An Asymmetric Michael Addition of α,α-Disubstituted Aldehydes to Maleimides Leading to a One-Pot Enantioselective Synthesis of Lactones Catalyzed by Amino Acids
作者:Christoforos G. Kokotos
DOI:10.1021/ol4008662
日期:2013.5.17
A cheap and fast construction of both enantiomers of substituted succinimides is reported. α- or β-amino acids, such as β-phenylalanine and α-tert-butyl aspartate, were found to be efficient organocatalysts for the reaction between α,α-disubstituted aldehydes and maleimides. Products containing contiguous quaternary-tertiary stereogenic centers are obtained in high to quantitative yields and excellent
1,2‐Diamine‐Derived (thio)Phosphoramide Organocatalysts in Asymmetric Michael Additions
作者:Viktória Kozma、Ferenc Fülöp、György Szőllősi
DOI:10.1002/adsc.202000335
日期:2020.6.15
Phosphoramides and thiophosphoramides were prepared from optically pure C2‐symmetric 1,2‐diamines and were used as chiral organocatalysts in the asymmetric Michael additions of aldehydes and ketones to N ‐substituted maleimides. The 1,2‐diphenylethane‐1,2‐diamine derived thiophosphoramide, which could be prepared in good yield in a one‐step procedure, was found to be more active and selective catalyst
Asymmetric Michael addition of aldehydes to maleimides in primary amine-based aqueous ionic liquid-supported recyclable catalytic system
作者:Sergei V. Kochetkov、Alexander S. Kucherenko、Sergei G. Zlotin
DOI:10.1016/j.mencom.2017.09.014
日期:2017.9
A primary amine-based aqueous ionic liquid-supported recyclable catalytic system for asymmetric Michael addition of aldehydes to maleimides has been developed. The best enantioselectivity (up to 84% ee) was attained at the [bmim]BF4/water 2 : 1 (v/v) ratio.