Direct Synthetic Approach to N-Substituted 1-Amino-2,3-dihydro-1H-imidazole-2-thiones
作者:Joachim G. Schantl、Irene M. Lagoja
DOI:10.3987/com-96-7715
日期:——
Schantl, Joachim G.; Kaehlig, Hanspeter; Prean, Michael, Heterocycles, 1994, vol. 37, # 3, p. 1873 - 1878
作者:Schantl, Joachim G.、Kaehlig, Hanspeter、Prean, Michael
DOI:——
日期:——
Addition products of hydrazine derivatives to azo-alkenes, part V: The reaction of ?-(1-phenylhydrazino)alkanone phyenylhydrazones with acids and acid derivatives
作者:J. G. Schantl、M. Prean
DOI:10.1007/bf00810587
日期:1993.3
The bifunctional title compounds 2 react with acylating, carbamoylating and sulfonylating reagents mostly at the primary amino group of the hydrazine function. Both functional groups of 2 are attacked by N,N'-carbonyldiimidazole converting it into 1H-1,2,4,5-tetrazepin-3-one derivatives 8. The acid-induced 1,4-elimination of phenylhydrazine from 2 gives rise to the formation of phenylosazones 3. In the presence of thiocyanic acid the intermediately formed phenylazo-alkenes 1 undergo [3 + 2]-cycloaddition furnishing 1-anilino-imidazoline-2-thiones 13.
Schantl Joachim G., Kaehlig Hanspeter, Prean Michael, Heterocycles, 37 (1994) N 3, S 1873-1878
作者:Schantl Joachim G., Kaehlig Hanspeter, Prean Michael
DOI:——
日期:——
1-Arylamino-1H-imidazoles by "Oxidative Reduction" --- Conversion of 1-Arylamino-2,3-dihydro-1H-imidazole-2-thiones