Synthesis of polycyclic spiroindolines <i>via</i> the cascade reaction of 3-(2-isocyanoethyl)indoles
作者:Haizhen Li、Jinyu Wu、Jianfeng Zheng、Wei-Dong Z. Li
DOI:10.1039/d1cc04576h
日期:——
Tandem reactions of the yttrium(iii) catalyzed ring-opening reaction of 2,2′-diester aziridines with 3-(2-isocyanoethyl)indoles and the subsequent Friedel–Crafts/Mannich/desulfonylation were reported. A series of polycyclic spiroindolines containing tetrahydro-β-carbolines were obtained in moderate to excellent yields (56–92%) in one step under mild reaction conditions. A possible catalytic mechanism
报道了钇 ( iii ) 催化 2,2'-二酯氮丙啶与 3-(2-异氰乙基) 吲哚的开环反应和随后的 Friedel-Crafts/Mannich/脱磺酰化反应的串联反应。在温和的反应条件下,一步获得了一系列含有四氢-β-咔啉的多环螺二氢吲哚,收率中等至极好(56-92%)。还提出了可能的催化机制。