Highly Enantioselective Michael Addition of Malonates to β-CF<sub>3</sub>-β-(3-Indolyl)nitroalkenes: Construction of Trifluoromethylated All-Carbon Quaternary Stereogenic Centres
作者:Chun-Hui Ma、Tai-Ran Kang、Long He、Quan-Zhong Liu
DOI:10.1002/ejoc.201402243
日期:2014.7
thioureas catalysed the conjugateaddition of malonates to nitroalkenes containing a trifluoromethyl and indole motif at the β-position to afford the corresponding γ-nitrobutyric acid esters in good yields (up to 89 % yield) and with good to excellent enantioselectivities (up to 90 % ee). This protocol provides an efficientaccess to optically enriched γ-amino acids and β-disubstituted γ-butyrolactams.