Cp*Co(III)-Catalyzed γ-Selective C–H Allylation/Hydroamination Cascade for the Synthesis of Dihydroisoquinolines
作者:Suh Young Choi、Hyeon Dae Kim、Jong-Un Park、Sun-a Park、Ju Hyun Kim
DOI:10.1021/acs.orglett.9b03977
日期:2019.12.20
A Cp*Co(III)-catalyzed γ-selective C-H allylation/hydroamination cascade toward the synthesis of 3,4-dihydroisoquinolines (DHIQs) has been successfully developed, starting from NH ketimines and allyl carbonates. Notably, highly efficient and γ-selective C-H allylations were accomplished using γ-substituted allyl reagents, thus overcoming the issues of poor α/γ selectivity and low reactivity of previous
从NH酮亚胺和碳酸烯丙酯开始,已经成功地开发了一种Cp * Co(III)催化的γ-选择性CH烯丙基化/加氢胺化级联反应,用于合成3,4-二氢异喹啉(DHIQs)。值得注意的是,使用γ-取代的烯丙基试剂可实现高效且具有选择性的CH烯丙基化,从而克服了先前过渡金属催化的CH烯丙基化的较差的α/γ选择性和低反应性的问题。碳酸烯丙酯的立体化学是关键因素,并且使用(Z)-烯丙基碳酸酯实现DHIQ的合成。