Palladium(II)-Catalyzed Oxidative Decarboxylative [2 + 2 + 1] Annulation of Cinnamic Acids with Alkynes: Access to Polysubstituted Pentafulvenes
作者:Shiyong Peng、Nuan Chen、Hong Zhang、Min He、Hongguang Li、Ming Lang、Jian Wang
DOI:10.1021/acs.orglett.0c01955
日期:2020.7.17
An unprecedented palladium(II)-catalyzed oxidative decarboxylative [2 + 2 + 1] annulation of cinnamic acids with alkynes has been developed for the synthesis of polysubstituted pentafulvenes. Ag2CO3 and DMSO are essential for the reaction. This protocol features readily available starting materials, a wide substrate scope, and moderate to excellent yields. Moreover, various significant frameworks can
已开发出前所未有的钯(II)催化的肉桂酸与炔烃的氧化脱羧[2 + 2 +1]环合反应,用于合成多取代的五烯酮。Ag 2 CO 3和DMSO对反应至关重要。该协议的特点是容易获得的起始原料,广泛的底物范围以及中等至极好的产率。而且,可以通过氧化,还原和Scholl型反应从五烯丙基戊烯的后期转化中容易地获得各种重要的构架。
CINNAMIC ACID ASCORBATES
申请人:Rudolph Thomas
公开号:US20120052028A1
公开(公告)日:2012-03-01
The invention relates to specific cinnamic acid ascorbates and to the use thereof as UV filters which bond to the skin, and to a process for the preparation thereof, and to preparations comprising these compounds.