Solid-phase synthesis of 4-methylene pyrrolidines and allylic amines using palladium-activated allylic linkers
作者:Richard C. D. Brown、Martyn L. Fisher、Lynda J. Brown
DOI:10.1039/b303752e
日期:——
transformations included a Lewis-acid promoted imino-Sakurai type reaction and reductive alkylation prior to the final palladium-catalysed cyclisation cleavage of the allylic carboxylate linkage. Allylic carboxylate resin 22 was also shown to undergo "traceless" cleavage using various hydride sources in the presence of catalytic palladium. A more robust allylic ether linkage was also investigated. Starting
使用钯催化的烯丙基键的亲核裂解,可以实现4-亚甲基吡咯烷和烯丙基胺的固相合成。在五个步骤中,从羧乙基树脂20合成了六个吡咯烷,其中关键的转化包括路易斯酸促进的亚氨基-樱井型反应和还原性烷基化,然后进行最终的钯催化的烯丙基羧酸酯键的环化裂解。还显示烯丙基羧酸酯树脂22在催化钯存在下使用各种氢化物源进行“无痕”裂解。还研究了更坚固的烯丙基醚键。从酚醛树脂36开始,使用钯催化的亲核裂解反应制备了许多3-芳基-烯丙胺。