A novel tautomerism in alkyl dihydropyrimidines : observation of tautomerism by H-D exchange of 2- and/or 4-methyl protons of dihydropyrimidines in CD3OD
作者:Yong Hae Kim、Byoung Uk Lim
DOI:10.1016/s0040-4039(00)78907-6
日期:1991.4
A novel tautomerism was found in dihydropyrimidines such as 2-amino-4,6,6-trimethyldihydropyrimidine 1 and 2,4,6,6-tetramethyldihydropyrimidine 2 by the observation of H-D exchange on both 4-methyl protons of 1 and 2,4-dimethyl protons of 2 by the treatment of 1 and 2 with CD3OD in the absence of base under mild conditions.
一种新的互变异构现象是在二氢嘧啶如2-氨基-4,6,6- trimethyldihydropyrimidine发现1和2,4,6,6-tetramethyldihydropyrimidine 2由HD交换的上的两个4-甲基质子的观察1和2,4- -在温和条件下,在不存在碱的情况下,用CD 3 OD处理1和2,得到1和2的2-二甲基质子。