FeCl 3 ·6H 2 O-catalyzed selective conjugate reduction of alkylidene- β -keto esters and alkylidene-1,3-diketones
作者:Lakshmi V.R. Babu Syamala、Trimbak B. Mete、Ramakrishna G. Bhat
DOI:10.1016/j.tetlet.2018.07.041
日期:2018.8
system is successfully developed for the selective conjugate reduction of carbon-carbon double bond of Michael acceptor-alkylidene-β-keto esters and alkylidene-1,3-diketones under mild reaction conditions to afford the corresponding saturated β-keto esters and 1,3-diketones. The process involves the iron-catalyzed hydrosilylation, followed by in situ hydrolysis of silyl enol ether. The optimal reaction
成功开发了FeCl 3 ·6H 2 O /三乙基硅烷复合催化剂体系,用于在温和的反应条件下选择性共轭还原迈克尔受体-亚烷基-β-酮酯和亚烷基-1,3-二酮的碳-碳双键,从而得到相应的饱和β-酮酯和1,3-二酮。该方法涉及铁催化的氢化硅烷化,然后原位水解甲硅烷基烯醇醚。最佳反应条件包括20 mol%的FeCl 3 ·6H 2室温下在二氯甲烷中加入O和三乙基硅烷。各种各样的底物以1、4选择性的方式还原,从而以极好的收率得到相应的饱和化合物。
Polyazaheterocycle compounds
申请人:Yoshitomi Pharmaceutical Industries, Ltd.
公开号:US04918074A1
公开(公告)日:1990-04-17
A polyazaheterocycle compound of the formula: ##STR1## or a pharmaceutically acceptable salt thereof, wherein each symbol is as defined in the specification. Said compounds exhibit calcium antagonistic and/or calcium agonistic activities.