# US 5,705,646 A · Substituted pyrazoles as CRF antagonists

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- Number: US 5,705,646 A
- Document ID: US5705646A
- Status: Granted
- Kind: A
- Application number: 08/481,348
- Filed: 1995-06-14
- Granted: 1998-01-06
- Earliest claimed: 1995-06-14
- Assignees: Pfizer Inc.
- Inventors: Gene M. Bright; Willard M. Welch, Jr.
- Web page: https://patentgrep.com/patent/US5705646A

## CPC

- C07D 231/12: with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
- C07D 401/06: linked by a carbon chain containing only aliphatic carbon atoms
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)

## Abstract

The compounds of the formula ##STR1## wherein A, R.sub.1, R.sub.3, Z and Y are as defined herein, have corticotropin-releasing factor (CRF) antagonist activity. They are useful in the treatment of illnesses induced by CRF, such as stress and anxiety related disorders.

## Claims

### Claim 1

A compound of the formula ##STR26## and the pharmaceutically acceptable acid addition salts thereof, wherein R.sub.1 is hydrogen; linear or branched C.sub.1 -C.sub.6 alkyl; C.sub.3 -C.sub.6 alkyl containing one or two non-adjacent double bonds; hydroxy; O(C.sub.1 -C.sub.6 alkyl); SH; S (C.sub.1 -C.sub.6 alkyl); or C.sub.3 -C.sub.6 cycloalkyl; morpholinyl, piperdinyl or aryl which aryl may be substituted by one to three of fluoro, chloro, bromo, hydroxy, O(C.sub.1 -C.sub.6 alkyl), SH, S(C.sub.1 -C.sub.6 alkyl), amino, NH(C.sub.1 -C.sub.6 alkyl), N(C.sub.1 -C.sub.6 alkyl).sub.2, or one of iodo, nitro or cyano, said aryl being selected from the group consisting of phenyl, thienyl, benzothienyl, pyridyl, quinolyl, pyrazinolyl, pyrimidyl, imidazolyl, benzimidazolyl, furanyl, benzofuranyl, thiazolyl, benzothiazolyl, isothiazolyl, benzoisothiazolyl, isoxazolyl, benzisoxazolyl, triazolyl, pyrazolyl, pyrrolyl, indolyl, azaindolyl, oxazolyl, benzoxazolyl, pyrrolidinyl, or thiazolidinyl;
R.sub.3 is linear C.sub.1 -C.sub.6 alkyl, branched C.sub.3 -C.sub.8 alkyl, C.sub.3 -C.sub.8 alkenyl wherein the double bond is not adjacent to X.sub.1 when X.sub.1 is a heteroatom, C.sub.3 -C.sub.7 cycloalkyl(CH.sub.2).sub.n wherein n is 0 to 4, or (CH.sub.2).sub.q Q.sub.1 R.sub.19 wherein q is 0, 1 or 2, Q.sub.1 is O, S, NH, N(C.sub.1 -C.sub.6 alkyl), or a covalent bond when X.sub.1 is not a covalent bond, and R.sub.19 is hydrogen, linear C.sub.1 -C.sub.6 alkyl, branched C.sub.3 -C.sub.8 alkyl, C.sub.3 -C.sub.8 alkenyl, C.sub.3 -C.sub.6 cycloalkyl or C.sub.3 -C.sub.6 cycloalkyl-(CH.sub.2) with the proviso that when q is 1, then X.sub.1 and Q.sub.1 cannot both be a heteroatom;
X.sub.1 is a covalent bond, CH.sub.2, O, S, or NR, wherein R is hydrogen, linear C.sub.1 -C.sub.6 alkyl or branched C.sub.3 -C.sub.8 alkyl;
Y is phenyl, thienyl, benzothienyl, pyridyl, quinolyl, pyrazinolyl, pyrimidyl, imidazolyl, benzimidazolyl, furanyl, benzofuranyl, thiazolyl, benzothiazolyl, isothiazolyl, benz isothiazolyl, isoxazolyl, benz isoxazolyl, triazolyl, pyrazolyl, pyrrolyl, indolyl, azaindolyl, oxazolyl, benzoxazolyl, pyrrolidinyl, thiazolidinyl, morpholinyl, or piperidinyl, each of which may be substituted by one to three of any one of fluoro, chloro, bromo, or methyl, or one of trifluoromethyl; with the proviso that Y is not unsubstituted phenyl;
R.sub.4 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, hydroxy, fluoro, chloro, bromo, iodo or trifluoromethyl;
R.sub.5 is hydrogen, linear C.sub.1 -C.sub.6 alkyl, branched C.sub.3 -C.sub.8 alkyl, C.sub.3 -C.sub.8 alkenyl, or (CH.sub.2).sub.0 --X.sub.2 --(CH.sub.2).sub.r --Q.sub.2 --R.sub.6 ;
X.sub.2 and Q.sub.2 are each independently O, S, NH, N(C.sub.1 -C.sub.6 alkyl), or one of X.sub.1 and Q.sub.2 may be a covalent bond;
R.sub.6 is hydrogen, linear C.sub.1 -C.sub.6 alkyl, branched C.sub.3 -C.sub.8 alkyl, or C.sub.3 -C.sub.8 alkenyl;
o is 1 or 2; and
r is 0, 1 or 2.

### Claim 2 (depends on 1)

A compound according to claim 1 wherein Y is 2,4,6-tri-substituted phenyl.

### Claim 3 (depends on 1)

A compound according to claim 1 wherein Y is 2,4,6-trichlorophenyl, 2,6-dichloro-4-trifluoromethylphenyl, 2,6-dibromo-4-fluorophenyl, 2,6-dimethyl-4-bromophenyl, or 2,4,6-trimethylphenyl.

### Claim 4 (depends on 1)

A compound according to claim 1 wherein X.sub.1 R.sub.3 is ethyl or methylthio.

### Claim 5 (depends on 1)

A compound according to any one of claim 1 wherein R.sub.1 is (C.sub.1 -C.sub.6) alkyl.

### Claim 6 (depends on 1)

A compound according to any one of claim 1 wherein Z is NR.sub.7 R.sub.8 wherein R.sub.7 is phenyl or phenyl substituted by one of fluoro, chloro, trifluoromethyl, nitro, methyl or methoxy.

### Claim 7 (depends on 6)

A compound according to claim 6 wherein R.sub.8 is CH.sub.2 CH.sub.2 CH.sub.2 OH, CH.sub.2 CH.sub.2 OH, or methyl.

### Claim 8 (depends on 1)

A compound according to any one of claim 1 wherein Z is 1,2,3,4-tetrahydroisoquinolin-2-yl substituted by R.sub.5 which is (CH.sub.2).sub.0 --X.sub.2 --(CH.sub.2).sub.r--Q.sub.2 --R.sub.6.

### Claim 9 (depends on 8)

A compound according to claim 8 wherein R.sub.5 is (CH.sub.2).sub.k OH wherein k is 1 to 4, or CH.sub.2 OCH.sub.2 CH.sub.2 OR.sub.6.

### Claim 10 (depends on 1)

A compound according to any one of claim 1 wherein Z is 1, 2, 3, 4-tetrahydroisoquinolin-2-yl, wherein R.sub.5 is substituted at position 3, and the absolute configuration at the 3-position is S or R or R, S.

### Claim 11 (depends on 1)

A compound according to any one of claim 1 wherein Z is of the formula ##STR27## with the absolute configuration at position 3 determined by its derivation from (+)-3-hydroxymethyl-1,2,3,4-tetrahydroisoquinoline, wherein R.sub.19 is methyl, ethyl, isopropyl, cyclopropylmethylene, or 2-hydroxyethyl.

### Claim 12 (depends on 1)

A compound according to claim 1 wherein Z is as defined in (a), B is phenyl, p and m are each 1, and R.sub.5 is CH.sub.2 OCH.sub.3 or CH.sub.2 OCH.sub.2 CH.sub.2 OH.

### Claim 13 (depends on 1)

A composition for the treatment of illnesses induced or facilitated by corticotropin releasing factor or stress-induced depression and headache, abdominal bowel syndrome, inflammatory disorders, immune suppression, HIV infections, Alzheimer's disease, gastrointestinal diseases, anorexia nervosa, hemorrhagic stress, drug and alcohol withdrawal symptoms, drug addiction, or fertility problems, which comprises a compound of the formula I as defined in claim 1 in an amount effective in the treatment of said illnesses, and a pharmaceutically acceptable carrier.

### Claim 14 (depends on 1)

A method for the treatment of (a) illnesses induced or facilitated by corticotropin releasing factor or (b) stress and anxiety related disorders including stress-induced depression and headache, abdominal bowel syndrome, inflammatory disorders, immune suppression, HIV infections, Alzheimer's disease, gastrointestinal diseases, anorexia nervosa, hemorrhagic stress, drug and alcohol withdrawal symptoms, drug addiction, and fertility problems, which comprises administering to a subject in need of such treatment a compound of formula I as defined in claim 1.

### Claim 15 (depends on 1)

A compound according to claim 1 which is 3-methoxymethyl-2-›5-methyl-3-methylsufanyl-1-(2,4,6-trichlorophenyl)-1H-p yrazol-4-ylmethyl!-1,2,3,4-tetrahydroisoquinoline; (3R)-3-methoxymethyl-2-›5-methyl-3-methylsulfanyl-1-(2,4,6-trichlorophenyl )-1H-pyrazol-4-ylmethyl!-1,2,3,4-tetrahydroisoquinoline; 3-methoxymethyl-2-›5-methyl-3-methylsulfanyl-1-(2,6-dichloro-4-trifluorome thylphenyl)-1H-pyrazol-4-ylmethyl!-1,2,3,4-tetrahydroisoquinoline; {2-›5-methyl-3-methylsulfanyl-1-(2,4,6-trichlorophenyl)-1H-pyrazol-4-ylmet hyl!-1,2,3,4-tetrahydroisoquinolin-3-yl}methanol; {2-›5-methyl-3-methylsulfanyl-1-(2,6-dichloro-4-trifluoromethylphenyl)-1H- pyrazol-4-ylmethyl!-1,2,3,4-tetrahydroisoquinolin-3-yl}methanol; 2-{1-(2,6-dichloro-4-trifluoromethylphenyl)-3,5-diethyl-1H-pyrazol-4-ylmet hyl!-naphthalene-2-yloxy}-ethanol; 2-{8-›1-(2,6-dichloro-4-trifluoromethylphenyl)-3,5-diethyl-1H-pyrazol-4-yl methyl!-quinolin-7-yloxy}-ethanol; 2-›3,5-diethyl-1-(2,4,6-trichlorophenyl)-1H-pyrazol-4-ylmethyl!-3-methoxym ethyl-1,2,3,4-tetrahydroisoquinoline; 1-(2,6-dichloro-4-trifluoromethylphenyl)-3,5-diethyl-4-(2-methoxynaphthale n-1-ylmethyl)-1H-pyrazole; 2-›1-(2,6-dichloro-4-trifluoromethylphenyl)-3,5-diethyl-1H-pyrazol-4-ylmet hyl!-3-methoxymethyl-1,2,3,4-tehrahydroisoquinoline;2-›3,5-diethyl-1-(2,4,6 -trimethylphenyl)-1H-pyrazol-4-ylmethyl!-3-methoxymethyl-1,2,3,4-tetrahydro isoquinoline;2-›1-(2,6-dichloro-4-trifluoromethylphenyl)-3,5-diethyl-1H-pyr azol-4-ylmethyl!-3-ethoxymethyl-1,2,3,4-tetrahydrosioquinoline, or 2-›3,5-diethyl-1-(2,4,6-trimethylphenyl)-1H-pyrazol-4-ylmethyl!-3-ethoxyme thyl-1,2,3,4-tetrahydroisoquinoline.