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。
Palladium-Catalyzed Domino Carbopalladation/Carbonylative Cyclization: Synthesis of Heterocycles bearing Oxindoles and 3-Acylbenzofuran/3-Acylindole Moieties
A novel and straightforward methodology for palladium-catalyzed carbopalladation-initiated domino carbonylative cyclization to construct bisheterocycles has been established. With TFBen as an efficient and convenient CO source, the protocol is capable of generating oxindole and 3-acylbenzofuran/3-acylindole moieties from the corresponding N-(o-iodoaryl)acrylamides and o-alkynylphenols/o-alkynylanilines
已经建立了一种用于钯催化碳钯化引发的多米诺羰基环化以构建双杂环的新颖且直接的方法。以 TFBen 作为一种高效便捷的 CO 源,该方案能够从相应的N -( o -iodoaryl) 丙烯酰胺和o -炔基酚/ o - 炔基苯胺生成 oxindole 和 3-酰基苯并呋喃/3-acylindole 部分,形成三种一步操作中的 C-C 键和一个 C-O/C-N 键。以中等至优异的产率制备了多种带有羟吲哚和 3-酰基苯并呋喃/3-酰基吲哚的双杂环,具有良好的官能团耐受性。
Palladium-catalyzed domino carbonylative cyclization to access functionalized heterocycles
A novel palladium-catalyzed domino carbonylative cyclization of alkene-tethered indole derivatives with alkyne-tethered nucleophiles has been developed, which provides a straightforward and efficient platform for the rapid construction of functionalized heterocycles. By using benzene-1,3,5-triyl triformate (TFBen) as the CO source, this domino reaction proceeded smoothly with the consecutive formation
已经开发了一种新型的钯催化多米诺羰基环化烯烃束缚的吲哚衍生物与炔烃束缚的亲核试剂,这为快速构建功能化杂环提供了一个简单有效的平台。以苯-1,3,5-三甲酸三酯(TFBen)为CO源,该多米诺反应顺利进行,连续形成三个C C键和一个CX键,得到多种生物学相关的吲哚[2,1 - a ]异喹啉-吲哚和吲哚[2,1 - a ]异喹啉-二氢苯并呋喃衍生物,收率良好。