Synthesis and 5-hydroxytryptamine antagonist activity of 2-[[2-(dimethylamino)ethyl]thio]-3-phenylquinoline and its analogs
作者:Thomas P. Blackburn、Barry Cox、Allen J. Guildford、David J. Le Count、Derek N. Middlemiss、Robert J. Pearce、Craig W. Thornber
DOI:10.1021/jm00395a013
日期:1987.12
A series of 2-[(2-aminoethyl)thio]quinolines substituted at the 3-position with alkyl, aryl, or heteroaryl groups has been prepared in the search for novel and selective 5-HT2 antagonists. The affinity of the compounds for 5-HT1 receptor sites was measured by their ability to displace [3H]-5-HT from rat brain synaptosomes whereas the affinity for 5-HT2 receptor sites was measured by their ability to displace [3H]spiperone from synaptosomes prepared from rat brain cortex. The 5-HT2 antagonist properties of the compounds were measured in vivo by their antagonism of 5-hydroxytryptophan-induced head twitches in the mouse and by their antagonism of hyperthermia induced by fenfluramine (N-ethyl-alpha-methyl-m-(trifluoromethyl)phenethylamine hydrochloride) in the rat. The structure-activity relationships in this series are discussed and the properties of 2-[[2-(dimethylamino)ethyl]thio]-3-phenylquinoline hydrochloride (70) are highlighted.
Palladium-catalyzed carbonylation of benzylic ammonium salts to amides and esters <i>via</i> C–N bond activation
作者:Weijie Yu、Shuwu Yang、Fei Xiong、Tianxiang Fan、Yan Feng、Yuanyuan Huang、Junkai Fu、Tao Wang
DOI:10.1039/c8ob00488a
日期:——
An efficient palladium-catalyzed carbonylation reaction of readily available quaternary ammonium salts with CO is reported for the first time to afford arylacetamides and arylacetic acid esters via benzylic C–N bond cleavage. This protocol features mild reaction conditions under atmospheric pressure of CO, a redox-neutral process without an additional oxidant, and a broad substrate scope for various