Interruption of Formal Schmidt Rearrangement/Hosomi–Sakurai Reaction of Vinyl Azides with Allyl/Propargylsilanes
作者:Guichun Fang、Zhenhua Liu、Shanshan Cao、Haiyan Yuan、Jingping Zhang、Ling Pan
DOI:10.1021/acs.orglett.8b03062
日期:2018.11.16
An interrupted Schmidt rearrangement/Hosomi–Sakurai reaction of N-tosyl and S-substituted vinyl azides is reported. With BF3·Et2O as a Lewis acid promoter, the denitrogenative fragmentation of vinyl azides facilitates the generation of the N/S-stabilized carbocations, which further undergo nucleophilic addition by allyl/propargylsilanes for C–C bond formation. As a result, a variety of homoallylic/allenylic
据报道,N-甲苯磺酰基和S-取代的乙烯基叠氮化物的施密特重排/ Hosomi-Sakurai反应中断。以BF 3 ·Et 2 O作为路易斯酸助催化剂,乙烯基叠氮化物的脱氮片段化促进了N / S稳定的碳阳离子的生成,该碳阳离子进一步被烯丙基/炔丙基硅烷进行亲核加成以形成C-C键。结果,可以在温和的反应条件下以良好的收率和良好的官能团耐受性提供各种均烯丙基/烯丙基胺。