Divergent Construction of Nitrogen-Containing Polycyclic Compounds with a Dearomatization Strategy
作者:Linfei Wang、Renhua Fan
DOI:10.1021/ol301282p
日期:2012.7.20
The oxidative dearomatization of para-substituted o-alkynylanilines afforded 2-alkynyl cyclohexadienimines, which can act as active substrates for reaction with electron-rich styrenes. The reaction is metal-controlled. Bi(OTf)3-catalyzed reactions afforded 3,4-dihydro-cyclopenta[c,d]indoles, and AgOTf-catalyzed reactions provided tricyclic pyrrole derivatives.
Synthesis of <sup>15</sup>N-labeled heterocycles <i>via</i> the cleavage of C–N bonds of anilines and glycine-<sup>15</sup>N
作者:Jiwen He、Xingguo Zhang、Qiuqin He、Hao Guo、Renhua Fan
DOI:10.1039/d1cc01734a
日期:——
A nitrogen replacement process of anilines by glycine-15N via the cleavage of two C–N bonds for the synthesis of 15N-labeled aromatic heterocycles was reported.
Synthesis of 4-Alkylindoles from 2-Alkynylanilines via Dearomatization- and Aromatization-Triggered Alkyl Migration
作者:Lei Li、Xiaohua Li、Weiyi Wang、Qiuqin He、Renhua Fan
DOI:10.1021/acs.orglett.1c00280
日期:2021.3.19
simple method for rapid synthesis of 4-alkylindoles from 2-alkynylanilines was reported. The protocol involves an oxidative dearomatization and an aromatization triggered regioselective alkylmigration. A range of alkyl groups including linear, branched, or cycloalkyl groups can be introduced into the C4 position of indole.
Aniline Dearomatization and Silver-Catalyzed [3+3] Dipolar Cycloaddition: Efficient Construction of Oxocino[4,3,2-<i>cd</i>]indoles from 2-Alkynylanilines and 2-Alkynylbenzaldoximes
作者:Dandan Han、Qiuqin He、Renhua Fan
DOI:10.1002/anie.201507277
日期:2015.11.16
2‐Alkynylanilines are attractive starting materials in indole synthesis because of their ready availability. Herein, a one‐pot stepwise procedure is reported for efficient construction of multisubstituted oxocino[4,3,2‐cd]indoles from 2‐alkynylanilines and 2‐alkynylbenzaldoximes. The method comprises the oxidative dearomatization of 2‐alkynylanilines, the silver‐catalyzed [3+3] cycloaddition with
2-炔基苯胺由于易于获得,因此在吲哚合成中是有吸引力的起始原料。本文报道了一种单步逐步程序,可从2-炔基苯胺和2-炔基苯并甲醛肟中高效构建多取代的氧代[4,3,2- cd ]吲哚。该方法包括2-炔基苯胺的氧化脱芳香化作用,2-炔基苯甲肟肟的银催化的[3 + 3]环加成反应,以及随后的热自由基骨架重排和芳构化。
Synthesis of C7-Functionalized Indoles through an Aromaticity Destruction–Reconstruction Process
作者:Tingxuan Xu、Qiuqin He、Renhua Fan
DOI:10.1021/acs.orglett.2c00733
日期:2022.4.15
A process for the synthesis of C7-functionalized indoles using para-substituted 2-alkynylanilines as starting materials was reported. The process involves a dearomatization, an 1,2-addition by organic lithium or Grignard reagents, an aromatization-driven allylic rearrangement, and a cyclization. A variety of groups including alkyl, aryl, alkenyl, or alkynyl groups were selectively installed at the