Organocatalytic enantioselective Michael addition of β-diketones to β-nitrostyrene: the first Michael addition of dipivaloylmethane to an activated olefin.
作者:Declan P. Gavin、John C. Stephens
DOI:10.3998/ark.5550190.0012.930
日期:——
The addition of a family of β-diketones to β-nitrostyrene was explored using a library of cinchona organocatalysts. A thiourea organocatalyst, under improved reaction conditions, is shown to be much more efficient at catalyzing this reaction than previously reported giving excellent yields and enantioselectivites (up to 95% yield and 97% ee). The same thiourea organocatalyst was employed in the first
Graphene oxide as a recyclable phase transfer catalyst
作者:Youngmin Kim、Surajit Some、Hyoyoung Lee
DOI:10.1039/c3cc42787k
日期:——
We demonstrated a simple and green chemical method to obtain Michael adducts and their derivatives by using GO as a phase transfer catalyst with different kinds of bases in water and dichloromethane, and we also used GO multiple cycles almost without reduction in reaction yields.
CATALYST FOR ORGANIC REACTION AND METHOD OF USE THEREOF
申请人:RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
公开号:US20150119583A1
公开(公告)日:2015-04-30
A catalyst for an organic reaction and a method of using a catalyst in an organic reaction are provided. The catalyst for an addition or condensation reaction includes a graphene oxide including an oxygen functional group, and the catalyst is configured to promote the addition or condensation reaction by bonding the oxygen functional group with an alkali metal ion or alkali earth metal ion during the addition or condensation reaction.
Well-defined chiral Ru amido complexes promoted asymmetric Michael addition of 1,3-dicarbonylcompounds including malonates, beta-keto esters, and 1,3-diketones to nitroalkenes to give the corresponding adducts with excellent ees and in excellent yields.
明确定义的手性 Ru 酰胺配合物促进 1,3-二羰基化合物(包括丙二酸酯、β-酮酯和 1,3-二酮)与硝基烯烃的不对称迈克尔加成反应,得到相应的加合物,具有优异的 ees 和优异的产率。