Dinuclear Zinc-Catalyzed Asymmetric Tandem Reaction of α-Hydroxy-1-indanone: Access to Spiro[1-indanone-5,2′-γ-butyrolactones]
作者:Meng-Meng Liu、Xiao-Chao Yang、Yuan-Zhao Hua、Jun-Biao Chang、Min-Can Wang
DOI:10.1021/acs.orglett.9b02658
日期:2019.9.6
A highly efficient method for the enantioselective build of spiro[1-indanone-5,2'-γ-butyrolactones] has been developed through the tandem Michael/transesterificationreaction of α-hydroxy-1-indanone and α,β-unsaturated esters. A broad range of spiro(1-indanone-butyrolacones) with contiguous stereocenters have been synthesized with excellent stereoselectivities (up to >20:1 dr, up to >99% ee) under
Catalytic C–H α-Trifluoromethylation of α,β-Unsaturated Carbonyl Compounds
作者:Zhongxue Fang、Yongquan Ning、Pengbing Mi、Peiqiu Liao、Xihe Bi
DOI:10.1021/ol5004498
日期:2014.3.7
A copper(I)-catalyzed, regioselective C-H alpha-trifluoromethylation of alpha,beta-unsaturated carbonyl compounds using Togni's reagent was developed. Diverse substrates, including enones as well as alpha,beta-unsaturated esters, thioesters, and amides, stereospecifically afforded the corresponding (E)-alpha-trifluoromethylated products in moderate to high yields. Further, this method was applied to the C-H trifluoromethylation of drugs.