Aminoquinoline melanin-concentrating hormone 1-receptor (MCH1-R) antagonists.

Abstract:

:Structure-activity relationships of a 4-aminoquinoline MCH-1R antagonist lead series were explored by synthesis of analogs with modifications at the 2-, 4- and 6-positions of the original HTS hit. Improvements to the original screening lead were made by addition of lipophilic groups at the 2-position and biphenyl, cyclohexyl phenyl and hydrocinnamyl carboxamides at the 6-position. Viable modifications of the 4-amino group were limited and did not allow further optimization of the physical-chemical properties of this class of compounds. Transposition of the 4-amino group to the 2-position of the quinoline core structure provided the 2-aminoquinoline lead class with similar MCH1R binding affinity. A series of 2-aminoquinoline compounds was prepared and evaluated in MCH-1R binding and functional antagonist assays. Small dialkyl, methylalkyl, methylcycloalkyl and cyclic amines along with 3-substituted pyrrolidines were tolerated at the quinoline 2-position. The in vivo efficacy of compound A was explored and compared to that of a related inactive compound B to determine their effects on food intake and body weight in rodents. The biological activities of this matched active -inactive pair provide in vivo proof of concept in rodents that antagonism of MCH1R by a 2-aminoquinoline MCH1R antagonist which led to a reduction of food intake in an acute feeding assay paradigm.

journal_name

Curr Top Med Chem

authors

DeVita RJ

doi

10.2174/156802607782194789

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

1433-9

issue

15

eissn

1568-0266

issn

1873-4294

journal_volume

7

pub_type

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