C–N bond formation via Cu-catalyzed cross-coupling with boronic acids leading to methyl carbazole-3-carboxylate: synthesis of carbazole alkaloids
作者:Sk. Rasheed、D. Nageswar Rao、K. Ranjith Reddy、S. Aravinda、Ram A. Vishwakarma、Parthasarathi Das
DOI:10.1039/c3ra44903c
日期:——
Copper promoted N-arylation of methyl 4-amino-3-iodobenzoate with boronic acids followed by Pd-catalyzed intramolecular CâH arylation provides an efficient route to methyl carbazole-3-carboxylate derivatives. This methodology was implemented in the synthesis of naturally occurring carbazole alkaloids clausine C, clausine H, clausine L, clausenalene, glycozoline, glycozolidine, glycozolidal and sansoakamine.
铜促进 4-氨基-3-碘苯甲酸甲酯与硼酸的 N-芳基化反应,然后在 Pd 催化下进行分子内 CâH 芳基化反应,为获得咔唑-3-羧酸甲酯衍生物提供了一条有效途径。在合成天然咔唑生物碱 Clausine C、Clausine H、Clausine L、Clausenalene、glycozoline、glycozolidine、glycozolidal 和 sansoakamine 的过程中采用了这种方法。