Mn(III)-Mediated Radical Cyclization of <i>o</i>-Alkenyl Aromatic Isocyanides with Boronic Acids: Access to N-Unprotected 2-Aryl-3-cyanoindoles
作者:Lu Liu、Lei Li、Xin Wang、Ran Sun、Ming-Dong Zhou、He Wang
DOI:10.1021/acs.orglett.1c01979
日期:2021.8.6
The synthesis of N-unprotected 2-aryl-3-cyanoindoles was realized via the Mn(III)-mediated radical cascade cyclization of o-alkenyl aromatic isocyanides with boronic acids. A possible mechanism involving a sequential intermolecular radical addition, intramolecular cyclization, and cleavage of the C–C bond under mild reaction conditions is proposed. Mechanism studies show that H2O or O2 might provide
N-未保护的 2-芳基-3-氰基吲哚的合成是通过 Mn(III) 介导的邻烯基芳族异氰化物与硼酸的自由基级联环化来实现的。提出了一种可能的机制,包括在温和的反应条件下连续分子间自由基加成、分子内环化和 C-C 键断裂。机理研究表明,H 2 O 或O 2可能为消除苯甲醛提供氧源。
Synthesis of pyrazolo[1,5-<i>c</i>]quinazoline derivatives through the copper-catalyzed domino reaction of <i>o</i>-alkenyl aromatic isocyanides with diazo compounds
作者:Lu Liu、Lei Li、Shukuan Mao、Xin Wang、Ming-Dong Zhou、Yu-long Zhao、He Wang
DOI:10.1039/d0cc00594k
日期:——
A novel copper-catalyzed domino reaction between o-alkenyl aromatic isocyanides and diazocompounds has been developed under mild reaction conditions. Various o-alkenyl aromatic isocyanides were prepared from readily available reactants. The reaction provides a general and efficient method for the synthesis of pyrazolo[1,5-c]quinazolines by the formation of two rings and three new bonds in a single
在温和的反应条件下,开发了一种新型的铜催化的邻链烯基芳族异氰酸酯与重氮化合物之间的多米诺反应。由容易获得的反应物制备各种邻烯基芳族异氰酸酯。该反应提供了一种通用且有效的方法,该方法通过从容易获得的无环原料中一步形成两个环和三个新键来合成吡唑并[1,5- c ]喹唑啉。提出了一种机制,涉及串联(3 + 2)环化/消除/分子内氮杂加成序列。
Trifluoromethylation/Difluoromethylation‐Initiated Radical Cyclization of
<i>o</i>
‐Alkenyl Aromatic Isocyanides for Direct Construction of 4‐Cyano‐2‐Trifluoromethyl/Difluoromethyl‐Containing Quinolines
作者:Shukuan Mao、He Wang、Lu Liu、Xin Wang、Ming‐Dong Zhou、Lei Li
DOI:10.1002/adsc.202000155
日期:2020.5.26
In this study, a radical‐triggered cyclization of o ‐alkenylaromaticisocyanides prepared from accessible starting materials is developed. The reaction provides a general and efficient method for the synthesis of 4‐CN‐2‐CF3/CF2H‐containingquinolines under copper or visible‐light photoredox catalysis in a one‐pot synthetic procedure. This protocol demonstrates good to high yields, broad substrate
[EN] Α-CARBOLINE COMPOUND , PREPARATION METHOD THEREFOR AND USES THEREOF<br/>[FR] COMPOSÉ D'A-CARBOLINE, PROCÉDÉ DE PRÉPARATION CORRESPONDANT ET SES UTILISATIONS<br/>[ZH] α-咔啉类化合物,其制备方法以及用途