Enantioselective Allylic Alkylation with 4-Alkyl-1,4-dihydro-pyridines Enabled by Photoredox/Palladium Cocatalysis
作者:Hong-Hao Zhang、Jia-Jia Zhao、Shouyun Yu
DOI:10.1021/jacs.8b10766
日期:2018.12.12
alkylation has been achieved enabled by the merger of photoredox and palladium catalysis. In this dual catalytic process, alkyl radicals generated from 4-alkyl-1,4-dihydropyridines act as the coupling partners of the π-allyl palladium complexes. The generality of this method has been illustrated through the reaction of a variety of allyl esters with 4-alkyl-1,4-dihydropyridines. This mechanistically novel
通过光氧化还原和钯催化的合并,实现了高度区域和对映选择性的烯丙基烷基化。在这种双重催化过程中,由 4-烷基-1,4-二氢吡啶生成的烷基自由基作为 π-烯丙基钯配合物的偶联伙伴。该方法的通用性已通过各种烯丙基酯与 4-烷基-1,4-二氢吡啶的反应得到说明。这种机械上新颖的策略扩展了传统 Pd 催化的不对称烯丙基烷基化反应的范围,并作为其替代和潜在的补充。