Heterocyclic compounds useful as 5-HT.sub.3 antagonists
申请人:John Wyeth & Brother Limited
公开号:US04983600A1
公开(公告)日:1991-01-08
Aroyl ureas and carbamic acid derivatives of formula A--CO--NHCW--Y--B and pharmaceutically acceptable salts thereof wherein A is a specified aromatic radical including optionally substituted phenyl W is O or S Y is NH or S and B is a specified saturated azacyclic ring, eg tropan-3-yl or quinuclidin-3-yl, possess 5-HT.sub.3 -antagonistic activity and are, for example, useful in treatment of migraine, emesis, anxiety, gastro-intestinal disorders and as anti-psychotics.
Copper(II)-Catalyzed Reactions of α-Keto Thioesters with Azides via C–C and C–S Bond Cleavages: Synthesis of <i>N</i>-Acylureas and Amides
作者:Rajib Maity、Sandip Naskar、Indrajit Das
DOI:10.1021/acs.joc.7b03054
日期:2018.2.16
Cu(II)-catalyzed reaction of α-keto thioesters with trimethylsilyl azide (TMSN3) proceeds with the transformation of the thioester group into urea through C–C and C–S bond cleavages, constituting a practical and straightforward synthesis of N-acylureas. When diphenyl phosphoryl azide (DPPA) is used instead as the azide source in an aqueous environment, primary amides are formed via substitution of