Facile Synthesis of Fully Substituted Dihydro-β-carbolines via Brønsted Acid Promoted Cascade Reactions of α-Indolyl Propargylic Alcohols with Nitrones
作者:Lu Wang、Xin Xie、Yuanhong Liu
DOI:10.1021/ol302695p
日期:2012.12.7
Brønsted acid promoted cyclizations of α-indolyl propargylic alcohols with nitrones is described. The use of nitrones bearing alkenyl or electron-rich aryl groups as the R4 substituent dramatically switches the reaction pathway to afford tetrasubstituted alkenes and amines, which is assumed to proceed through a rearrangement reaction involving N–O bond cleavage and 1,2-migration of the R4 group to an adjacent
描述了通过布朗斯台德酸促进的α-吲哚基炔丙基醇与硝酮的环化反应,直接合成完全取代的β-咔啉。使用带有烯基或富电子芳基的硝基作为R 4取代基,可以显着改变反应途径,从而得到四取代的烯烃和胺,据推测该过程将通过涉及N–O键断裂和1,2-迁移的重排反应进行R 4基团的一个与相邻的氮原子相连。