Divergent C-H Annulation for Multifused N-Heterocycles: Regio- and Stereospecific Cyclizations of N-Alkynylindoles
作者:Khyarul Alam、Sung Won Hong、Kyung Hwan Oh、Jin Kyoon Park
DOI:10.1002/anie.201705514
日期:2017.10.16
N‐Alkynylindoles were divergently cyclized for the synthesis of multifused N‐heterocycles. An ortho‐aryl palladium species was added to the α position of an ynamine to generate (Z)‐6‐alkylidene/benzylidene‐6H‐isoindolo[2,1‐a]indoles, while Pt‐catalyzed β‐addition through π‐activation gave 5‐alkyl/arylindolo[2,1‐a]isoquinolines. Double cyclizations using PdCl2 and oxidant afforded bright yellow benzo[7
N-炔炔醇被发散地环化以合成多融合的N-杂环。一个邻位的芳基钯物种加入到一个ynamine的α位,以产生(ż)-6-亚烷基/亚苄基-6- ħ -isoindolo [2,1-一个]吲哚,而铂催化的β加成通过π-活化得到5-烷基/芳基吲哚并[2,1- a ]异喹啉。使用PdCl 2和氧化剂进行双环化可得到亮黄色的苯并[7,8]吲哚并ino [2,3,4,5- ija ]喹啉,其合成也通过不同的合成路线得到证明。