Chroman and tetrahydroquinoline ureas as potent TRPV1 antagonists
摘要:
Novel chroman and tetrahydroquinoline ureas were synthesized and evaluated for their activity as TRPV1 antagonists. It was found that aryl substituents on the 7- or 8-position of both bicyclic scaffolds imparted the best in vitro potency at TRPV1. The most potent chroman ureas were assessed in chronic and acute pain models, and compounds with the ability to cross the blood-brain barrier were shown to be highly efficacious. The tetrahydroquinoline ureas were found to be potent CYP3A4 inhibitors, but replacement of bulky substituents at the nitrogen atom of the tetrahydroisoquinoline moiety with small groups such as methyl can minimize the inhibition. (C) 2011 Elsevier Ltd. All rights reserved.
Formation of Acridones by Ethylene Extrusion in the Reaction of Arynes with β-Lactams and Dihydroquinolinones
摘要:
N-Unsubstituted beta-lactams react with a molecule of aryne by insertion into the amide bond to form a 2,3-dihydroquinolin-4-one, which subsequently reacts with another molecule of aryne to form an acridone by extrusion of a molecule of ethylene. 2,3-Dihydroquinolin-4-ones react under the same reaction conditions to afford identical results. This is the first example of ethylene extrusion in aryne chemistry.
A Facile and Expeditious Synthesis of Cryptosanguinolentines
作者:Dalip Kumar、Maruthi Kumar. N.、V. S. Rao
DOI:10.1246/cl.2009.156
日期:2009.2.5
A simple and efficient synthesis of naturally occurring cryptosanguinolentines is described. Neat reaction of easily accessible 1-methyl-1,2,3,4-tetrahydroquinolin-4-ones and aryl hydrazines in the presence of p-toluenesulfonic acid at 100 °C rapidly afforded cryptosanguinolentines in very good yields.