据报道,通过Pd催化的串联烯丙基烷基化和脱芳香化反应可有效合成含氮杂环。在该反应设计中,杂芳烃如吡啶,吡嗪和喹啉通过在C2苄基位置安装苯甲酰基而用作双亲核试剂。以二碳酸二烯丁酯-1,4-二烷基二芳酯为双亲电子体,已开发了串联的钯催化苯甲酰基甲基取代的杂芳烃的分子间烯丙基烷基化/烯丙基脱芳香化反应。以中等至良好的产率获得了2,3-二氢吲哚嗪,6,7-二氢吡咯并[1,2- a ]吡嗪和1,2-二氢吡咯并[1,2- a ]喹啉衍生物。
Copper-Catalyzed Bisannulations of Malonate-Tethered <i>O</i>-Acyl Oximes with Pyridine, Pyrazine, Pyridazine, and Quinoline Derivatives for the Construction of Dihydroindolizine-Fused Pyrrolidinones and Analogues
作者:Chun-Bao Miao、Hong-Rong Guan、YiHan Tang、Kun Wang、Wen-Long Ren、Xinyu Lyu、ChangSheng Yao、Hai-Tao Yang
DOI:10.1021/acs.orglett.1c03078
日期:2021.11.19
A copper-catalyzed bisannulation reaction of malonate-tethered O-acyl oximes with pyridine, pyrazine, pyridazine, and quinoline derivatives has been developed for the concise synthesis of structurally novel dihydroindolizine-fused pyrrolidinones and their analogues. The present reaction shows excellent regioselectivity and stereoselectivity. Theoretical calculations reveal that the coordination effect