Reaction of 6-methyl-2-(2-oxo-2-phenyl-ethylidene)-2,3-dihydropyrimidin-4(1H)-one with hydrazine and hydroxylamine
作者:A. A. Yavolovskii、L. V. Grishchuk、I. M. Rakipov、D. E. Stepanov、Yu. E. Ivanov、G. L. Kamalov
DOI:10.1007/s10593-013-1162-z
日期:2013.1
The reaction of 6-methyl-2-(2-oxo-2-phenylethylidene)-2,3-dihydropyrimidin-4(1H)-one and of its nitrosation product with hydroxylamine stops at the stage of forming the corresponding oximes. The reaction of 6-methyl-2-(2-oxo-2-phenylethylidene)-2,3-dihydropyrimidin-4(1H)-one with hydrazine yields a mixture of 3-amino-5-phenylpyrazole and 3-methyl-2-pyrazolin-5-one in 71 and 62% yields, respectively. The ketoxime is used in the synthesis of a series of imidazole N(3)-oxides substituted at the 1, 4, and 5 positions of the imidazole ring.
Formation of N–S Bonds in Reactions of 2-[2-Oxo-1-(tosyloxyimino)-2-phenylethyl]pyrimidin-4(3H)-one and Its 6-derivatives with Thiourea and Potassium Thiocyanate
作者:A. A. Yavolovskii、Yu. E. Ivanov、L. V. Grishchuk、V. Kh. Kravtsov、M. S. Fonar’、G. L. Kamalov
DOI:10.1134/s1070428018080158
日期:2018.8
Reaction of potassium thiocyanate with 2-[2-oxo-1-(1-tosyloxyimino)-2-phenylethyl]pyrimidin-4-(3H)-one derivatives led to the formation of a new fused heterocyclic system with a common nitrogen atom, substituted 7H-[1,2,5]thiadiazolo[2,3-a]pyrimidin-7-one.