Direct Alkenylation of 2‐Methylquinolines with Aldehydes through Synergistic Catalysis of 1,3‐Dimethylbarbituric Acid and HOAc
作者:En Liang、Junqi Wang、Yinrong Wu、Liangbin Huang、Xingang Yao、Xiaodong Tang
DOI:10.1002/adsc.201900351
日期:2019.8.5
aldehydes has been achieved through a novel synergistic organocatalysis. The HOAc‐ activated 2‐methylquiolines undergo a Michael addition to 1,3‐dimethylbarbituric acid‐activated aldehydes, followed by a retro‐Michael addition to release 1,3‐dimethylbarbituric acid and the target products. The transformation produced various 2‐alkenylquinolines with good to excellent yields and featured mild reaction conditions
通过新型的协同有机催化,已经实现了2-甲基喹啉与醛的有效,实用的直接烯基化反应。HOAc活化的2-甲基喹啉在1,3-二甲基巴比妥酸活化的醛中进行迈克尔加成反应,然后在Michael逆向加成反应中释放1,3-二甲基巴比妥酸和目标产物。该转化产生了各种2-烯基喹啉,具有良好或优异的收率,并且具有温和的反应条件,原子和阶梯经济,良好的官能团耐受性和操作简便性。