenous APP gene which can be measured with the specific ELISA assay.
  • Treatment with compounds which inhibit ⁇ - secretase leads to a reduction of secreted Abeta thus providing a measure of inhibition.
  • a cell-free assay of ⁇ -secretase activity uses a HEK293 membrane fraction as a source of ⁇ -secretase and a recombinant APP substrate.
  • Latter consist of the C-terminal 100 amino acids of human APP fused to a 6x Histidin tail for purification which is expressed in E.coli in a regulatable expression vector, e.g. pEtl5.
  • This recombinant protein corresponds to the truncated APP fragment which results after ⁇ -secretase cleavage of the extracellular domain and which constitutes the ⁇ -secretase substrate.
  • the assay principle is described in Li YM et al, PNAS 97(11), 6138-6143 (2000). Hek293 cells are mechanically disrupted and the microsomal fraction is isolated by differential centrifugation.
  • the membranes are solubilized in detergent (0.25 % CHAPSO) and incubated with the APP substrate.
  • the Abeta peptides which are produced by ⁇ -secretase cleavage of the substrate are detected by specific ELISA assays as described (Brockhaus M et al, Neuroreport 9(7), 1481-1486 (1998).
  • the preferred compounds show an ICso ⁇ 0.1 ⁇ M (cell-free assay).
  • ICso ⁇ 0.1 ⁇ M cell-free assay
  • the compounds of formula I and the pharmaceutically acceptable salts of the compounds of formula I can be used as medicaments, e.g. in the form of pharmaceutical preparations.
  • the pharmaceutical preparations can be administered orally, e.g. in the form of tablets, coated tablets, dragees, hard and soft gelatine capsules, solutions, emulsions or suspensions.
  • the administration can, however, also be effected rectally, e.g. in the form of suppositories, parenterally, e.g. in the form of injection solutions.
  • the compounds of formula I can be processed with pharmaceutically inert, inorganic or organic carriers for the production of pharmaceutical preparations.
  • Lactose, corn starch or derivatives thereof, talc, stearic acids or its salts and the like can be used, for example, as such carriers for tablets, coated tablets, dragees and hard gelatine capsules.
  • Suitable carriers for soft gelatine capsules are, for example, vegetable oils, waxes, fats, semi-solid and liquid polyols and the like. Depending on the nature of the active substance no carriers are, however, usually required in the case of soft gelatine capsules.
  • Suitable carriers for the production of solutions and syrups are, for example, water, polyols, glycerol, vegetable oil and the like.
  • Suitable carriers for suppositories are, for example, natural or hardened oils, waxes, fats, semi-liquid or liquid polyols and the like.
  • the pharmaceutical preparations can, moreover, contain preservatives, solubilizers, stabilizers, wetting agents, emulsifiers, sweeteners, colorants, flavorants, salts for varying the osmotic pressure, buffers, masking agents or antioxidants. They can also contain still other therapeutically valuable substances.
  • Medicaments containing a compound of formula I or a pharmaceutically acceptable salt thereof and a therapeutically inert carrier are also an object of the present invention, as is a process for their production, which comprises bringing one or more compounds of formula I and/ or pharmaceutically acceptable acid addition salts and, if desired, one or more other therapeutically valuable substances into a galenical administration form together with one or more therapeutically inert carriers.
  • compounds of formula I as well as their pharmaceutically acceptable salts are useful in the control or prevention of illnesses based on the inhibition of the ⁇ -secretase, such as of Alzheimer's disease.
  • the dosage can vary within wide limits and will, of course, have to be adjusted to the individual requirements in each particular case.
  • the dosage for adults can vary from about 0.01 mg to about 1000 mg per day of a compound of general formula I or of the corresponding amount of a pharmaceutically acceptable salt thereof.
  • the daily dosage maybe administered as single dose or in divided doses and, in addition, the upper limit can also be exceeded when this is found to be indicated.
  • Tablet Formulation (Wet Granulation)
  • Item Ingredients mg/tablet 5 mg 25 mg 100 mg 500 mg
  • Item Ingredients mg/capsule 5 mg 25 mg 100 mg 500 mg
  • the reaction mixture was stirred in a sealed flask at 80°C during the weekend.
  • the solvent was evaporated under reduced pressure and the residue was dissolved in a mixture of 30 ml of ethyl acetate and 10 ml of water.
  • the organic layer was separated, dried over sodium sulphate and evaporated under reduced pressure.
  • the crude compound was chromatographed on silica gel using a 3:1- mixture of heptane and ethyl acetate as the eluent.
  • Example 64 (3,3,4,4,4-Pentafluoro-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
  • Racemic (RS)-7-amino-5-(4-methoxy-benzyl)-5H,7H-dibenzo[b,d]azepin-6-one was separated by chromatography on Chiralpak AD with a l:3-mixture of isopopanol and heptane as the eluent to yield:

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Abstract

The present invention relates to compounds of the general formula (I) Wherein R1 is -(CHR’)q-aryl or -(CHR')q-heteroaryl, which are unsubstituted or mono, di- or tri-substituted by lower alkyl, lower alkoxy, CF3 or halogen, or is lower alkyl, lower alkenyl, -(CH2)n-Si(CH3)3, -(CH2)n-O-lower alkyl, -(CH2)n-S-lower alkyl, -(CH2)q-cycloalkyl, -(CH2)n-[CH(OH)]m-(CF2)p-CHqF(3-q), or is -(CH2)n-CR2-CF3, wherein the two R radicals form together with the carbon atom a cycloalkyl ring; R' is hydrogen or lower alkyl; n is 1, 2 or 3; in is 0 or 1; p is 0, 1, 2, 3, 4, 5 or 6; q is 0, 1, 2 or 3; R2 is hydrogen or lower alkyl; R3 is hydrogen, lower alkyl, -CH2CF2CF3, CH2CF3, (CH2)2CF3, CF3, CHF2, CF3, CHF2, CH2F, or is aryl, optionally mono, di or tri-substituted by halogen, or is (CH2)nNR5R6, wherein R5 and R6 are independently from each other hydrogen or lower alkyl; R4 is one of the following groups wherein R7is hydrogen, lower akl, -(CH2)n-CF3 or -(CH2)n-cycloalkyl; R8 is hydrogen, lower alkyl, -C(O)-phenyl, -C(O)-lower alkyl, -C(O)O-(CH2)n- cycloalkyl, -C(O)O-(CH2)n-lower alkyl, -C(O)NH-(CH2)n-lower alkyl or -C(O)NH­(CH2).-CyClOalkYl; R9 is hydrogen, lower alkyl, -(CH2)n-cycloalkyl or -(CH2)n-CF3; and to pharmaceutically suitable acid addition salts, optically pure enantiomers, racernates or diastereomeric mixtures thereof for the treatment of Alzheimer's disease..

Description

SUBSTITUTED DIBENZO-AZEPINE AND BENZO-DIAZEPINE DERIVATIVES USEFUL AS GAMMA-SECRETASE INHIBITORS
The invention relates to compounds of formula
Figure imgf000002_0001
wherein
R1 is -(CHR')q-aryl or -(CHR')q-heteroaryl, which are unsubstituted or mono, di- or tri-substituted by lower alkyl, lower alkoxy, CF3 or halogen, or is lower alkyl, lower alkenyl, -(CH2)n-Si(CH3)3. -(CH2)n-O-lower alkyl, -(CH2)n-S-lower alkyl, -(CH2)q-cycloalkyl, -(CH2)n-[CH(OH)]m-(CF2)p-CHqF(3-q), or is -(CH2)n-CR2-CF3, wherein the two R radicals form together with the carbon atom a cycloalkyl ring;
R' is hydrogen or lower alkyl;
n is 1, 2 or 3; m is 0 or 1; p is 0, 1, 2, 3, 4, 5 or 6; q is 0, 1, 2 or 3;
R2 is hydrogen or lower alkyl;
R3 is hydrogen, lower alkyl, -CH2CF2CF3. CH2CF3. (CH2)2CF3, CF3, CHF2, CH2F, or is aryl, optionally mono, di or tri-substituted by halogen, or is -(CH2)__NR5R6. wherein R5 and R6 are independently from each other hydrogen or lower alkyl; R is one of the following groups
Figure imgf000003_0001
wherein R7 is hydrogen, lower alkyl, -(CH2)n-CF3 or -(CH2)n-cycloalkyl; R8 is hydrogen, lower alkyl, -C(O)-phenyl, -C(O)-lower alkyl, -C(O)O-(CH2)n- cycloalkyl, -C(O)O-(CH2)n-lower alkyl, -C(O)NH-(CH2)n-lower alkyl or -C(O)NH-(CH2)n-cydoalkyl;
R9 is hydrogen, lower alkyl, -(CH2)n-cycloalkyl or -(CH2)n-CF3;
and to pharmaceutically suitable acid addition salts, optically pure enantiomers, racemates or diastereomeric mixtures thereof.
As used herein, the term "lower alkyl" denotes a saturated straight- or branched- chain alkyl group containing from 1 to 10 carbon atoms, for example, methyl, ethyl, propyl, isopropyl, n-butyl, i-butyl, 2-butyl, t-butyl and the like. Preferred lower alkyl groups are groups with 1 - 4 carbon atoms. As used herein, the term "lower alkenyl" denotes a partially saturated straight- or branched-chain carbon group containing at least one double bond with 2 to 10 carbon atoms, for example ethenyl, but-2-enyl or 3,7-dimethyl-octa-2,6-dienyl. The term "cycloalkyl" denotes a saturated carbocyclic group, containing 3 - 7 carbon atoms. The term "lower alkoxy" denotes a group wherein the alkyl residues is as denned above, and which is attached via an oxygen atom. The term "aryl" denotes a monovalent cyclic aromatic hydrocarbon radical consisting of one or more fused rings, in which at least one ring is aromatic in nature, for example phenyl or naphthyl. The term "heteroaryl" denotes a monovalent heterocyclic aromatic radical, for example pyridyl, pyrazinyl, pyrimidinyl, triazinyl, thiazolyl, thiophenyl, furyl, pyrazol, pyrrolyl, imidazolyl or the like.
The term "halogen" denotes chlorine, iodine, fluorine and bromine.
The term "-(CH2)π-[CH(OH)]m-(CF2)p-CHqF(3.q)" denotes a carbon chain, containing at least one halogen atom, for example -CH -CH2-F,
-CH2-CF3) -CH2-CF2-CF3-, -CH2-CH2-CH2-CF3, -CH2-CH2-CF2-CF3. -CH2-CH2-CF3-. -CH2-CF2-CF2-CF3, -CH2-CH(OH)-CF2-CF2- CF2-CF3> or -CH2-(CF2)6-CF3. The term "pharmaceutically acceptable acid addition salts" embraces salts with inorganic and organic acids, such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, citric acid, formic acid, fumaric acid, maleic acid, acetic acid, succinic acid, tartaric acid, methane-sulfonic acid, p-toluenesulfonic acid and the like.
It has been found that the compounds of general formula I are γ-secretase inhibitors and the related compounds maybe useful in the treatment of Alzheimer's disease.
Alzheimer's disease (AD) is the most common cause of dementia in later life. Pathologically AD is characterized by the deposition in the brain of amyloid in extracellular plaques and intracellular neurofibrillary tangles. The amyloid plaques are mainly composed of amyloid peptides (Abeta peptides) which originate from the β- Amyloid Precursor Protein (APP) by a series of proteolytic cleavage steps. Several forms of APP have been identified of which the most abundant are proteins of 695, 751 and 770 amino acids length. They all arise from a single gene through differential splicing. The Abeta peptides are derived from the same domain of the APP but differ at their N- and C-termini, the main species are of 40 and 42 amino-acid length.
Abeta peptides are produced from APP through the sequential action of 2 proteolytic enzymes termed β- and γ-secretase. β-Secretase cleaves first in the extracellular domain of APP just outside of the trans-membrane domain (TM) to produce a C-terminal fragment of APP containing the TM- and cytoplasmatic domain (CTFβ). CTFβ is the substrate for γ-secretase which cleaves at several adjacent positions within the TM to produce the Aβ peptides and the cytoplasmic fragment. The majority of Abeta peptides is of 40 amino acids length (Aβ40), a minor species carries 2 additional amino acids at its C-terminus. Latter is supposed to be the more pathogenic amyloid peptide.
The β-secretase is a typical aspartyl protease. The γ-secretase has a proteolytic activity consisting of several proteins, its exact composition is incompletely understood. However, the presenilins are essential components of this activity and may represent a new group of atypical aspartyl proteases which cleave their substrates within the TM and which are themselves polytopic membrane proteins. Other essential components of γ- secretase are be nicastrin and the products of the aphl and pen-2 genes. Proven substrates for γ-secretase are the APP and the proteins of the Notch receptor family, however, γ-secretase has a loose substrate specificity and may cleave further membrane proteins unrelated to APP and Notch.
The γ-secretase activity is absolutely required for the production of Abeta peptides. This has been shown both by genetic means, i.e., ablation of the presenilin genes and by low-molecular- weight inhibitory compounds. Since according to the amyloid hypothesis the production and deposition of Abeta is the ultimate cause for AD, it is thought that selective and potent inhibitors of γ-secretase will be useful for the prevention and treatment of AD.
Thus, the compounds of this invention will be useful treating AD by blocking the activity of γ-secretase and reducing or preventing the formation of the various amyloidogenic Abeta peptides.
Numerous documents describe the current knowledge on γ-secretase inhibition, for example the following publications:
Nature Reviews/Neuroscience, Vol. 3, April 2002/281, Biochemical Society Transactions (2002), Vol. 30. part 4,
Current Topics in Medicinal Chemistry, 2002, 2, 371-383,
Current Medicinal Chemistry, 2002, Vol. 9, No. 11, 1087-1106,
Drug Development Research, 56, 211-227, 2002,
Drug Discovery Today, Vol. 6, No. 9, May 2001, 459-462, FEBS Letters, 483, (2000), 6-10,
Science, Vol. 297, 353-356, July 2002 and
Journal of Medicinal Chemistry, Vol. 44, No. 13, 2001, 2039-2060. Objects of the present invention are the compounds of formula I per se, the use of compounds of formula I and their pharmaceutically acceptable salts for the manufacture of medicaments for the treatment of diseases, related to the γ-secretase inhibition, their manufacture, medicaments based on a compound in accordance with the invention and their production as well as the use of compounds of formula I in the control or prevention of Alzheimer's disease. A further object of the invention are all forms of optically pure enantiomers, racemates or diastereomeric mixtures for compounds of formula I.
The most preferred compounds of formula I are those, wherein R4 is a). Especially preferred compounds from this group are those, wherein R1 is -CH2-phenyl, unsubstituted or mono, di- or tri-substituted by lower alkyl, lower alkoxy, CF3 or halogen, for example the following compounds:
(2,3-difluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl) -ethyl ester, (2-trifluoromethyl-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester,
(2-methyl-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(2,4-difluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester,
(3,4-difluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)~ethyl-ester,
(2,3,5-trifluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester or (2,3,6-trifluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester. Further preferred are those compounds with R4 is a), wherein R1 is
-(CH2)π-[CH(OH)]m-(CF2)p-CHqF(3_q), for example the following compounds:
(2,2,2-trifluoro-ethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepm-7-ylcarbamoyl)-ethyl ester,
(2,2,3,3,3-pentafluoro-propyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(2,2,3,3,3-pentafluoro-propyl)-carbamic acid 2-fluoro-l-(5-methyl-6-oxo-6)7-dihydro-
5H-dibenzo [b,d] azepin-7-ylcarbamoyl) -ethyl ester, (2,2,3,3,3-pentafluoro-propyl)-carbamic acid l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl) -propyl ester,
(2,2,2-trifluoro-ethyl)-carbamic acid l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-propyl ester,
(2,2,2-trifluoro-ethyl)-carbamic acid 2-fluoro- l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester,
(2,2,3,3,3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-
5H-dibenzo [b,d] azepin-7-ykarbamoyl) -ethyl ester,
(3,3,3-trifluoro-propyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester, (3,3,4,4,4-pentafluoro-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(2,2,3,3,4,4,4-heptafluoro-bu1yl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-
5H-dibenzo [b,d] azepin-7-ylcarbamoyl) -ethyl ester,
(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluoro-octyl)-carbamic acid (S)-l-((S)-5-methyl- 6-oxo-6,7-dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester, (2,2,2-trifluoro-et yl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester,
(2,2,3,3.3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester, (3,3,3-trifluoro-propyl)-carbamic acid (S)~l-((S)-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester,
(2,2,3,3)3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-cyclopropylmethyl-6-oxo-6,7- dihydro-5H-dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester or (2,2,3,3,3-pentafluoro-propyl)-carbamic acid (S)-l-[(S)-6-oxo-5-(2.2,2-trifluoro-ethyI)- 6,7-dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl] -ethyl ester. Preferred are further compounds of formula I, wherein R4 is a) and R is
-(CH2)__-cycloalkyl, for example the following compound: cyclopropylmethyl-carbamic acid 3-methyl-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-butyl ester. Further preferred are compounds of formula I, wherein R4 is a) and R1 is
-(CH2)n-CR2-CF3, wherein the two R radicals form together with the carbon atom a cycloalkyl ring, for example the following compound:
(l-trifluoromethyl-cyclopropylmethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester. Further preferred are those compounds with R is a), wherein R1 is lower alkyl, for example the following compound: (3,3-dimethyl-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester.
Preferred are also compounds of formula I, wherein R4 is b). Compounds of such groups are for example (2,2.3.3,3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-benzoyl-l-methyl-2~oxo- 2,3,4,5-tetrahydro- lH-benzo [b] [ 1,4] diazepin-3-ylcarbamoyl)-ethyl ester (2,2,3,3,3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-acetyl-l-methyl-2-oxo- 2,3,4,5-tetrahydro-lH-benzo[b] [1.4]diazepin-3-ylcarbamoyl)-ethyl ester (S)-5-methyl-4-oxo-3-[(S)-2-(2,2,3,3,3-pentafluoro-propylcarbamoyloxy)- propionylamino]-2,3,4,5-tetrahydro-benzo[b] [1, 4] diazepine-1 -carboxylic acid cyclopropylmethyl ester or
(2,2,3,3,3-pentafluoro-propyl)-carbamic aάd (S)-l-[(S)-5-(cyclopropylmethyl- carbamoyl)-2-oxo-l-(2,2,2-trifluoro-ethyl)-2,3,4)5-tetrahydro-lH- benzo[b] [l,4]diazepin-3-ylcarbamoyl]-ethyl ester.
One embodiment of the present invention are further those compounds of formula I-l,
Figure imgf000008_0001
wherein
R1 is -(CH2)n-aryl or -(CH2)n-heteroaryl, which are unsubstituted or mono, di- or tri- substituted by lower alkyl, lower alkoxy, CF3 or halogen, or is lower alkyl, -(CH2)n-O-lower alkyl, -(CH2)n-S-lower alkyl, -(CH2)n-cycloalkyl, -(CH2)n-CH2F, -(CH2)n-CF3, -(CH2)n-CF2-CF3. -(CH2)n-CF2-CHF25 -(CH2)__-CR2-CF3, and wherein the two R radicals form together with the carbon atom a cycloalkyl ring;
R2 is hydrogen or lower alkyl;
R3 is hydrogen, lower alkyl, -CH2F, CHF2, CF3, aryl, optionally mono, di or tri- substituted by halogen, or is -(CH2)nNR5R6. wherein R5 and R6 are independently from each other hydrogen or lower alkyl; R is one of the following groups
Figure imgf000009_0001
wherein R7 is lower alkyl or -(CH)2-cycloalkyl; R8, R9 are independently from each other hydrogen, lower alkyl, -(CH2)n-cycloalkyl or -C(O) -phenyl;
and pharmaceutically suitable acid addition salts, optically pure enantiomers, racemates or diastereomeric mixtures thereof. The present compounds of formula I and their pharmaceutically acceptable salts can be prepared by methods known in the art, for example, by processes described below, which processes comprise a) reacting a compound of formula
with a compound of formula R CO HI
to a compound of formula
Figure imgf000009_0003
wherein R1 - R have the meaning as described above, or b) reacting a compound of formula
Figure imgf000010_0001
with a compound of formula
NHR!R2 II
in the presence of a suitable phosgene equivalent such as 4-nitrophenyl chloroformate and a base, such as triethylamine,
to a compound of formula
Figure imgf000010_0002
wherein R1 - R have the meaning as described above, and if desired, converting the compounds obtained into pharmaceutically acceptable acid addition salts.
The detailed description can be found below and in Examples 1 - 83. The starting materials of formula V and VI are known compounds or may be prepared by methods well-known in the art.
Scheme 1
Figure imgf000011_0001
or optionally
Figure imgf000011_0002
In this scheme R1 to R4 are as described above. In accordance with scheme 1 a compound of formula I ma be prepared as follows:
An hydroxy-acid of formula V is suitably activated, for instance with a coupling agent such as EDC (l-(3-dimethylaminopropyl)-3-ethylcarbodiimide), and converted with an amine of formula VI to an intermediate hydroxy compound of formula IV. This can be transformed into a compound of formula la by reaction with an isocyanate of formula III. Optionally, a compound of formula IV can be transformed into a compound of formula I by reaction with a suitable phosgene equivalent and a base, such as 4- nitrophenyl chloroformate and triethylamine, and an amine of formula II.
Several compounds of formula I ma be converted to a corresponding acid addition salt.
The conversion is accomplished by treatment with at least a stoichiometric amount of an appropriate acid, such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid and the like, and organic acids suchas acetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, malic acid, malonic acid, succinic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, p-toluenesulfonic acid, salicylic acid and the like. Typically, the free base is dissolved in an inert organic solvent such as diethyl ether, ethyl acetate, chloroform, ethanol or methanol and the like, and the acid added in a similar solvent. The temperature is maintained between 0 °C and 50 °C. The resulting salt precipitates spontaneously or maybe brought out of solution with a less polar solvent.
The acid addition salts of compounds of formula I maybe converted to the corresponding free bases by treatment with at least a stoichiometric equivalent of a suitable base such as sodium or potassium hydroxide, potassium carbonate, sodium bicarbonate, ammonia, and the like.
The compounds of formula I and their pharmaceutically usable addition salts possess valuable pharmacological properties. Specifically, it has been found that the compounds of the present invention may inhibit the γ-secretase. The compounds were investigated in accordance with the test given hereinafter.
Description of γ-secretase assay
The activity of test compounds can be evaluated in assays which measure the proteolytic cleavage of suitable substrates by γ-secretase activity. These can be cellular assays where e.g., a substrate of the γ-secretase is fused in its cytoplasmic domain to a transcription factor. Cells are transfected with this fusion gene and a reporter gene, e.g., firefly luciferase, which expression is enhanced by the transcription factor. Cleavage of the fused substrate by γ-secretase will lead to expression of the reporter gene which can be monitored in appropriate assays. The γ-secretase activity can also be determined in a cellular assay where e.g. HEK293 cells are transfected with a vector which expresses the cDNA for the human APP and which secrete Abeta peptides into the culture medium. The amount of secreted peptides can be determined with specific ELISA assays. Cell lines of neuronal origin secrete Abeta peptides from their endogenous APP gene which can be measured with the specific ELISA assay. Treatment with compounds which inhibit γ- secretase leads to a reduction of secreted Abeta thus providing a measure of inhibition. A cell-free assay of γ-secretase activity uses a HEK293 membrane fraction as a source of γ-secretase and a recombinant APP substrate. Latter consist of the C-terminal 100 amino acids of human APP fused to a 6x Histidin tail for purification which is expressed in E.coli in a regulatable expression vector, e.g. pEtl5. This recombinant protein corresponds to the truncated APP fragment which results after γ-secretase cleavage of the extracellular domain and which constitutes the γ-secretase substrate. The assay principle is described in Li YM et al, PNAS 97(11), 6138-6143 (2000). Hek293 cells are mechanically disrupted and the microsomal fraction is isolated by differential centrifugation. The membranes are solubilized in detergent (0.25 % CHAPSO) and incubated with the APP substrate. The Abeta peptides which are produced by γ-secretase cleavage of the substrate are detected by specific ELISA assays as described (Brockhaus M et al, Neuroreport 9(7), 1481-1486 (1998).
The preferred compounds show an ICso< 0.1 μM (cell-free assay). In the list below are described some data to the γ-secretase inhibition:
Figure imgf000013_0001
The compounds of formula I and the pharmaceutically acceptable salts of the compounds of formula I can be used as medicaments, e.g. in the form of pharmaceutical preparations. The pharmaceutical preparations can be administered orally, e.g. in the form of tablets, coated tablets, dragees, hard and soft gelatine capsules, solutions, emulsions or suspensions. The administration can, however, also be effected rectally, e.g. in the form of suppositories, parenterally, e.g. in the form of injection solutions.
The compounds of formula I can be processed with pharmaceutically inert, inorganic or organic carriers for the production of pharmaceutical preparations. Lactose, corn starch or derivatives thereof, talc, stearic acids or its salts and the like can be used, for example, as such carriers for tablets, coated tablets, dragees and hard gelatine capsules. Suitable carriers for soft gelatine capsules are, for example, vegetable oils, waxes, fats, semi-solid and liquid polyols and the like. Depending on the nature of the active substance no carriers are, however, usually required in the case of soft gelatine capsules. Suitable carriers for the production of solutions and syrups are, for example, water, polyols, glycerol, vegetable oil and the like. Suitable carriers for suppositories are, for example, natural or hardened oils, waxes, fats, semi-liquid or liquid polyols and the like.
The pharmaceutical preparations can, moreover, contain preservatives, solubilizers, stabilizers, wetting agents, emulsifiers, sweeteners, colorants, flavorants, salts for varying the osmotic pressure, buffers, masking agents or antioxidants. They can also contain still other therapeutically valuable substances.
Medicaments containing a compound of formula I or a pharmaceutically acceptable salt thereof and a therapeutically inert carrier are also an object of the present invention, as is a process for their production, which comprises bringing one or more compounds of formula I and/ or pharmaceutically acceptable acid addition salts and, if desired, one or more other therapeutically valuable substances into a galenical administration form together with one or more therapeutically inert carriers.
In accordance with the invention compounds of formula I as well as their pharmaceutically acceptable salts are useful in the control or prevention of illnesses based on the inhibition of the γ-secretase, such as of Alzheimer's disease.
The dosage can vary within wide limits and will, of course, have to be adjusted to the individual requirements in each particular case. In the case of oral administration the dosage for adults can vary from about 0.01 mg to about 1000 mg per day of a compound of general formula I or of the corresponding amount of a pharmaceutically acceptable salt thereof. The daily dosage maybe administered as single dose or in divided doses and, in addition, the upper limit can also be exceeded when this is found to be indicated. Tablet Formulation (Wet Granulation)
Item Ingredients mg/tablet 5 mg 25 mg 100 mg 500 mg
1. Compound of formula I 5 25 100 500 2. Lactose Anhydrous DTG 125 105 30 150
3. Sta-Rx 1500 6 6 6 30
4. Microcrystalline Cellulose 30 30 30 150
5. Magnesium Stearate 1 1 1 1 Total 167 167 167 831
Manufacturing Procedure
1. Mix items 1, 2, 3 and 4 and granulate with purified water.
2. Dry the granules at 50 °C.
3. Pass the granules through suitable milling equipment.
4. Add item 5 and mix for three minutes; compress on a suitable press. Capsule Formulation
Item Ingredients mg/capsule 5 mg 25 mg 100 mg 500 mg
1. Compound of formula I 5 25 100 500
2. Hydrous Lactose 159 123 148 —
3. Corn Starch 25 35 40 70
4. Talc 10 15 10 25
5. Magnesium Stearate 1 2 2 5 Total 200 200 300 600
Manufacturing Procedure
1. Mix items 1, 2 and 3 in a suitable mixer for 30 minutes.
2. Add items 4 and 5 and mix for 3 minutes.
3. Fill into a suitable capsule. Example 1
Benzyl-carbarnic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- ylcarbamoyl)-ethyl ester
Figure imgf000016_0001
a) (S -2-Hydroxy-N-(5-methyl-6-oxo-6J-dihydro-5H-dibenzorb,d1azepin-7-yl)- propionamide
Hydroxybenzotriazole (344mg, 2.55mmol), diisopropylethylamine (659mg, 5.1mmol) and l-(3~dimethylammopropyl)-3-ethylcarbod_imide hydrochloride (488 mg, 2.55 mmol) were added to a cooled (0 °C) solution of 7-amino-5-methyl-5H,7H- dibenzo[b,d]azepin-6-one hydrochloride (700 mg, 2.55 mmol) andL-(+)-lactic acid (252 mg, 2.8 mmol) in THF (7ml) and stirred overnight at r.t. The solvent was evaporated, the residue was taken up in dichloromethane and washed with water. The organic phase was dried over Na2SO4 and evaporated. Upon chromatographic purification (silica gel, dichloromethane / methanol = 1:0 - 9:1) the title compound (820mg, quant.) was obtained as a white solid.
b) Benzyl-carbamic acid (S)-l-(5-methyl-6-oxo-6.7-dihydro-5H-dibenzo[b,d]azepin-7- ylcarbamoyl) -ethyl ester Benzylisocyanate (13.3 mg, 0.1 mmol) was added to a solution of (S)-2-hydroxy~Ν-(5~ methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide (30 mg, 0.1 mmol) in Toluol (1 ml) and heated to 100 °C for 1 week. The solvent was evaporated and the residue was dissolved in DMF (0.5 ml). The title compound, MS: m/e = 444.4 (M+H+) (29 mg, 67 %), was isolated from this mixture by automated, preparative HPLC (YMC CombiPrep C18 column 50x20mm, solvent gradient 5-95 % CH3CN in 0.1 % TFA(aq) over 6.0 min, λ = 230 nm, flow rate 30 ml/ min).
Example 2
o-Tolyl-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- ylcarbamoyl)-ethyl ester
Figure imgf000017_0001
The title compound, MS: m/e = 444.4 (M+H+), was prepared in analogy to example 1 from o-tolyl isocyanate. Example 3
(4-Fluoro-phenyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000017_0002
The title compound, MS: m/e = 448.3 (M+H+), was prepared in analogy to example 1 from 4-fluorophenyl isocyanate. Example 4
(3-Fluoro-phenyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dϊbenzo [b,d] azepin-7-ylcarbamoyl) -ethyl ester
Figure imgf000017_0003
The title compound, MS: m/e = 448.3 (M+H+), was prepared in analogy to example 1 from 3 -fluorophenyl isocyanate. Example 5
Thiophen-2-yl-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000017_0004
The title compound, MS: m/e = 436.3 (M+H+), was prepared in analogy to example 1 from 2-thienyl isocyanate. Example 6
Etnyl-carbarmc acid (S)-l-(5-met yl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- ylcarbamoyl)-ethyl ester
Figure imgf000018_0001
A solution of (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- yl)-propionamide (30 mg, 0.09 mmol), 4-nitrophenyl chloroformate (19 mg, 0.09 mmol), and triethylamine (20 microliter) in toluol (1 ml) were shaken overnight at r.t. Ethylamine hydrochloride (7.9 mg, 0.1 mmol) was added and the mixture was shaken again overnight at r.t.. The solvent was evaporated and the residue was dissolved in DMF (0.5 ml). The title compound, MS: m/e = 382.3 (M+H+), (11 mg, 30 %) was isolated from this mixture by automated, preparative HPLC (YMC CombiPrep C18 column
50x20mm, solvent gradient 5-95 % CH3CN in 0.1 % TFA(aq) over 6.0min, λ = 230 nm, flow rate 30 ml/min). Example 7
(2-Methoxy-ethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000018_0002
The title compound, MS: m/e = 412.3 (M+H+), was prepared in analogy to example 6 from 2-methoxyethylamine. Example 8
Propyl-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- ylcarbamoyl)-ethyl ester
Figure imgf000018_0003
The title compound, MS: m/e = 396.4 (M+H+), was prepared in analogy to example 6 from propylamine. Example 9
Cyclopropylmethyl-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000019_0001
The title compound, MS: m/e = 408.4 (M+H+), was prepared in analogy to example 6 from aminomethylcyclopropane. Example 10
(2-Methylsulfanyl-ethyl)-carbainic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000019_0002
The title compound, MS: m/e = 428.5 (M+H+), was prepared in analogy to example 6 from 2-(methylthio)ethylamine. Example 11
(3-Methoxy-propyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000019_0003
The title compound, MS: m/e = 426.4 (M+H ), was prepared in analogy to example 6 from 3-methoxypropylamine. Example 12
Cyclopropyl-carbamic acid (S)- 1- (5-methyl-6-oxo-6,7-dihydro-5H-dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000020_0001
The title compound, MS: m/e = 394.3 (M+H+), was prepared in analogy to example 6 from cyclopropylamine. Exampe 13
Isopropyl-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- ylcarbamoyl)-ethyl ester
Figure imgf000020_0002
The title compound, MS: m/e = 396.4 (M+H+), was prepared in analogy to example 6 from isopropylamine. Example 14
(2-Fluoro-ethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000020_0003
The title compound, MS: m/e = 400.5 (M+H+), was prepared in analogy to example 6 from 2-fluoroethylamine hydrochloride. Example 15
(4-Fluoro-benzyl)-carbamic acid (S)-l-(5-me yl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000020_0004
The title compound, MS: m/e = 462.3 (M+H+), was prepared in analogy to example 6 from 4-fluorobenzylamine. Example 16
(2-Fluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000021_0001
The tide compound, MS: m/e = 462.3 (M+H+), was prepared in analogy to example 6 from 2-fluorobenzylamine. Example 17
(2,5-Difluoro-benzyI)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000021_0002
The tide compound, MS: m/e = 479.17 (M+H+), was prepared in analogy to example 6 from 2,5-difluorobenzylamine. Example 18
(2,3-Difluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000021_0003
The tide compound, MS: m/e = 480.4 (M+H+), was prepared in analogy to example 6 from 2,3-difluorobenzylamine. Example 19
[2-(3-Fluoro-phenyl)-ethyl]-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro--5H- dibenzo[b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000022_0001
The tide compound, MS: m/e = 476.3 (M+H+), was prepared in analogy to example 6 from 3-fluorophenethylamine. Example 20
(2,2,2-Trifluoro-ethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000022_0002
The tide compound, MS: m/e = 436.4 (M+H+), was prepared in analogy to example 6 from 2,2,2-tiifluoroethylamine. Example 21
(3,5-Difluoro-benzyl)-carbamic acid (S)- l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000022_0003
The tide compound, MS: m/e = 480.4 (M+H+), was prepared in analogy to example 6 from 3,5-difluorobenzylamine. Example 22
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000022_0004
The tide compound, MS: m/e = 486.4 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3 -pentafluoropropylamine. Example 23
(2-Trifluoromethyl-benzyl)-carbamic acid (S)-l-(5-me yl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000023_0001
The tide compound, MS: m/e = 512.3 (M+H+), was prepared in analogy to example 6 from 2- (trifluoromethyl)benzylamine.
Example 24
(2-Chloro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000023_0002
The tide compound, MS: m/e = 478.1 (M+H+), was prepared in analogy to example 6 from 2-chlorobenzylamine.
Example 25
(2-Methyl-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000023_0003
The tide compound, MS: m/e = 458.3 (M+H+), was prepared in analogy to example 6 from 2-methylbenzylamine. Example 26
(2-Methoxy-benzyl)-carbaxπic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b.d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000024_0001
The tide compound, MS: m/e = 474.2 (M+H+), was prepared in analogy to example 6 from 2-methoxybenzylamine. Example 27
(2,4-Difluoro-benzyl)-carbamic acid (S)-l-(5-memyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000024_0002
The tide compound, MS: m/e = 480.2 (M+H+), was prepared in analogy to example 6 from 2,4-difluorobenzylamine. Example 28
(3,4-Difluoro-benzyl)-carbarnic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000024_0003
The title compound, MS: m/e = 480.2 (M+H+), was prepared in analogy to example 6 from 3,4-difluorobenzylamine. Example 29
(2,3,5-Trifluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000024_0004
The tide compound, MS: m/e = 498.2 (M+H+), was prepared in analogy to example 6 from 2,3,5-frifluorobenzylamine. Example 30
(2,3,6-Trifluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000025_0001
The tide compound, MS: m/e = 498.2 (M+H+), was prepared in analogy to example 6 from 2,3,6-trifluorobenzylamine. Example 31
(2-Fluoro-5-trifluoromethyl-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000025_0002
The tide compound, MS: m/e = 530.1 (M+H+), was prepared in analogy to example 6 from 2-fluoro-5-(trifluoromethyl)benzylamine.
Example 32
(2,6-Difluoro-benzyl)-carbamic acid (S)-l-(5-me yl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000025_0003
The tide compound, MS: m/e = 480.2 (M+H+), was prepared in analogy to example 6 from 2,6-difluorobenzylamine. Example 33
((R)-l-Phenyl-ethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000026_0001
The tide compound, MS: m/e = 458.3 (M+H+), was prepared in analogy to example 6 from (R)-l-phenylethylamine. Example 34
((S)-l-Phenyl-ethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000026_0002
The tide compound, MS: m/e = 458.3 (M+H+), was prepared in analogy to example 6 from (S)-l-phenylethylamine. Example 35
Benzyl-methyl-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000026_0003
The tide compound, MS: m/e = 458.2 (M+H+), was prepared in analogy to example 6 from N-methylbenzylamine. Example 36
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (R)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000026_0004
The tide compound, MS: m/e = 486.2 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3 -pentafluoropropylamine and (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7- dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide. The latter can be obtained in analogy to (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- yl)-propionamide (example 1, step a) from D-(-)-Lactic acid. Example 37
(2,2)3,3,3-Pentafluoro-propyl)-carbamic acid 3-methyl-(S)-l-(5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-butyl ester
Figure imgf000027_0001
The tide compound, MS: m/e = 518.5 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3-pentafluoropropylamine and (S)-2-hydroxy-4-methyl-pentanoic acid (5- methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-amide. The latter can be obtained in analogy to (S)-2-hydroxy-N-(5-methyl-6-oxo~6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from (S)-2-hydroxy-4- methyl-pentanoic acid. Example 38
Benzyl-carbamic acid 3-methyl-(S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-butyl ester
Figure imgf000027_0002
The title compound, MS: m/e = 484.4 (M+H+), was prepared in analogy to example 37 from benzylamine. Example 39
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid 2-fluoro-l-(5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000028_0001
The tide compound, MS: m/e = 504.1 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3-pentafluoropropylamine and 3-fluoro-2-hydroxy-N-(5-methyl~6-oxo-6,7- dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide. The latter can be obtained in analogy to (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo [b,d] azepin-7- yl)-propionamide (example 1, step a) from 3-fluoro lactic acid.
Example 40
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-propyl ester
Figure imgf000028_0002
The tide compound, MS: m/e = 500.2 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3-pentafluoropropylamine and 2-hydroxy-N-(5-methyl-6-oxo-6,7~dihydro~ 5H-dibenzo[b,d]azepin-7-yl)-butyramide. The latter can be obtained in analogy to (S)-2- hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from 2-hydroxy-butyric acid.
Example 41
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid 2-dimetibylamino-l-(5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000028_0003
The tide compound, MS: m/e = 529.2 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3-pentafluoropropylamine and 3-dimethylamino-2-hydroxy-N-(5-methyl- 6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide. The latter can be obtained in analogy to (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from 3-dimethylamino-2- hydroxy-propionic acid. Example 42
Cyclopropyhnethyl-carbamic acid (5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl) -methyl ester
Figure imgf000029_0001
The tide compound, MS: m/e = 394.1 (M+H+), was prepared in analogy to example 6 from cyclopropylmethylamine and 2-hydroxy-Ν-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl)-acetamide. The latter can be obtained in analogy to (S)-2- Hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from hydroxy-acetic acid.
Example 43
Cyclopropyhnethyl-carbamic acid 3-methyl- 1- (5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -butyl ester
Figure imgf000029_0002
The tide compound, MS: m/e = 450.3 (M+H+), was prepared in analogy to example 6 from cyclopropylmethylamine and 2-hydroxy-4-methyl-ρentanoic acid (5-methyl-6- oxo-6,7-dihydro~5H-dibenzo[b,d]azepin-7-yl)-amide. The latter can be obtained in analogy to (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- yl)-propionamide (example 1, step a) from 2-hydroxy-4-methyl-pentanoic acid.
Example 44
Cyclopropylmethyl-carbamic acid (3,5-difluoro-phenyl)-(5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo[b,d]azepin-7-ylcarbamoyl)-methyl ester
Figure imgf000030_0001
The tide compound, MS: m e = 506.2 (M+H+), was prepared in analogy to example 6 from cyclopropylmethylamine and 2-(3,5-difluoro-phenyl)-2-hydroxy-N-(5-methyl-6- oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-acetamide. The latter can be obtained in analogy to (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo [b,d] azepin-7- yl)-propionamide (example 1, step a) from (3,5-difluoro-phenyl)-hydroxy-acetic acid.
Example 45
(l-Trifluoromethyl-cyclopropyhnethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000030_0002
The tide compound, MS: m/e = 476.4 (M+H+), was prepared in analogy to example 6 from 1 -trifluoromethyl-cyclopropylmethylamine.
Example 46
(4,4,4-Trifluoro-butyI)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000030_0003
The tide compound, MS: m/e = 464.5 (M+H+), was prepared in analogy to example 6 from 4,4,4-trifluoro-butylamine. Example 47
(3,3,4,4-Te1xafluoro-butyl)-carbarnic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000031_0001
The title compound, MS: m/e = 482.5 (M+H+), was prepared in analogy to example 6 from 3,3,4,4-tetrafluoro-butylamine. Example 48
(3,3,4,4-Tetrafluoro-butyl)-carbamic acid l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyI)-propyl ester
Figure imgf000031_0002
The tide compound, MS: m/e = 496.5 (M+H+), was prepared in analogy to example 6 from 3,3,4,4-tetrafluoro-butylamine and 2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin-7-yl)-butyramide. The latter can be obtained in analogy to (S)-2- hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from hydroxybutyric acid.
Example 49
(2,2,2-Trifluoro-ethyl)-carbamic acid 1- (5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-propyl ester
Figure imgf000032_0001
The tide compound, MS: m/e = 450.6 (M+H+), was prepared in analogy to example 6 from 2,2,2-trifluoro-ethylamine and 2-Hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl)-butyramide. The latter can be obtained in analogy to (S)-2- hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from hydroxybutyric acid.
Example 50
(3,3,4,4- Tetrafluoro-butyl)-carbamic acid 2-fluoro-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000032_0002
The tide compound, MS: m/e = 500.5 (M+H+), was prepared in analogy to example 6 from 3,3,4,4-tetrafluoro-butylamine and 3-fluoro-2-hydroxy-N-(5-methyl~6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-yl) -propionamide. The latter can be obtained in analogy to (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo [b,d] azepin-7- yl) -propionamide (example 1, step a) from 3-fluoro-lactic acid.
Example 51
(2,2,2-Trifluoro-ethyl)-carbamic acid 2-fluoro-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000033_0001
The tide compound, MS: m/e = 454.5 (M+H+), was prepared in analogy to example 6 from 2,2,2 -trifluoro-ethyl and 3-fluoro-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl)-propionamide. The latter can be obtained in analogy to (S)-2- hydroxy-Ν-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from 3-fluoro-lactic acid.
Example 52
(l-Trifluoromethyl-cyclopropylmethyl)-carbamic acid 2-fluoro-l-(5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000033_0002
The tide compound, MS: m/e = 494.5 (M+H+), was prepared in analogy to example 6 from 1-trifluoromethyl-cyclopropylmethylamine and 3-fluoro-2-hydroxy-N-(5-methyl- 6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide. The latter can be obtained in analogy to (S)~2-hydroxy-Ν-(5-methyl-6-oxo-6,7~dihydro-5H- dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from 3-fluoro-lactic acid.
Example 53
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-((S)-l-cyclopropy_jnethyl-5-methyl- 2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-ylcarbamoyl)-ethyl ester
Figure imgf000033_0003
a) ((S -l-Cvclopropylmethyl-2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4ldiazepin-3-yl - carbamic acid tert-butyl ester
To a solution of 0.6 g (2.2 mmol) (S)-(2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [1,4] diazepin-3-yl)-carbamic acid tert-butyl ester in 10 ml of tetrahydrofuran at -75 °C 2.2 ml (2.2 mmol) of lithium bis(trimethylsilyl)amide solution (1M in tetrahydrofurane) was added. After stirring for 30 min at -75 °C the mixture was allowed to reach room temperature and 0.35 g (2.6 mmol) of bromomethyl-cyclopropane was added. The mixture was stirred for 2.5 hours at room temperature and concentrated in vacuo. The residue was distributed between 1M NaHSO solution and ethyl acetate. The combined organic layers were re-extracted with water and dried (MgSO ) to yield 0.285 g (40 %) of ((S)-l-cyclopropylmethyl-2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-yl)- carbamic acid tert-butyl ester.
b) (S -3-Amino-l-cyclopropyl-5-methyl-l,3 4,5-tetrahydro-benzo b1 [l, ^diazepin-2- one
To 0.35 g (1 mmol) of ((S)-l-cyclopropylmethyl-2-oxo-2,3,4,5-tetrahydro-lH- benzofb] [l,4]diazepin-3-yl)-carbamic acid tert-butyl ester in dimethylformamide (3.5 ml) 0.36 g (3.0 mmol) of potassium carbonate and 0.37 g (3 mmol) of methyl iodide were added and the mixture was stirred at room temperature overnight. Water (10 ml) was added and the mixture was extracted two times with ethyl acetate (10 ml each). The combined organic layers were dried (MgSO ) and purified by column chromatography (hexane / ethyl acetate = 1:1) to yield 0.33 g (72 %) of a white solid. This compound was dissolved in a mixture of 2 ml of dichlorometane and 2 ml of trifluoracetic acid and stirred for 2.5 h at room temperature. For workup the mixture was concentrated in vacuo, then dichloromethane was added and the mixture was extracted with sodium bicarbonate solution. The organic phase was dried (MgSO ) and evaporated to yield 0.22 g of (S)-3-amino-l-cyclopropyl-5-methyl-l,3,4,5-tetrahydro-benzo[b] [l,4]diazepin-2- one.
c) (S -N-("(S -l-Cyclopropylmethyl-5-methyl-2-oxo-2,3,4,5-tetrahydro-lH- benzo [bl [1,41 diazepin-3-yl)-2-hydroxy-propionamide
Hydroxybenzotriazole (121 mg, 1 mmol), diisopropylethylamine (23 2mg, 2 mmol) and l-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (172 mg, 1 mmol) were added to a cooled (0 °C) solution of (S)-3-amino-l-cyclopropyl-5-methyl-l,3,4,5- tetrahydro-benzo[b] [l,4]diazepin-2-one (220 mg, 1 mmol) and L-(+)-lactic acid (81 mg, Immol) in THF (2 ml) and stirred overnight at r.t. The solvent was evaporated, the residue was taken up in dichloromethane and washed with water. The organic phase was dried over Na2SO and evaporated. Upon chromatographic purification (silica gel, dichloromethane / methanol = 1:0 - 9:1) the tide compound (347 mg, quant.) was obtained as a white solid.
d) (2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-((S)-l-cyclopropylmethyl-5- methyl-2-oxo-2.3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-ylcarbamoyl)-ethyl ester The tide compound, MS: m/e = 493.3 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3-pentafluoropropylamine and (S)-N-((S)-l-cyclopropylmethyl-5-methyl- 2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-yl)-2-hydroxy-propionamide.
Example 54
(2,2,2-Trifluoro-ethyl)-carbamic acid (S)-l-((S)-l-cyclopropylmethyl-5-methyl-2-oxo- 2,3,4,5-tetrahydro-lH-benzo[b][l,4]diazepin-3-ylcarbamoyI)-ethyl ester
Figure imgf000035_0001
The tide compound, MS: m/e = 483.3 (M+H+), was prepared in analogy to example 56 from 2,2,2-trifluoro-ethylamine. Example 55
(l-Trifluoromethyl-cyclopropylmethyl)-carbamic acid (S)-l-((S)-l-cyclopropylmethyl- 5-methyl-2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-ylcarbamoyl)-ethyl ester
Figure imgf000035_0002
The tide compound, MS: m/e = 443.1 (M+H+), was prepared in analogy to example 56 from l-trifluoromethyl-cyclopropylmethylamme.
Example 56
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-benzoyl-l-methyl-2-oxo- 2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-ylcarbamoyl)-ethyl ester
Figure imgf000036_0001
a) (S)-(-l-Methyl-2-oxo-2,3,4,5-tetrahydro-lH-benzo[bl [l,4]diazepin-3-yl -carbamic acid tert-butyl ester
To a solution of 5.0 g (18 mmol) (S)-(2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4] diazepin-3-yl)-carbamic acid tert-butyl ester in 80 ml of tetrahydrofuran at -75 °C 18 ml (18 mmol) of lithium bis (trimethylsilyl) amide solution (IM in tetrahydrofurane) was added. After stirring for 30 min at -75 °C the mixture was allowed to reach room temperature and 3.07 g (21.6 mmol) of methyl iodide was added. The mixture was stirred for 2.5 hours at room temperature and concentrated in vacuo. The residue was distributed between IM NaHSO4 solution and ethyl acetate. The combined organic layers were reextracted with water and dried (MgSO ). After evaporation of the solvent, (S)-(l- methyl-2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-yl)-carbamic acid tert- butyl ester was obtained in sufficient purity for the next step.
b) (S -(5-Benzoyl-l-methyl-2-oxo-2,3.4,5-tetrahydro-lH-benzo[b] [ 4ldiazepin-3-yl)- carbamic acid tert-butyl ester
(S)-(l-Methyl-2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-yl)-carbamic acid tert-butyl ester (260 mg, 0.55 mmol), triethylamine (111 mg, 1.1 mmol), and benzoyl chloride (93 mg, 0.66 mmol) were dissolved in dichloromethane (2 ml) and stirred overnight. The reaction mixture was then poured on HCl (IN), and extracted with dichloromethane. The organic layer was washed with NaHCO3 (IN), dried, and evaporated. (S)-(5-Benzoyl-l-methyl-2-oxo-2,3,4,5-tetrahydro-lH- benzo[b] [l,4]diazepin-3-yl)-carbamic acid tert-butyl ester was obtained in sufficient purity for the next step.
c (S)-3-Amino-5-benzoyl-l-methyl-l,3,4,5-tetrahydro-benzo[b] [l,4]diazepin-2-one (S)-(5-Benzoyl-l-methyl-2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-yl)- carbamic acid tert-butyl ester (260 mg, 0.66 mmol) was dissolved in a mixture of trifluoroacetic acid and dichloromethane (1:1, 2ml) for 2.5 h. Upon evaporation of the volatile parts, (S)-3-amino-5-benzoyl-l-methyl-l,3,4,5-tetrahydro- benzo[b] [l,4]diazepin-2-one was obtained in sufficient purity for the next step. d) (2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-f (S)-5-benzoyl-l-methyl-2-oxo- 23-4,5-tetrahydro- IH-benzo [b] [1,4] diazepin-3-ylcarbamoyl)-efhyl ester The tide compound, MS: m/e = 543.2 (M+H+), was prepared in analogy to example 53 from 2,2,3,3,3-pentafluoropropylamine and N-((S)-5-benzoyl-l-methyl-2-oxo-2,3,4,5- tetrahydro-lH-benzo[b] [l,4]diazepin-3-yl)-(S)-2-hydroxy-propionamide. The latter can be prepared in analogy to (S)-2-hydroxy-Ν-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl)-propionamide (example 1, step a) from (S)-3-amino-5- benzoyl-l-methyl-l,3,4,5-tetrahydro-benzo[b] [l,4]diazepin-2-one. Example 57
Figure imgf000037_0001
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-acetyl-l-methyl-2-oxo- 2,3,4,5-tetrahydro- IH-benzo [b] [ 1 ,4]diazepin-3-ylcarbamoyl)-ethyl ester
a) ((S)-5-Acetyl- l-methyl-2-oxo-2,3,4,5-tetrahydro- IH-benzo [b] [1,4] diazepin-3-yl)- carbamic acid tert-butyl ester
In an analogous manner to that described in Example 56 b), the acylation of (S)-(l- methyl-2-oxo-2,3,4,5-tetrahydro- IH-benzo [b] [l,4]diazepin-3-yl)-carbamic acid tert- butyl ester [Example 56 a)] with acetic acid anhydride yielded the tide compound as a white solid; MS: m/e =334 (M+H)+.
b) (S)-5-Acetyl-3-amino-l-methyl-l,3,4,5-tetrahydro-benzo[b1 [l,4ldiazepin-2-one hydrochloride
In an analogous manner to that described in Example 56 c), the cleavage of the tert- butoxycarbonyl group of the ((S)-5-acetyl-l~methyl-2-oxo-2,3,4,5~tetrahydro-lH- benzo[b] [l,4]diazepin-3-yl)-carbamic acid tert-butyl ester yielded the tide compound as a light yellow solid which was engaged in the next step without further purification; MS: m/e =234 (M+H)+.
c (S -N-((S -5-Acetyl-l-methyl-2-oxo-2,3,4.5-tetrahvdro-lH-benzo[bi ri,4ldiazepin -3-yl -2-hydroxy-propionamide
In an analogous manner to that described in Example 53 c), the condensation of (S)-5- acetyl-3-amino-l-methyl-l,3,4,5-tetrahydro-benzo[b] [l,4]diazepin-2-one hydrochloride with L-(+)-lactic acid yielded the tide compound as a yellow foam; MS: m/e =306 (M+H)+.
d) (2.23-3,3-Pentafluoro-propyl -carbamic acid (S -l-((S)-5-acetyl-l-methyl-2-oxo- 2,3,4,5-tetrahydro-lH-benzo[b1 [l,4]diazepin-3-ylcarbamoyl)-ethyl ester
A solution of 50 mg (0.16 mmol) of (S)-N-((S)-5-acetyl-l-methyl-2-oxo~2,3,4,5- tetrahydro-lH-benzo[b] [l,4]diazepin-3-yl)-2-hydroxy-propionamide in 1.5 ml of pyridine was treated with 39 mg (0.18 mmol) of 4-nitrophenyl chloroformate, and the mixture was stirred at room temperature for 18 h. For the working-up, the solvent was evaporated and the residue chromatographed on silica gel using a 3:l-mixture of heptane and ethyl acetate as the eluent. There were obtained 31 mg (40% of theory) of carbonic acid (S)-l-((S)-5-acetyl-l-methyl-2-oxo-2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin- 3-ylcarbamoyl)-ethyl ester 4-nitro-phenyl ester; MS: m/e =488 (M+NH4)+. The ester was treated with 0.7 ml of 2,2,3,3,3-pentafluoro-propylamine and the mixture was stirred at room temperature for 36 h. For the working-up, 3 ml of ethyl acetate were added and the solution was washed with a saturated solution of sodium carbonate and a saturated solution of sodium chloride. The organic layer was dried over sodium sulphate and evaporated under reduced pressure. For purification, the crude product was chromatographed on silica gel using a gradient of a 98:2- to 95:5-mixture of dichloromethane and methanol as the eluent. There were obtained 12 mg (38% of theory) of the tide compound as a white solid; MS: m/e =498 (M+NH4)+.
Example 58 (2,3,5-Trifluoro-benzyl)-carbamic acid (S)-l-((S)-5-acetyl-l-methyl-2-oxo-2,3,4,5- tetrahydro-lH-benzo[b] [l,4]diazepin-3-ylcarbamoyl)-ethyl ester
Figure imgf000038_0001
In an analogous manner to that described in Example 57 d), the aminolysis of the carbonic acid (S)-l-((S)-5-acetyl-l-methyl-2-oxo-2,3,4,5-tetrahydro-lH- benzo [b] [1,4] diazepin-3-ylcarbamoyl)-efhyl ester 4-nitro-phenyl ester by 2,3,5-trifluoro- benzylamine in dioxane yielded the tide compound as a light yellow solid; MS: m/e =510 (M+NH4)+. Example 59
Figure imgf000039_0001
(S)-5-Met_hyl-4-oxo-3-[(S)-2-(2,2,3,3,3-pentafluoro-propylcarbamoyloxy)- propionylamino]-2,3,4,5-tetrahydro-benzo[b] [1,4] diazepine-1 -carboxylic acid cyclopropylmethyl ester
a) (S)-3-tert-Butoxycarbonylamino-5-methyl-4-oxo-2,3,4,5-tetrahydro- benzolb] [1,4] diazepine-1 -carboxylic acid cyclopropylmethyl ester A solution of 350 mg (1.2 mmol) of (S)-(l-methyl-2-oxo-2,3,4,5-tetrahydro-lH- benzo[b] [l,4]diazepin-3-yl)-carbamic acid tert-butyl ester [Example 56 a)] in 10 ml of N,N~dimethylformamide was treated successively with about 1 g of solid carbon dioxide, 237 mg (1.7 mmol) of bromomethyl-cyclopropane, and 626 mg (1.9 mmol) of cesium carbonate. The reaction mixture was stirred in a sealed flask at 80°C during the weekend. For the working-up, the solvent was evaporated under reduced pressure and the residue was dissolved in a mixture of 30 ml of ethyl acetate and 10 ml of water. The organic layer was separated, dried over sodium sulphate and evaporated under reduced pressure. For the purification, the crude compound was chromatographed on silica gel using a 3:1- mixture of heptane and ethyl acetate as the eluent. There were obtained 410 mg (87% of theory) of the (S)-3-tert-butoxycarbonylamino-5-methyl-4-oxo-2,3,4,5-tetrahydro- benzo[b] [l,4]diazepine-l-carboxylic acid cyclopropylmethyl ester as a white gum; MS: m/e =579 (M+OAc)+.
b) (S)-3-Amino-5-methyl-4-oxo-2,3,4,5-tetrahydro-benzo[bl [l,4]diazepine-l-carboxylic acid cyclopropylmethyl ester hydrochloride
In an analogous manner to that described in Example 56 c) , the cleavage of the tert- butoxy-carbonyl group of the (S)-3-tert-butoxycarbonylamino-5-methyl-4~oxo-2,3,4,5- tetrahydro-benzo[b] [1,4] diazepine-1 -carboxylic acid cyclopropylmethyl ester yielded the tide compound as a light yellow foam.
c) (3S)-((2S)-Hydroxy-propionylamino -5-methyl-4-oxo-2,3,4,5-tetrahydro- benzo[b] [l,4]diazepine-l-carboxylic acid cyclopropylmethyl ester In an analogous manner to that described in Example 53 c), the condensation of (S)-3- amino-5-methyl-4-oxo-2,3,4,5-tetrahydro-benzo[b] [l,4]diazepine-l-carboxylic acid cyclopropylmethyl ester hydrochloride with L-(+)-lactic acid yielded the tide compound as a light yellow foam; MS: m/e =362 (M+H)+.
d) (S -5-Methyl-4-oxo-3-[(S)-2-(2,2,3,3,3-pentafluoro-propylcarbamoyloxy)- propionylamino] -2,3,4,5-tetrahydro-benzo [b] [ 1 ,4] diazepine- 1 -carboxylic acid cyclopropylmethyl ester In an analogous manner to that described in Example 57 d), the condensation of (3S)- ((2S)-hydroxy-propionylamino)-5-methyl-4-oxo-2,3,4,5-tetrahydro- benzo[b] [l,4]diazepine-l-carboxylic acid cyclopropylmethyl ester with 4-nitrophenyl chloroformate yielded the (S)-5-methyl-3-[(S)-2-(4-nitro-phenoxycarbonyloxy)- propionylamino]-4-oxo-2,3,4,5-tetrahydro-benzo[b] [l,4]diazepine-l-carboxylic acid cyclopropylmethyl ester [MS: m/e =544 (M+NH4)+] . Thereupon, its aminolysis by 2,2,3,3,3-pentafluoro-propylamine yielded the tide compound as a white foam; MS: m/e =554 (M+ΝH4)+. Example 60
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-[(S)-5-(cyclopropylmethyl- carbamoyl)-2-oxo-l-(2,2,2-trifluoro-ethyl)-2,3,4,5-tetrahydro-lH- benzo[b] [l,4]diazepin-3-ylcarbamoyl]-ethyl ester
Figure imgf000040_0001
a) [(S)-2-Oxo-l-(2,2,2-trifluoro-ethyl)-2,3,4,5-tetrahvdro-lH-benzo[b][ 4ldiazeρin-3- yll-carbamic acid tert-butyl ester 1RO4898946-000! In an analogous manner to that described in Example 53 a), the alkylation of the (S)-(2- oxo-2,3,4,5-tetrahydro-lH-benzo[b] [1,4] diazepin-3-yl)-carbamic acid tert-butyl ester with 2,2,2-trifluoroethyl triflate, yielded, after chromatography on silica gel using a 99:1- mixture of dichloromethane and methanol as the eluent, the tide compound as a white foam; MS: m/e =360 (M+H)+.
b (S -3-Amino-l-(2,2,2-trifluoro-eτhyl - 3,4,5-tetrahydro-benzo[b1 [ 4ldiazepin-2- one In an analogous manner to that described in Example 53 b) , the cleavage of the tert- butoxy-carbonyl group of the [(S)-2-Oxo-l-(2,2,2-trifluoro-ethyl)-2,3,4,5-tetrahydro- lH-benzo[b] [l,4]diazepin-3-yl]-carbamic acid tert-butyl ester yielded the tide compound as a light yellow solid; MS: m/e =260 (M+H)+.
c) (3S)-[(2S)-Hvdroxyl-N-r2-oxo-l-(2,2,2-trifluoro-ethyl)-2,3.4,5-tetrahydro-lH- benzo [bi l ,4] diazepin-3-yl] -propionamide
In an analogous manner to that described in Example 53 c), the condensation of (S)-3- amino-l-(2,2,2-trifluoro-ethyl)-l,3,4,5-tetrahydro-benzo[b] [l,4]diazepin-2-one with L- (+)-lactic acid yielded the tide compound as a yellow solid; MS: m/e =332 (M+H)+.
d) 4-Oxo-(3S)-[(2S)-(2,2,3,3,3-pentafluoro-propylcarbamoyloxy)-propionylamino1-5- (2,2,2-trifluoro-ethyl)-2,3,4,5-tetrahydro-benzo[b] [l,4]diazepine-l-carboxylic acid 4- nitro-phenyl ester In an analogous manner to that described in Example 57 d), the reaction of an excess of 4-nitrophenyl chloroformate with (3S)-[.(2S)-hydroxy]-Ν-[2-oxo-l-(2,2,2-trifluoro- ethyl)-2,3,4,5-tetrahydro- IH-benzo [b] [ 1,4] diazepin-3-yl] -propionamide yielded the intermediate (3S)-[(2S)-(4-nitro-phenoxycarbonyloxy)-propionylamino]-4-oxo-5- (2,2,2-trifluoro-ethyl)-2,3,4,5-tetrahydro-benzo[b] [l,4]diazepine-l-carboxylic acid 4- nitro-phenyl ester, which was, thereafter, transformed by treatment with 2,2,3,3,3- pentafluoropropylamine into the tide compound and obtained as a white solid; MS: m/e =689 (M+NH4)+.
e) (2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-[(S)-5-(cyclopropylmethyl- carbamoyl -2-oxo-l-(2,2,2-trifluoro-ethyl)-2,3,4,5-tetrahvdro-lH- benzo[b] [l,4]diazepin-3-ylcarbamoyl]-ethyl ester
A solution of 46 mg (0.07 mmol) of 4-oxo-(3S)-[(2S)-(2,2,3,3,3-pentafluoro- propylcarbamoyloxy)-propionylamino]-5-(2,2,2-trifluoro-ethyl)-2,3,4,5-tetrahydro- benzo[b] [1,4] diazepine-1 -carboxylic acid 4-nitro-phenyl ester in 0.5 ml of dioxane was treated at room temperature with 0.3 ml of aminomethyl-cyclopropane. The mixture was stirred during 2.5 h, then evaporated under reduced pressure. The residue was chromatographed on silica gel using a 98:2-mixture of dichloromethane and methanol as the eluent. There were obtained 6 mg (15% of theory) of the tide compound as a white solid; MS: m/e =604 (M+H)+. Example 61 (2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000042_0001
a) (-)-(S)-2-Hydroxy-N-((S)-5-methyl-6-oxo-6,7-dihvdro-5H-dibenzo[b,d1azeρin-7- yl) -propionamide
The tide compound, MS: m/e = 311.3 (M+H+), was prepared in analogy to example la) from (-)-(S)-7-amino-5-methyl-5H,7H-dibenzo[b,d]azepin-6-one hydrochloride and L- (+)-lactic acid.
b) (2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-((S -5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin-7-ylcarbamoyl) -ethyl ester
The tide compound, MS: m/e = 486.4 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3-ρentafluoropropylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo- 6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide.
Example 62 (2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-((R)-5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000042_0002
a) (+ -(S)-2-Hvdroxy-Ν-((R)-5-meτhyl-6-oxo-6,7-dihvdro-5H-dibenzo[b,d1azepin-7- yl) -propionamide
The tide compound, MS: m/e = 311.3 (M+H+), was prepared in analogy to example la) from (+)-(R)-7-amino-5-methyl-5H,7H-dibenzo[b,d]azepin-6-one hydrochloride and L-(+)-lactic acid.
b) (2,23,3-3-Pentafluoro-propyl)-carbamic acid (S)-l-((R -5-methyl-6-oxo-6,7- dihydro-5H-dibenzo[b,d] azepin-7-ylcarbamoyl)-ethyl ester
The tide compound, MS: m/e = 486.4 (M+H+), was prepared in analogy to example 6 from 2,2,3,3,3-pentafluoropropylamine and (+)-(S)-2-hydroxy-N-((R)-5-methyl-6-oxo- 6,7-dihydro-5H-dibenzo [b,d] azepin-7-yl)-propionamide.
Example 63
(3,3,3-Trifluoro-propyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000043_0001
The tide compound, MS: m/e = 450.4 (M+H+), was prepared in analogy to example 6 from 3,3,3-trifluoropropylamine and (~)~(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7- dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide.
Example 64 (3,3,4,4,4-Pentafluoro-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000043_0002
The tide compound, MS: m/e = 500.4 (M+H+), was prepared in analogy to example 6 from 3,3,4,4,4-pentafluorobutylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo- 6,7-dihydro-5H-dibenzo [b,d] azepin-7-yl)-propionamide.
Example 65
(2,2,3,3,4,4,4-Heptafluoro-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000043_0003
The title compound, MS: m/e = 536 (M+H+), was prepared in analogy to example 6 from (2,2,3,3,4,4,4-heptafluoro-butyl)-amine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo- 6,7-dihydro-5H-dibenzo [b,d] azepin-7-yl)-propionamide. Example 66
(3,3,4,4,5,5,6,6,6-Nonafluoro-2-hydroxy-hexyl)-carbamic acid l-(5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000044_0001
The tide compound, MS: m/e = 616 (M+H+), was prepared in analogy to example 6 from l-amino-3,3,4,4,5,5,6,6,6-nonafluoro-hexan-2-ol and (-)-(S)-2-hydroxy-N-((S)-5- methyl-6-oxo-6,7-dihydro-5H-dibenzo [b,d] azepin-7-yl) -propionamide.
Example 67
(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-Pentadecafluoro-octyl)-carbamic acid (S)-l-((S)-5-methyl- 6-oxo-6,7-dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000044_0002
The tide compound, MS: m/e = 736 (M+H+), was prepared in analogy to example 6 from (2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluoro-octyl)-amine and (-)-(S)-2-hydroxy-Ν- ((S)-5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d] azepin- 7-yl) -propionamide.
Example 68
(2,2,2-Trifluoro-ethyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000044_0003
The title compound, MS: m/e = 436.5 (M+H+), was prepared in analogy to example 6 from 2,2,2-trifluoroethylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7- dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide. Example 69
(4,4,4-Trifluoro-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000045_0001
The tide compound, MS: m/e = 464.5 (M+H+), was prepared in analogy to example 6 from 4,4,4-trifluoro-butylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-yl) -propionamide.
Example 70
(3,3,4,4-Tetrafluoro-butyl)-carbamic acid (S)-l- ((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000045_0002
The tide compound, MS: m/e = 482.6 (M+H+), was prepared in analogy to example 6 from 3,3,4,4-tefrafluoro-butylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl~6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-yl)-propionamide.
Example 71
Propyl-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- γlcarbamoyl)-ethyl ester Chiral
Figure imgf000046_0001
The tide compound, MS: m/e = 396.4 (M+H+), was prepared in analogy to example 6 from Propylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-yl) -propionamide.
Example 72
Pentyl-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- ylcarbamoyl)-ethyl ester
Figure imgf000046_0002
The tide compound, MS: m/e = 424 (M+H τ+ ), was prepared in analogy to example 6 from n-pentylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-yl)-propionamide. Example 73
(3,3-Dimethyl-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl) -ethyl ester
Figure imgf000046_0003
The tide compound, MS: m/e = 438 (M+H+), was prepared in analogy to example 6 from (3,3-dimethyl-butyl)-amine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin-7-yl) -propionamide. Example 74
((£)-But-2-enyl)-carbamic cid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl) -ethyl ester
Figure imgf000047_0001
The tide compound, MS: m/e = 408 (M+H+), was prepared in analogy to example 6 from crotylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-yl) -propionamide. Example 75
((E)-3,7-Dimethyl-octa-2,6-dienyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000047_0002
The tide compound, MS: m/e = 490 (M+H+), was prepared in analogy to example 6 from (E)-3,7-dimethyl-octa-2,6-dienylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo- 6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide.
Example 76
(2-Methoxy-ethyl)-carbamic acid (S)- l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000047_0003
The tide compound, MS: m/e = 412.5 (M+H+), was prepared in analogy to example 6 from 2-methoxyethylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin- 7-yl) -propionamide. Example 77
(3-Methoxy-propyI)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester
Figure imgf000048_0001
The title compound, MS: m/e = 426.5 (M+H+), was prepared in analogy to example 6 from 3-methoxypropylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7- dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide.
Example 78
(2-Trimemylsβanyl-ethyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000048_0002
The tide compound, MS: m/e = 454.5 (M+H+), was prepared in analogy to example 6 from 2-trimethylsilanyl-ethylamine and (-)-(S)-2-hydroxy-N-((S)-5-methyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin-7-yl)-propionamide. Example 79
Phenyl-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- ylcarbamoyl)-ethyl ester
The tide compound, MS: m/e = 430.3 (M+H+), was prepared in analogy to example 1 from phenylisocyanate and (S)-2-hydroxy-N-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl)-propionamide. Example 80 (2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-((S)-6-oxo-6,7-dihydro-5H- dibenzo[b,d] azepin-7-ylcarbamoyl) -ethyl ester
Figure imgf000049_0001
a) 5-(4-Methoxy-benzyl)-5H,7H-dibenzo [b,dl azepin-6-one
To a solution of 0.82 g (4 mmol) of 5H,7H-dibenzo[b,d]azepin-6-one in 15 ml of dimethylformamide at room temperature 0.20 g (5 mmol) of sodium hydride 55% in oil was added. After stirring for 30 min at room temperature 0.75 g (5 mmol) of p- methoxybenzyl chloride were added and stirring was continued at room temperature for 2 hours. For workup the mixture was distributed between water and ethyl acetate. The organic layer was re-extracted with 1 N hydrochloric acid and the aqueous layers were washed with ethyl acetate. The combined organic layers were dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography (hexane / ethyl acetate = 1:1) to yield 1.175 g (91%) of 5-(4-methoxybenzyl)-5H,7H- dibenzo[b,d]azepin-6-one as a colourless oil; MS : m/e : 330.4 (M+H+).
b) (RS)-7-Amino-5-(4-methoxy-benzyl -5H,7H-dibenzo[b,dlazepin-6-one
To a solution of 1.15 g (3.5 mmol) 5-(4-methoxybenzyl)-5H,7H-dibenzo[b,d]azepin-6- one in 15 ml of toluene 0.836 g (7 mmol) of isoamyl nitrite were added and the mixture was cooled to 0°C. A solution of 21.4 ml (10.5 mmol) of potassium bis(trimethylsilyl)amide (0.5 M in toluene) was added slowly and stirring was continued for 2 hours at this temperature. Sodium hydrogensulphate solution was added and the mixture was extracted two times with ethylacetate.
The combined organic layers were re-extracted with water and dried (MgSO4). After evaporation of the solvent a solid was obtained, that was purified by column chromatography (dichloromethane / methanol = 95:5) to yield 1.03 g (81%) oxime. This compound was dissolved in ethanol (5 ml) and 1.5 ml of 2N hydrochloric acid were added. Palladium on carbon (10%, Degussa 1835, 100 mg) was added and the mixture was hydrogenated at 5- bar H2 pressure for 24 hours at room temperature. The catalyst was filtered off and the solvent was evaporated. The residue was partitioned between dichloromethane (5 ml) and 4N hydrochloric acid (2 ml). The aqueous solution was separated, set to basic pH with sodium hydroxide and extracted 2 times with ethyl acetate. After drying (MgSO4) and evaporation of the ethyl acetate 0.8 g (63%) of the tide compound was obtained as a white solid. MS : m/e : 345.3 (M+H+).
c) (S)-7-amino-5-(4-methoxy-benzyl)-5H,7H-dibenzo[b,dlazepin-6-one
Racemic (RS)-7-amino-5-(4-methoxy-benzyl)-5H,7H-dibenzo[b,d]azepin-6-one was separated by chromatography on Chiralpak AD with a l:3-mixture of isopopanol and heptane as the eluent to yield:
(S)-7-amino-5-(4-methoxy-benzyl)-5H,7H-dibenzo[b,d]azepin-6-one, [α] 589 = -146° (l% in CHCl3) and
(R)-7-amino-5-(4-methoxy-benzyl)-5H,7H-dibenzo[b,d]azepin-6-one, [α] 589 = +148° (l% in CHCl3).
d) (S -7-Amino-5H,7H-dibenzo [b,d] azepin-6-one
A solution of 0.55 g (1.6 mmol) (S)-7-amino-5-(4-methoxy-benzyl)-5H,7H- dibenzo[b,d]azepin-6-one, 3.74 ml (50 mmol) trifluoroacetic acid and 1.4 ml (16 mmol) trifluormethane sulfonic acid in 38 ml dichloromethane was stirred at room temperature for 4 hours. The solvent was distilled off and extraction with aqueous sodium bicarbonate solution/ ethyl acetate followed by chromatography on silicagel with ethylacetate/methanol (100-95/0-5) yielded 0.35 g (96%) (S)-7-amino-5H,7H- dibenzo[b,d]azepin-6-one as orange solid; MS: m/e : 225.4 (M+H+). e) (S)-2-Hydroxy-Ν-((S)-6-oxo-6,7-dihydro-5H-dibenzorb,d1azepin-7-yl)- propionamide
A solution of 0.20g (0.9 mmol) (S)-7-amino-5H,7H-dibenzo[b,d]azepin-6-one in 8 ml tetrahydrofurane was treated at 0°C with 0.09 g (0.99 mmol) L-lactic acid, 0.14 g (0.9 mmol) 1-hydroxybenzotriazole hydrate, 314 μl (1.8 mmol) N-ethyldiisopropylamine and 0.18 g (0.9 mmol) N-(3-dimethylaminopropyl)-N'-ethyl-carbodiimid-hydrochlorid. After stirring at room temperature overnight the mixture was extracted with IN aqueous hydrochloric acid/ethylacetate. Purification by chromatography on silicagel with ethylacetate/cyclohexane (0-100/100-0) yielded 0.19 g (70%) (S)-2-hydroxy-N-((S)-6- oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl)-propionamide as white solid; MS : m/e : 297.1 (M+H+). f) Carbonic acid 4-nitro-phenyl ester (S)-l-((S)-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl -ethyl ester
0.17 g (0.57 mmol) (S)-2-hydroxy-N-((S)-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- yl) -propionamide in 5 ml dichloromethane were stirred with 93 μl (1.15 mmol) pyridine and 0.14 g (0.69 mmol) 4-nitrophenyl chloroformate at room temperature overnight. Chromatography on silicagel with ethylacetate/cyclohexane (0-100/100-0) gave 0.27 mg (75%) carbonic acid 4-nitro-phenyl ester (S)-l-((S)-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester as white solid; MS : m/e : 462.3 (M+H+).
g) (2,2333~Pentafluoro-propyl)-carbamic acid (S)-l-((S)-6-oxo-6.7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester
0.12 g (0.25 mmol) carbonic acid 4-nitro-phenyl ester (S)-l-((S)-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester and 543 μl 2,2,3,3,3.pentafluoropropylamine were stirred at room temperature over night. Chromatography on silicagel with dichloromethane/ ethylacetate (100-0 to 75-25) yielded 0.075 g (63%) (2,2333-pentafluoro-propyD-carbamic acid (S)-l-((S)-6-oxo-6,7- dihydro-5H-dibenzo[b.d]azepin-7-ylcarbamoyl -ethyl ester as white solid, MS : m/e : 472.1 (M+H+), [α] 589 = -76.4° (1% in MeOH).
Example 81
(3,3,3-Trifluoro-propyl)-carbamic acid (S)-l-((S)-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000051_0001
The tide compound, MS: m/e = 436 (M+H+), was prepared in analogy to example 80 f) and g) from 3,33-trifluoropropylamine and (S)-2-hydroxy-N-((S)-6-oxo-6,7-dihydro- 5H-dibenzo [b,d] azepin-7-yl) -propionamide.
Example 82
(2,2,3,3>3-Pentafluoro-propyl)-carbamic acid (S)- 1- ( (S)-5-cyclopropylmethyl-6-oxo-6,7- dihydro-5H-dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester
Figure imgf000052_0001
a) (S -7-Amino-5-cyclopropylmethyl-5H,7H-dibenzorb,d1azepin-6-one
(RS)-7-Amino-5-cyclopropylmethyl-5H,7H-dibenzo[b,d]azepin-6-one was separated by HPLC on Chiralpak AD with using a l:4-mixture of isopropanol and heptane as the eluent to give (S)-7-amino-5-cyclopropylmethyl-5H,7H-dibenzo[b,d]azepin-6-one, [α] 589 = -162° (1% in MeOH), and (R)-7-amino-5-cycloρropylmethyl-5H,7H- dibenzo[b,d]azepin-6-one, [α] 589 = +163° (1% in MeOH).
b) (S)-N-((S)-5-Cyclopropylmethyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d1azepin-7-yl)-2- hydroxy-propionamide
A solution of 0.47g (1.69 mmol) (S)-7-amino-5-cyclopropylmethyl-5H,7H- dibenzo[b,d]azepin-6-one in 15 ml tetrahydrofurane was treated at 0°C with 0.17 g (1.86 mmol) L-lactic acid, 0.26 g (1.69 mmol) 1-hydroxybenzotriazole hydrate, 590 μl (3.38 mmol) Ν-ethyldiisopropylamine and 0.33 g (1.69 mmol) N-(3-dimethylaminopropyl)- N'-ethyl-carbodiimid-hydrochlorid. After stirring at room temperature overnight the mixture was extracted with IN aqueous hydrochloric acid/ethylacetate. Purification by chromatography on silicagel with ethylacetate/ cyclohexane (0-100/100-0) yielded 0.50 g (84%) (S)-N-((S)-5-cyclopropylmethyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7- yl)-2-hydroxy-propionamide as white solid; MS : m/e: 351.4 (M+H+),
[α] 589 = -131° (1% in MeOH).
c) Carbonic acid (S)-l-((S)-5-cyclopropylmethyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d1azepin-7-ylcarbamoyl)-ethyl ester 4-nitro-phenyl ester
0.46 g (1.32 mmol) (S)-Ν-((S)-5-cycloproρylmethyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl)-2-hydroxy-propionamide in 15 ml dichloromethane were stirred with 213 μl (2.64 mmol) pyridine and 033 g (1.58 mmol) 4-nitrophenyl chloroformate at room temperature overnight. Chromatography on silicagel with ethylacetate/cyclohexane (0-100/100-0) gave 0.63 mg (92%) carbonic acid (S)-l-((S)-5- cyclopropylmethyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester 4-nitro-phenyl ester as a white foam; MS : m/e : 516.5 (M+H+), [α] 589 = -164° (0.94% in MeOH). d) (2,2333-Pentafluoro-propyl)-carbamic acid (S -l-((S)-5-cyclopropylmethyl-6-oxo- 6,7-dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl -ethyl ester
0.61 g (1.18 mmol) carbonic acid (S)-l-((S)-5-cyclopropylmethyl-6-oxo-6,7-dihydro- 5H-dibenzo[b,d]azepin-7-ylcarbamoyl) -ethyl ester 4-nitro-phenyl ester and 2.5 ml 2,2,3,3,3.pentafluoropropylamine were stirred at room temperature over night.
Chromatography on silicagel with dichloromethane/ethylacetate (100-70/0-30) yielded 0.61 g (98%) (2,2,333-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5- cyclopropylmethyl-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester as white solid; MS : m/e : 526.0 (M+H+), [α] 589 = -94° (1.1% in MeOH). Example 83
(2,2,3,3,3-Pentafluoro-propyl)-carbamic acid (S)-l-[(S)-6-oxo-5-(2,2,2-trifluoro-ethyl)- 6,7-dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl] -ethyl ester
Figure imgf000053_0001
a) 7-Amino-5-(2,2,2-trifluoro-ethyl)-5H,7H-dibenzo[b,d]azepin-6-one
Racemic (RS)-7-amino-5-(2,2,2-trifluoro-ethyl)-5H,7H-dibenzo[b,d]azepin-6-onewas separated by chromatography on Chiralpak AD using a 15:85-mixture of isopopanol and heptane as the eluent to yield (S)-7-amino-5-(2,2,2~trifluoro-ethyl)-5H,7H~ dibenzo[b,d]azepin-6-one, [α] 589 = -29° (1% in CHC13) and
(R)-7-amino-5-(2,2,2-trifluoro-ethyl)-5H,7H-dibenzo[b,d]azeρin-6-one, [α] 589 = +26° (l% in CHCl3).
b) (S)-2-Hvdroxy-N-[(S)-6-oxo-5-f2,2,2-trifluoro-ethyl)-6J-dihvdro-5H- dibenzo [b,d] azepin-7-yl] -propionamide
A solution of 0.26 g (0.85 mmol) (S)-7-amino-5-(2,2,2-trifluoro-ethyl)-5H,7H- dibenzo [b,d]azepin-6-one in 18 ml tetrahydrofurane was treated at 0°C with 0.08 g (0.94 mmol) L-lactic acid, 0.13 g (0.85 mmol) 1-hydroxybenzotriazole hydrate, 297 μl (1.70 mmol) Ν-ethyldiisopropylamine and 0.17 g (0.85 mmol) N-(3-dimethylaminopropyl)- N'-eΛyl-carbodiimid-hydrochlorid. After stirring at room temperature overnight the mixture was extracted with IN aqueous hydrochloric acid/ethylacetate. Purification by chromatography on silicagel with ethylacetate/heptane (0-100/100-0) yielded 0.22 g (68%) (S)-2-hydroxy-N-[(S)-6-oxo-5-(2,2,2-trifluoro-ethyl)-6,7-dihydro-5H- dibenzo[b,d]azepin-7-yl] -propionamide as grey solid, MS : m/e: 379.4 (M+H+), [α] 589 = -23° (1.1% in CHC13).
c) Carbonic acid 4-nitro-phenyl ester (S)-l-[(S)-6-oxo-5-(2.2,2-trifluoro-ethyi)-6,7- dihydro-5H-dibenzo [b,d] azepin-7-ylcarbamoyl] -ethyl ester
0.20 g (0.53 mmol(S)-2-hydroxy-N-[(S)-6-oxo-5-(2,2,2-trifluoro-ethyl)-6,7-dihydro- 5H-dibenzo[b,d]azepin-7-yl] -propionamide in 5 ml dichloromethane were stirred with 85 μl (1.06 mmol) pyridine and 0.13 g (0.64 mmol) 4-nitrophenyl chloroformate at room temperature overnight. Chromatography on silicagel with ethylacetate/ cyclohexane (0- 100/100-0) gave 0.07 mg (23%) carbonic acid 4-nitro-phenyl ester (S)-l-[(S)-6-oxo-5- (2,2,2-trifluoro-ethyl)-6,7-dihydro-5H-dibenzo[b,d]azepin-7-ylcarbamoyl] -ethyl ester as white solid, MS : m/e : 544.3 (M+H+).
d) (2,2333-Pentafluoro-propyl)-carbamic acid (S)-l-[(S)-6-oxo-5-f2,2,2-trifluoro- ethyl)-6 -dihydro-5H-dibenzo[b,dl azepin-7-ylcarbamoyl] -ethyl ester
0.065 g (0.12 mmol) carbonic acid 4-nitro-phenyl ester (S)-l-[(S)-6-oxo-5-(2,2,2- trifluoro-ethyl)-6,7-dihydro-5H-dibenzo[b,d]azepin-7-ylcarbamoyl] -ethyl ester and 0.26 ml 2,2,333.pentafluoropropylamine were stirred at room temperature over night. Chromatography on silicagel with dichloromethane/ ethylacetate ( 100-40/0-60) yielded 0.06 g (86%) (2,2,333-Pentafluoro-propyl)-carbamic acid (S)-l-[(S)-6-oxo-5-(2,2,2- trifluoro-ethyl)-6,7-dihydro-5H-dibenzo[b,d]azepin-7-ylcarbamoyl]-ethyl ester as white foam, MS : m/e : 554.3 (M+H+), [α] 589 = -4.4° (0.75 % in CHC13).

Claims

Claims
1. Compounds of the general formula
Figure imgf000055_0001
wherein
R1 is -(CHR')q-aryl or -(CHR')q-heteroaryl, which are unsubstituted or mono, di- or tri-substituted by lower alkyl, lower alkoxy, CF3 or halogen, or is lower alkyl, lower alkenyl, -(CH2)n-Si(CH3)3, -(CH2)n-O-lower alkyl, -(CH2)n-S-lower alkyl, -(CH2)q-cycloalkyl, -(CH2)n-[CH(OH)]m-(CF2)p-CHqF(3-q), or is -(CH2)n-CR2-CF3, wherein the two R radicals form together with the carbon atom a cycloalkyl ring;
R' is hydrogen or lower alkyl;
n is 1, 2 or 3; m is 0 or 1; p is 0, 1, 2, 3, 4, 5 or 6; q is 0, l,-2 or 3;
R2 is hydrogen or lower alkyl;
R3 is hydrogen, lower alkyl, -CH2CF2CF3, CH2CF3, (CH2)2CF3, CF3, CHF2, CH2F or is aryl, optionally mono, di or tri-substituted by halogen, or is -(CH2)nNR5R6, wherein R5 and R6 are independentiy from each other hydrogen or lower alkyl;
R4 is one of the following groups
Figure imgf000056_0001
wherein R7 is hydrogen, lower alkyl, -(CH2)n-CF3 or -(CH2)n-cycloalkyl;
R8 is hydrogen, lower alkyl, -C(O)-phenyl, -C(O)-lower alkyl, -C(O)O-(CH2)n- cycloalkyl, -C(O)O-(CH2)n-lower alkyl, -C(O)NH-(CH2)n-lower alkyl or -C(O)NH-(CH2)n-cycloalkyl;
R9 is hydrogen, lower alkyl, -(CH2)n-cycloalkyl or -(CH2)n-CF3;
and to pharmaceutically suitable acid addition salts, optically pure enantiomers, racemates or diastereomeric mixtures thereof.
2. Compounds of the general formula
Figure imgf000056_0002
wherein
R1 is -(CH2)n-aryl or -(CH2)n-heteroaryl, which are unsubstituted or mono, di- or tri- substituted by lower alkyl, lower alkoxy, CF3 or halogen, or is lower alkyl, -(CH2)n-O-lower alkyl, -(CH2)n-S-lower alkyl, -(CH2)n-cycloalkyl, -(CH2)n-CH2F, -(CH2)n-CF3, -(CH2)n-CF2-CF3, -(CH2)n-CF2-CHF2, -(CH2)n-CR2-CF3, and wherein the two R radicals form together with the carbon atom a cycloalkyl ring;
R2 is hydrogen or lower alkyl; R3 is hydrogen, lower alkyl, -CH2F, CHF2, CF3, aryl, optionally mono, di or tri- substituted by halogen, or is -(CH2)nNR5R6, wherein R5 and R6 are independendy from each other hydrogen or lower alkyl;
R is one of the following groups
Figure imgf000057_0001
wherein R7 is lower alkyl or -(CH)2-cycloalkyl;
R8, R9 are independendy from each other hydrogen, lower alkyl, -(CH2)n-cycloalkyl or -C(O) -phenyl;
and pharmaceutically suitable acid addition salts, optically pure enantiomers, racemates or diastereomeric mixtures thereof.
3. Compounds of formula I in accordance with claim 1, wherein R4 is a).
4. Compounds of formula I in accordance with claim 3, wherein R1 is -CH2-phenyl, unsubstituted or mono, di- or tri-substituted by lower alkyl, lower alkoxy, CF3 or halogen.
5. Compounds of formula I in accordance with claim 4, wherein the compounds are (2,3-difluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(2-trifluoromethyl-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(2-methyl-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester (2,4-difluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(3,4-difluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-657-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester, (2,3,5-trifluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester or
(2,3,6-trifluoro-benzyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d] azepin-7-ylcarbamoyl)-ethyl ester.
6. Compounds of formula I in accordance with claim 3, wherein R1 is
-(CH2)n-[CH(OH)]m-(CF2)p-CHqF(3-q).
7. Compounds of formula I in accordance with claim 6, which compounds are
(2,2,2-trifluoro-ethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester,
(2,2,3,3,3-pentafluoro-propyl)-carbamic acid (S)- l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester,
(2,2,3,3,3-pentafluoro-propyl)-carbamic acid 2-fluoro-l-(5-methyl-6-oxo-6,7-dihydro-
5H-dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester, (2,2,3,3,3-pentafluoro-propyl)-carbamic acid l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-propyl ester,
(2,2,2-trifluoro-ethyl)-carbamic acid l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-propyl ester,
(2,2,2-trifluoro-ethyl)-carbamic acid 2-fluoro-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d]azepin-7-ylcarbamoyl) -ethyl ester,
(2,2,333-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-
5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(3,33-trifluoro-propyl)-carbamic acid (S)-l-( (S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester, (3,3>4,4,4-pentafluoro-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo[b,d]azepin-7-ylcarbamoyl)-ethyl ester,
(2,233>4,4,4-heptafluoro-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-
5H-dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(2,233.4,4,5,5,6,6,7,7,8,8,8-pentadecafluoro-octyl)-carbamic acid (S)-l-((S)-5-methyl- 6-oxo-6,7-dihydro-5H-dibenzo [b,d] azepin- 7-ylcarb moyl) -ethyl ester,
(2,2,2-trifluoro-ethyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester, (2,233,3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester,
(3,3,3-trifIuoro-propyl)-carbamic acid (S)-l-((S)-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin- 7-ylcarbamoyl)-ethyl ester, (2,2,333-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-cyclopropylmethyl-6-oxo-6,7- dihydro-5H-dibenzo[b,d]azepin-7-ylcarbamoyl) -ethyl ester or
(2,2,33,3-pentafluoro-propyl)-carbamic acid (S)-l-[(S)-6-oxo-5-(2,2,2-trifluoro-ethyl)- 6,7-dihydro-5H-dibenzo[b,d] azepin-7-ylcarbamoyl] -ethyl ester.
8. Compounds of formula I in accordance with claim 3, wherein R1 is
-(CH2)n-cycloalkyl.
9. Compounds of formula I in accordance with claim 8, wherein the compound is cyclopropylmethyl-carbamic acid 3-methyl-l-(5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-butyl ester.
10. Compounds of formula I in accordance with claim 3, wherein R1 is -(CH2)n-CR2-CF3, wherein the two R radicals form together with the carbon atom a cycloalkyl ring.
11. Compounds of formula I in accordance with claim 10, wherein the compound is
(l-trifluoromethyl-cyclopropylmethyl)-carbamic acid (S)-l-(5-methyl-6-oxo-6,7- dihydro-5H-dibenzo[b,d] azepin-7~ylcarbamoyl)-ethyl ester.
12. Compounds of formula I in accordance with claim 3, wherein R1 is lower alkyl.
13. Compounds of formula I in accordance with claim 12, wherein the compound is (3,3-dimethyl-butyl)-carbamic acid (S)-l-((S)-5-methyl-6-oxo-6,7-dihydro-5H- dibenzo [b,d] azepin-7-ylcarbamoyl)-ethyl ester.
14. Compounds of formula I in accordance with claim 1, wherein R4 is b).
15. Compounds of formula I in accordance with claim 14, wherein the compounds are (2,2,3,3>3-pentafluoro-propyl)-carbamic acid (S)-l-((S)-5-benzoyl-l-methyl-2-oxo- 2,3,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-ylcarbamoyl)-ethyl ester (2,2,333-pentafluoro~propyl)-carbamic acid (S)-l-((S)-5-acetyl-l-methyl-2-oxo- 23,4,5-tetrahydro-lH-benzo[b] [l,4]diazepin-3-ylcarbamoyl)-ethyl ester (S)-5-methyl-4-oxo-3-[(S)-2-(2,2333-pentafluoro-propylcarbamoyloxy)- propionylamino] -2,3,4,5-tetrahydro-benzo [b] [1,4] diazepine- 1 -carboxylic acid cyclopropylmethyl ester or
(2,2,33>3-pentafluoro-propyl)-carbamic acid (S)-l-[(S)-5-(cyclopropylmethyl- carbamoyl)-2-oxo-l-(2,2,2-trifluoro-ethyl)-2,3,4,5-tetrahydro-lH- benzo[b] [l,4]diazepin-3-ylcarbamoyl]-ethyl ester.
16. A process for preparing a compound of formula I as defined in claims 1 - 15, which process comprises a) reacting a compound of formula
Figure imgf000060_0001
with a compound of formula
R CO III
to a compound of formula
Figure imgf000060_0002
wherein R1 - R4 have the meaning as described in claim 1, or b) reacting a compound of formula
Figure imgf000060_0003
with a compound of formula
NHR2R2 II
in the presence of a suitable phosgene equivalent and a base,
to a compound of formula
Figure imgf000061_0001
wherein R1 - R4 have the meaning as described in claim 1, and if desired, converting the compounds obtained into pharmaceutically acceptable acid addition salts.
17. A compound according to any on of claims 1 - 15, whenever prepared by a process as claimed in claim 15 or by an equivalent method.
18. A medicament containing one or more compounds as claimed in any one of claims 1 - 15 and pharmaceutically acceptable excipients.
19. A medicament according to claim 18 for the treatment of Alzheimer's disease.
20. The use of a compound in any one of claims 1 - 15 for the manufacture of medicaments for the treatment of Alzheimer's disease.
21. The invention as hereinbefore described. ***
PCT/EP2004/010821 2003-10-06 2004-09-27 Substituted dibenzo-azepine and benzo-diazepine derivatives useful as gamma-secretase inhibitors WO2005040126A1 (en)

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