Catalytic Asymmetric Synthesis of α,β-Disubstituted α,γ-Diaminophosphonic Acid Precursors by Michael Addition of α-Substituted Nitrophosphonates to Nitroolefins
作者:Chandra Bhushan Tripathi、Satavisha Kayal、Santanu Mukherjee
DOI:10.1021/ol3012666
日期:2012.7.6
various nitroolefins are shown to proceed with high diastereo- and enantioselectivity when catalyzed by a quinine-derived thiourea-tertiary amine bifunctional catalyst and generate α,γ-diaminophosphonic acid precursors with contiguous quaternary and tertiary stereocenters.
当由奎宁衍生的硫脲-叔胺双官能催化剂催化并生成具有连续的季和叔立体中心的α,γ-二氨基膦酸前体时,显示出将α-取代的硝基膦酸酯迈克尔加成到各种硝基烯烃上具有高的非对映选择性和对映选择性。