Design, synthesis, and pharmacological evaluation of N-bicyclo-5-chloro-1H-indole-2-carboxamide derivatives as potent glycogen phosphorylase inhibitors
摘要:
As a result of the various N-bicyclo-5-chloro-1H-indole-2-carboxamide derivatives with a hydroxy moiety synthesized in an effort to discover novel glycogen phosphorylase (GP) inhibitors, 5-chloro-N-(5-hydroxy-5,6,7,8-tetrahydronaphthalen-2-yl)-1H-indole-2-carboxamide (5b) was found to have potent inhibitory activity. The introduction of fluorine atoms both at a position adjacent to the hydroxy group and in the central benzene moiety lead to the optically active derivative 5-chloro-N-[(5R)-1,3,6,6-tetrafluoro-5-hydroxy-5,6,7,8-tetrahydronaphthalen-2-yl]-1H-indole-2-carboxamide(25e alpha, which was the most potent compound in this series (IC(50) = 0.020 mu M). This compound inhibited glucagon-induced glucose output in cultured primary hepatocytes with an IC(50) value of 0.69 mu M, and showed oral hypoglycemic activity in diabetic db/db mice at 10 mg/kg. Compound 25e alpha also had an excellent pharmacokinetic profile, with high oral bioavailability and a long plasma half-life, in male SD rats. The binding mode of 25e alpha to this molecule and the role of fluorine atoms in that binding were speculated in an enzyme docking study. (c) 2008 Elsevier Ltd. All rights reserved.
Conformationally constrained analogues of N′-(4-tert-butylbenzyl)-N-(4-methylsulfonylaminobenzyl)thiourea as TRPV1 antagonists
摘要:
A series of bicyclic analogues having indan and tetrahydronaphthalene templates in the A-region were designed as conformationally constrained analogues of our previously reported potent TRPV1 antagonists (1, 3). The activities for rat TRPV1 of the conformationally restricted analogues were moderately or markedly diminished, particularly in the case of the tetrahydronaphthalene analogues. The analysis indicated that steric constraints at the benzylic position in the bicyclic analogues may be an important factor for their unfavorable interaction with the receptor. (C) 2008 Elsevier Masson SAS. All rights reserved.