Synthesis of 4-substituted 8-amino-4,5-dihydro-3H-pyrrolo[3,4-f]-1,3,5-triazepin-6-ones and 5-amino-2-aryl-4-(1-aryl-5-alkylideneaminoimidazol-4-yl)1,3-oxazoles
作者:M. José Alves、Omar Kh. Ai-Duaij、Brian L. Booth、Alice Carvalho、Paul R. Eastwood、M. Fernanda J. R. P. Proença
DOI:10.1039/p19940003571
日期:——
alkylideneamino bond competes with amidine formation to give compound 8, and reaction between the formimidate 7c and p- anisidine resulted only in the formation of ethyl (Z)-N-(2-amino-2-carbamoyl-1-cyanovinyl)formimidate 8. Reactions between N2-aryl-(Z)-N1-(2-amino-1,2-dicyanovinyl)formimidamides and aldehydes in the presence of a base do not give 1, 3, 5-triazepines, but instead afford novel 5-a
Synthesis of 6-cyanopurines and the isolation and X-ray structure of novel 2<i>H</i>-pyrroles
作者:M. José Alves、M. Alice Carvalho、M. Fernanda J.R.P. Proença、Brian L. Booth、Robin G. Pritchard
DOI:10.1002/jhet.5570340306
日期:1997.5
2-dicyanovinyl)-N2-substituted-formainidines react with dimethylformamide diethyl acetal at room temperature to give 6-cyanopurines as the major product together with novel 5-amino-2-arylimino-3,4-di[(N,N-dimethylamino)methylideneamino]-2H-pyrroles, which have been fully characterised and a single crystal X-ray analysis has been carried out on the N-phenyl derivative.