Chiral Phosphine-Catalyzed Enantioselective Construction of γ-Butenolides Through Substitution of Morita−Baylis−Hillman Acetates with 2-Trimethylsilyloxy Furan
作者:Ying-Qing Jiang、Yong-Ling Shi、Min Shi
DOI:10.1021/ja802422d
日期:2008.6.1
Chiral multifunctional phosphine (R)-N-(2'-diphenylphosphanyl-[1,1']binaphthalenyl-2-yl)methanesulfonamide L2 or (R)-N-(2'-diphenylphosphanyl-[1,1']binaphthalenyl-2-yl)acetamide L3 is an efficient catalyst in the allylic substitutions of MBH acetates 1 with 2-trimethylsilyloxy furan 2 to provide gamma-butenolides 3 in good to excellent yields and enantiomeric excesses in the presence of water.
Chiral Bifunctional Thiourea-Phosphane Organocatalysts in Asymmetric Allylic Amination of Morita-Baylis-Hillman Acetates
作者:Hong-Ping Deng、Yin Wei、Min Shi
DOI:10.1002/ejoc.201001660
日期:2011.4
A series of new chiralbifunctionalthiourea-phosphane catalysts was synthesized and successfully applied in the catalytic, asymmetricallylicamination of Morita-Baylis-Hillman (MBH) acetates derived from the methyl vinyl ketone (MVK) or ethyl vinyl ketone (EVK) system, with phthalimide, affording the amination products in up to over 99 % yield and 90 % ee for a wide range of substrates derived from