A Concise Synthesis of Pyrrolo- and Pyrrolidino[1,2-<i>a</i>]quinolin-1-ones via Diels-Alder Reactions of <i>N</i>-Acyliminium Cations with Olefins
作者:Wei Zhang、Limin Huang、Junpu Wang
DOI:10.1055/s-2006-942372
日期:2006.6
A concise and efficient synthesis of pyrrolo- and pyrrolidino[1,2-a]quinolin-1-ones has been developed. New members of this family can thus be generated via Diels-Alder reactions of olefins with N-acyliminium cations produced, in the presence of BF3·Et2O, from 5-hydroxy-1-arylpyrrol-2-ones and 5-hydroxy-1-arylpyrrolidin-2-ones in moderate to high yields at ambient temperature.
一种简洁高效的吡咯并[1,2-a]喹啉-1-酮和吡咯烷并[1,2-a]喹啉-1-酮合成方法已被开发出来。通过Diels-Alder反应,在BF3·Et2O存在下,由5-羟基-1-芳基吡咯-2-酮和5-羟基-1-芳基吡咯烷-2-酮产生N-酰基亚胺正离子与烯烃反应,可在室温下以中等至高产率生成这一家族的新成员。