β-unsaturated ketones could be obtained by palladium-catalyzed ring-opening of mono-substituted cyclopropyl ketones efficiently and systematically. (E)-1-Arylbut-2-en-1-ones were generated from aryl cyclopropyl ketones stereoselectively in yields of 23–89% by the Pd(OAc)2/PCy3 catalytic system. The reaction exhibited stereoselectivity (only E products were found) and was suitable for both phenyl and
在此,我们报道通过钯催化的单取代环丙基酮的开环可以有效且系统地获得α,β-不饱和酮。( E )-1-Arylbut-2-en-1-ones 通过 Pd(OAc) 2 /PCy 3催化体系由芳基环丙基酮立体选择性生成,收率为 23-89% 。该反应表现出立体选择性(仅发现E产物)并且适用于苯基和杂芳基环丙基酮。
Decarboxylative allylation of arylglyoxylic acids with allyl alcohol
作者:Matthias F. Grünberg、Lukas J. Gooßen
DOI:10.1016/j.jorganchem.2013.06.004
日期:2013.11
A decarboxylative allylation of arylglyoxylic acids with allyl alcohol has been developed. In the presence of catalytic amounts of Pd(dba)(2) and PPh3, the substrates are in an esterification equilibrium with the allyl arylglyoxylates, which are continuously decarboxylated to give alpha,beta-unsaturated ketones along with CO2 and water as the only byproducts. (C) 2013 Elsevier B.V. All rights reserved.