Highly enantioselective Michael addition of α,α-disubstituted aldehydes to nitroolefins
作者:Xing-Tao Guo、Feng Sha、Xin-Yan Wu
DOI:10.1007/s11164-016-2468-0
日期:2016.7
A highlyenantioselective Michael addition reaction of α,α-disubstituted aldehydes to β-nitrostyrenes has been developed. In the presence of rosin-based chiral primary amine-thiourea, γ-nitroaldehydes were afforded in excellent enantioselectivities (up to 99 % ee) with up to 99 % yield.
Highly enantioselective Michael addition of isobutyraldehyde to nitroalkenes
作者:Tianxiong He、Qing Gu、Xin-Yan Wu
DOI:10.1016/j.tet.2010.02.069
日期:2010.4
The asymmetric catalytic Michael reaction between isobutyraldehyde and nitroalkanes with chiral primary amine thiourea organocatalysts was described. In the presence of 10 mol % of 1-((1R,2R)-2-amino-1,2-diphenylethyl)-3-benzylthiourea, the desired products were achieved in excellent enantioselectivity (up to>99% ee) with up to 98% yield.