Gold-Catalysis: Highly Efficient and Regio-Selective Carbonyl Migration in Alkynyl-Substituted Indole-3-Carboxamides Leading to Azepino[3,4-b]indol-1-ones
作者:A. Stephen K. Hashmi、Weibo Yang、Frank Rominger
DOI:10.1002/adsc.201200092
日期:2012.5.7
An unprecedented rearrangement/anellation sequence allows the clean synthesis of azepino[3,4‐b]indol‐1‐ones from readily available starting materials. Alkyne‐substituted indole‐3‐carboxamides were prepared and converted to azepino[3,4‐b]indol‐1‐ones by the SPhosAuNTf2 catalyst (SPhos=2‐dicyclohexylphosphino‐2′,6′‐dimethoxybiphenyl). The new connectivity, which involves an unprecedented 3,2‐shift of
前所未有的重排/修饰顺序,可以从容易获得的起始原料中干净合成azepino [3,4- b ]吲哚-1-酮。制备了炔基取代的吲哚-3-羧酰胺,并通过SPhosAuNTf 2催化剂(SPhos = 2-二环己基膦基磷酸2',6'-二甲氧基联苯)转化为azepino [3,4- b ]吲哚-1-酮。晶体结构分析证明了这种新的连接性,其中涉及到空前的酰氨基3,2位移位以形成产物。