Stereoselective Formation of (E)-β-Alkoxy Acrylates from Fischer Carbene Complexes and Chelated Amino Acid Ester Enolates
作者:Uli Kazmaier、Rupsha Chaudhuri
DOI:10.1055/s-0033-1340496
日期:——
Chelated amino acid ester enolates react with alkyl Fischer carbene complexes via nucleophilic attack on the electrophilic carbene center. Subsequent elimination of the metal fragment and trifluoroacetamide results in the formation of β-alkoxy-α,β-unsaturated esters in a highly E -stereoselective fashion.
螯合氨基酸酯烯醇化物通过对亲电卡宾中心的亲核攻击与烷基 Fischer 卡宾配合物反应。随后金属片段和三氟乙酰胺的消除导致β-烷氧基-α,β-不饱和酯以高度E-立体选择性的方式形成。