Pyrrolo[1,2-b]pyridazines, pyrrolo[2,1-f]triazin-4(3H)-ones, and related compounds as novel corticotropin-releasing factor 1 (CRF1) receptor antagonists
摘要:
To identify structurally novel corticotropin-releasing factor 1 (CRF1) receptor antagonists, a series of bicyclic core analogs pyrrolo[1,2-b]pyridazines and pyrrolo[2,1-f]triazin-4(3H)-ones, which were designed based on a monocyclic core antagonist, was synthesized and evaluated. Among the compounds tested, 2-difluoromethoxy-4-methylpyridin-5-yl analog 27 was found to show efficacy in a dose-dependent manner in an elevated plus maze test in rats. The discovery process and structure-activity relationship is presented. (C) 2011 Elsevier Ltd. All rights reserved.
Pyrrolo[1,2-b]pyridazines, pyrrolo[2,1-f]triazin-4(3H)-ones, and related compounds as novel corticotropin-releasing factor 1 (CRF1) receptor antagonists
摘要:
To identify structurally novel corticotropin-releasing factor 1 (CRF1) receptor antagonists, a series of bicyclic core analogs pyrrolo[1,2-b]pyridazines and pyrrolo[2,1-f]triazin-4(3H)-ones, which were designed based on a monocyclic core antagonist, was synthesized and evaluated. Among the compounds tested, 2-difluoromethoxy-4-methylpyridin-5-yl analog 27 was found to show efficacy in a dose-dependent manner in an elevated plus maze test in rats. The discovery process and structure-activity relationship is presented. (C) 2011 Elsevier Ltd. All rights reserved.
A compound represented by the formula (I), a salt thereof, an N-oxide thereof, a solvate thereof, or a prodrug thereof:
wherein X
1
represents N and X
2
represents C, or X
1
represents C and X
2
represents N;
Y
1
represents CR
4
or N;
Y
2
represents CH or N;
wherein both Y
1
and Y
2
do not represent N at the same time;
R
1
represents (1) C3-10 branched alkyl which may be substituted or (2) —(CH
2
)
m
—NR
5
R
6
; R
2
, R
3
, and R
4
each independently represent H, C1-4 alkyl, a halo-substituted C1-4 alkyl, C2-4 alkenyl, C2-4 alkynyl, or the like;
R
5
and R
6
each independently represent C1-6 alkyl which may be substituted, or R
5
represents H, and R
6
represents C3-6 branched alkyl which may be substituted; and
Ar represents an aromatic ring which may be substituted, is useful as a pharmacologically active ingredient having a CRF antagonistic activity in preventing and/or treating neuropsychiatric diseases, diseases of peripheral organs or the like.
A compound represented by the formula (I), a salt thereof, an N-oxide thereof, a solvate thereof, or a prodrug thereof:
wherein X1 represents N and X2 represents C, or X1 represents C and X2 represents N;
Y1 represents CR4 or N;
Y2 represents CH or N;
wherein both Y1 and Y2 do not represent N at the same time;
R1 represents (1) C3-10 branched alkyl which may be substituted or (2) -(CH2)m-NR5R6;R2, R3, and R4 each independently represent H, C1-4 alkyl, a halo-substituted C1-4 alkyl, C2-4 alkenyl, C2-4 alkynyl, or the like;
R5 and R6 each independently represent C1-6 alkyl which may be substituted, or R5 represents H, and R6 represents C3-6 branched alkyl which may be substituted; and
Ar represents an aromatic ring which may be substituted, is useful as a pharmacologically active ingredient having a CRF antagonistic activity in preventing and/or treating neuropsychiatric diseases, diseases of peripheral organs or the like.
Pyrrolo[1,2-b]pyridazines, pyrrolo[2,1-f]triazin-4(3H)-ones, and related compounds as novel corticotropin-releasing factor 1 (CRF1) receptor antagonists
To identify structurally novel corticotropin-releasing factor 1 (CRF1) receptor antagonists, a series of bicyclic core analogs pyrrolo[1,2-b]pyridazines and pyrrolo[2,1-f]triazin-4(3H)-ones, which were designed based on a monocyclic core antagonist, was synthesized and evaluated. Among the compounds tested, 2-difluoromethoxy-4-methylpyridin-5-yl analog 27 was found to show efficacy in a dose-dependent manner in an elevated plus maze test in rats. The discovery process and structure-activity relationship is presented. (C) 2011 Elsevier Ltd. All rights reserved.