Brønsted Base-Catalyzed Transformation of α,β-Epoxyketones Utilizing [1,2]-Phospha-Brook Rearrangement for the Synthesis of Allylic Alcohols Having a Tetrasubstituted Alkene Moiety
作者:Azusa Kondoh、Naoko Tasato、Takuma Aoki、Masahiro Terada
DOI:10.1021/acs.orglett.0c01765
日期:2020.7.2
stereoselective transformation of α,β-epoxyketones into alkenylphosphates having a hydroxymethyl group on the β-carbon was established by utilizing the [1,2]-phospha-Brook rearrangement under Brønsted base catalysis. The reaction involves the catalytic generation of an α-oxygenated carbanion located at the α-position of an epoxide moiety through the [1,2]-phospha-Brook rearrangement and the following
通过在布朗斯台德碱催化下利用[1,2]-磷-布鲁克重排,将α,β-环氧酮立体选择性转化为在β-碳上具有羟甲基的烯基磷酸酯。该反应包括通过[1,2]-磷-布鲁克重排和随后的环氧化物开环催化生成位于环氧化物部分的α-位的α-氧化的碳负离子。通过与格氏试剂的钯催化的交叉偶联反应进一步转化烯基磷酸酯,提供了具有立体定义的全碳四取代烯烃部分的烯丙基醇。