Pyrimidines. Part XXIII. Synthesis of pyrimido[4,5-b][1,4]oxazines by reaction of 4,5-diaminopyrimidine derivatives with α-halogeno-ketones
作者:Jean Mirza、Wolfgang Pfleiderer、A. D. Brewer、Alexander Stuart、H. C. S. Wood
DOI:10.1039/j39700000437
日期:——
ketone is shown to give pyrimido [4,5-b][1,4]oxazines and not the expected dihydropteridine derivatives. Similar condensations with a number of different α-halogeno-aldehydes and α-halogeno-ketones have been studied, and the factors which control the nature of the product have been determined. Some preliminary studies of the chemical reactivity of pyrimido-[4,5-b][1,4]oxazines have been carried out.
某些4,5-二氨基嘧啶衍生物与α-溴异丙基甲基酮的缩合反应显示出嘧啶[4,5- b ] [1,4]恶嗪,而不是预期的二氢蝶啶衍生物。已经研究了与许多不同的α-卤代醛和α-卤代酮的类似缩合反应,并确定了控制产物性质的因素。已对嘧啶基-[4,5- b ] [1,4]恶嗪的化学反应性进行了一些初步研究。