Novel reaction of uracil derivatives possessing electron-withdrawing groups at the 5-position with amines: exchange reaction between the N1-portion of uracils and amines
作者:Kosaku Hirota、Yukio Kitade、Hironao Sajiki、Yoshifumi Maki、Motoi Yogo
DOI:10.1039/p19900000367
日期:——
The reaction of 1,3-disubstituted uracils possessing an electron-withdrawing group such as nitro, carbamoyl, and cyano at the 5-position with primary amines resulted in the exchange of the N1-portion of the uracil ring with the amine moiety. The exchange reactions were influenced by the nature of substituents at the 5- and N1-position. The reaction sequence is explained in terms of addition, ring-opening
具有在5-位的吸电子基团例如硝基,氨基甲酰基和氰基的1,3-二取代的尿嘧啶与伯胺的反应导致尿嘧啶环的N 1部分与胺部分交换。交换反应受5-和N 1-位上取代基的性质影响。用加成,开环和闭环的方式解释反应顺序。