Reactions of 1,3,5-triazinylnitroformaldoxime 4.* synthesis of (5-R-1,2,4-oxadiazol-3-yl)-1,3,5-triazines
作者:V. V. Bakharev、A. A. Gidaspov、E. V. Selezneva、V. E. Parfenov、I. V. Ulˈyankina、I. S. Nazarova、Yu. T. Palatova、O. S. Elˈtsov
DOI:10.1007/s10593-012-0901-x
日期:2012.1
5-triazin-2-ylnitroformaldoximes with nitriles leads not to the formation of 1,2,4-oxadiazoles but rather to dimerization of the intermediate 1,3,5-triazinylnitrile oxides to give furoxanes. The reaction of 4-R-6-methoxy-1,3,5-triazin-2-ylnitroformaldoximes with ammonia and amines gives 1,3,5-triazinylamidoximes, which upon acylation and subsequent intramolecular cyclization yield (5-R-1,2,4-oxadiazol-3-yl)-1,3,5-triazines
用腈加热4-R-甲氧基-1,3,5-三嗪-2-基硝基甲醛肟不导致形成1,2,4-恶二唑,而是导致中间体1,3,5-三嗪基腈的二聚反应得到呋喃烷。4-R-6-甲氧基-1,3,5-三嗪-2-基硝基甲醛肟与氨和胺反应生成1,3,5-三叠氮酰胺基肟,酰化后分子内环化收率(5-R-1, 2,4-恶二唑-3-基)-1,3,5-三嗪。