Polycyclic Indoline-Benzodiazepines through Electrophilic Additions of α-Imino Carbenes to Tröger Bases
作者:Alessandro Bosmani、Alejandro Guarnieri-Ibáñez、Sébastien Goudedranche、Céline Besnard、Jérôme Lacour
DOI:10.1002/anie.201803756
日期:2018.6.11
intermolecular reaction of Tröger bases with N‐sulfonyl‐1,2,3‐triazoles. Under RhII catalysis, α‐imino carbenes are generated and a subsequent cascade of [1,2]‐Stevens, Friedel–Crafts, Grob, and aminal formation reactions yield the polycyclic heterocycles as single isomers (d.r.>49:1, four stereocenters including two bridgehead N atoms). Further ring expansion by insertion of a second α‐imino carbene leads
可通过Tröger碱与N-磺酰基-1,2,3-三唑的分子间反应获得多环吲哚啉-苯并二氮杂pine 。在Rh II催化下,生成α-亚氨基卡宾,随后的[1,2] -Stevens,Friedel-Crafts,Grob和氨基形成反应的级联反应生成多环杂环,为单个异构体(dr> 49:1,四个立体中心)包括两个桥头N原子)。通过插入第二个α-亚氨基卡宾进一步的环扩展导致精心设计的多环9元环三唑烷。