4-Vinylbenzodioxinones as a new type of precursor for palladium-catalyzed (4+3) cycloaddition of azomethine imines
作者:Yi Tang、Rulei Zhang、Yujie Dong、Songcheng Yu、Yongjun Wu、Yumei Xiao、Hongchao Guo
DOI:10.1039/d3cc06012h
日期:——
In this paper, benzo-fused cyclic carbonates were designed and synthesized as a new type of precursor of π-allylpalladium zwitterionic intermediates, and were applied in Pd-catalyzed diastereo- and enantioselective (4+3) cycloaddition with C,N-cyclic azomethine imines, leading to various biologically important 1,3,4-benzoxadiazepine derivatives in 43–99% yields with 6 : 1 to >20 : 1 dr and up to 95%
本文设计并合成了苯并稠合环状碳酸酯作为π-烯丙基钯两性离子中间体的新型前体,并将其应用于Pd催化的C , N-环状偶氮甲碱的非对映和对映选择性(4+3)环加成反应。亚胺,产生各种具有生物学重要意义的 1,3,4-苯并恶二氮杂卓衍生物,产率 43-99%,dr 为 6:1 至 >20:1,ee 高达 95%。