作者:Yuelian Xu、William R Dolbier
DOI:10.1016/s0040-4020(98)00329-9
日期:1998.6
Synthetic utility of the novel difluoro ketene aminal 1 was extended to the preparation of a number of potentially biologically-interesting difluoro barbituric acid derivatives via initial hetero-Diels-Alder reactions of 1 with p-substituted-5-benzylidene-1,3-dimethylbarbituric acids 3. These cycloadducts 4 upon hydrolysis, provided the formal Michael addition product amides 5 which were readily converted to
新型二氟乙烯酮缩醛胺1的合成用途扩展到了通过1与对位5-亚苄基-1,3-二甲基巴比妥酸进行的初始杂狄尔斯-阿尔德反应制备许多潜在的具有生物学意义的二氟巴比妥酸衍生物的方法。酸3。这些环加合物4在水解时提供了形式的迈克尔加成产物酰胺5,其易于转化为相应的羧酸6。酸脱水环化形成新型双环内酯8。