Expedient entry to the piperazinohydroisoquinoline ring system using a sequential Ugi/Pictet–Spengler/reductive methylation reaction protocol
作者:Ma.-Angeles Cano-Herrera、Luis D. Miranda
DOI:10.1039/c1cc10759c
日期:——
An expedient entry to the piperazinohydroisoquinoline ring system present in the tetrahydroisoquinoline antitumor alkaloids family is described. The synthetic sequence involves: a sequential Ugi reaction followed by an N-Boc-deprotection process and iminium formation with a spontaneous PictetâSpengler cyclization and reductive N-methylation, with all these processes performed in a two-operation protocol in the same reaction flask.
描述了一种便捷的方法用于合成四氢异喹啉抗肿瘤生物碱系列中存在的哌嗪氢异喹啉环系统。合成过程包括:依次进行Ugi反应,随后进行N-Boc去保护过程和亚胺形成,伴随自发的Pictet–Spengler环化和还原性N甲基化,所有这些过程均在同一个反应烧瓶中以两步操作协议完成。