Chemo- and Regioselective Asymmetric Friedel–Crafts Reaction of Furans and Thiophenes with α,β-Unsaturated Aldehydes through Dual Activation
作者:Xiao-Ru Zhang、Su-Lan Zhou、Yi Yuan、Wei Du、Ying-Chun Chen
DOI:10.1055/s-0036-1588831
日期:2017.9
A highly chemo- and regioselective Friedel–Crafts alkylation reaction of furans and thiophenes has been developed, which relies on the activation from the remote conjugated Mukaiyama silyl enol ether motif. Excellent enantioslectivity is generally obtained in reactions with α,β-unsaturated aldehydes under the well-established iminium ion catalysis of a chiral secondary amine.
已经开发了一种高度化学和区域选择性的呋喃和噻吩的 Friedel-Crafts 烷基化反应,该反应依赖于远程共轭 Mukaiyama 甲硅烷基烯醇醚基序的活化。在公认的手性仲胺亚胺离子催化下,与 α,β-不饱和醛反应通常可以获得优异的对映选择性。