Synthesis and antihypertensive activity of 3-[(substituted-carbonyl)amino]-2H-1-benzopyrans
作者:Frederick Cassidy、John M. Evans、Michael S. Hadley、Adele H. Haladij、Patricia E. Leach、Geoffrey Stemp
DOI:10.1021/jm00087a018
日期:1992.5
The synthesis and antihypertensive activity of a series of novel 3-[(subtituted-carbonyl)amino]-2H-1-benzopyran-4-ols, administered orally to spontaneously hypertensive rats, are described. Optimum activity in this series was observed for compounds with branched alkyl or branched alkylamino groups flanking the carbonyl or thiocarbonyl group (21, 31-33), which were approximately equipotent to cromakalim. Replacement of the 4-hydroxyl group by hydrogen, methoxy, or amino in this series only led to a slight reduction in potency. These observations are in marked contrast to the structure-activity relationships previously found for the 4-amidobenzopyran-3-ols. The antihypertensive activity of representative compounds 15 and 33 was attenuated by preatreatment with glibenclamide, and thus these compounds may belong to the series of drugs which have been classified as potassium channel activators.
Benzopyran-type compounds
申请人:BEECHAM GROUP PLC
公开号:EP0375449B1
公开(公告)日:1995-02-15
Stereoselective synthesis of protected amines and diamines from alkenes using N,N-Dichloro-t-butylcarbamate
作者:Barry S. Orlek、Geoffrey Stemp
DOI:10.1016/0040-4039(91)80624-f
日期:1991.8
N,N-Dichloro-t-butylcarbamate (1) reacts with alkenes (2) in a regio- and stereo-selective manner to give the trans-chlorocarbamate adducts (3). Treatment of (3) with base gives aziridines (5), and reaction of (3) and (5) with sodium azide leads selectively to the versatilediamine precursors (6) and (7).In situ reduction of (3) with Zn/NH4OAc leads directly to Boc-protected amines (10).