已经开发了一种方便的 4-(imidazol-1-yl) 吲哚衍生物的一锅法组装,来自易于获得的邻炔基苯胺和咪唑。顺序脱芳构化和 Ag( I ) 催化的环化/Cs 2 CO 3介导的共轭加成/芳构化级联反应表现出高效率和出色的选择性。银 ( I ) 盐和碳酸铯的组合使用对于促进这种多米诺骨牌转换具有重要意义。4-(imidazol-1-yl)indole产物很容易转化为相应的衍生物,在生物化学和医药科学方面具有重要价值。
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.
Stereoselective Synthesis of Acyclic Tetrasubstituted Alkenes from Anilines by Dearomatization and Trimethylenemethane Cycloaddition
作者:Lei Li、Qiuqin He、Renhua Fan
DOI:10.1021/acs.orglett.1c03974
日期:2022.1.14
A method for stereoselective construction of acyclic all-carbon tetrasubstituted alkenes through insertion of nitrile-substituted trimethylenemethane into the aryl C–N bond in anilines via an aromaticity destruction-reconstruction process is reported. The process involves dearomatization, azo-[3 + 2] TMM cycloaddition and aromatization-triggered rearrangement.
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。