Reactions between 1-dimethylamino-1-azadienes and several quinones in the presence of a chloroformyl polystyrene resin proceeded with up to 2.5-fold increase in the isolated yields of the hetero Diels-Alder products, owing to efficient scavenging of dimethylamine liberated from the primary cycloadducts.
1-
二甲氨基-1-氮杂二烯和几种醌在
氯甲酰聚
苯乙烯树脂存在下进行反应,由于有效清除了从
伯胺中释放出的
二甲胺,杂狄尔斯-阿尔德产物的分离收率增加了 2.5 倍。环加合物。