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。
Dearomatization Strategy and Palladium-Catalyzed Domino Reaction: Construction of Azepino[5,4,3-<i>cd</i>]indoles from 2-Alkynylanilines
作者:Chen Zheng、Jin Jin Chen、Renhua Fan
DOI:10.1021/ol403557q
日期:2014.2.7
A facile approach to construct 3,4-fused tricyclic azepino[5,4,3-cd]indoles from 2-alkynyl anilines, isocyanides, and α,β-unsaturated acids is reported. This synthetic process involves a regioselective meta-functionalization of 2-alkynylanilines using a dearomatization strategy and a palladium(II)-catalyzed domino heterocyclization/Heck reaction.
报道了一种由2-炔基苯胺,异氰酸酯和α,β-不饱和酸构建3,4-稠合三环叠氮基[5,4,3- cd ]吲哚的简便方法。该合成过程涉及使用脱芳香化策略和钯(II)催化的多米诺杂环/ Heck反应对2-炔基苯胺进行区域选择性的亚功能化。
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 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.
1,2- and 1,4-Additions of 2-Alkynylcyclohexadienimines with Aromatic Amines To Access 4-Amino-<i>N</i>-arylindoles and -azepinoindoles
作者:Li Zhang、Zhiming Li、Renhua Fan
DOI:10.1021/ol3029675
日期:2012.12.7
2-Alkynylcyclohexadienimines, derived from the oxidation of 2-alkynylanilines, react with aromatic amines leading to N-arylindoles with a 4-amino substitution. The reaction was metal-controlled, and Bi(OTf)(3) proved to be the best catalyst. The resulting 4-amino N-arylindoles could be converted to azepino[4,3,2-cd]indoles through condensation with aldehydes.
One-Pot Synthesis of Highly Substituted 4-Acetonylindoles via Sequential Dearomatization and Silver-Catalyzed Domino Reaction
作者:Xin Feng、Huiqing Wang、Bo Yang、Renhua Fan
DOI:10.1021/ol501678v
日期:2014.7.3
Synthetically useful 4-acetonylindoles have been conveniently prepared from 2-alkynylanilines and silyl enol ethers using a dearomatization strategy. The two-step/one-pot protocol involves an iodosylbenzene-mediated oxidative dearomatization and a silver-catalyzed domino reaction.