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。
PIDA-Mediated Oxidative C−C Bond Formation: Novel Synthesis of Indoles from <i>N</i>-Aryl Enamines
作者:Wenquan Yu、Yunfei Du、Kang Zhao
DOI:10.1021/ol900576a
日期:2009.6.4
A variety of functionalized indoles were synthesized from N-arylenaminesvia PIDA-mediated oxidative carbon−carbon bond formation. The features of the present reaction include facilitative preparation of substrates 2, good functional group tolerance, and mild reaction conditions without transition metals.