H. Wamhoff, M. Tzanova
Mar 4, 2003
Citations
1
Influential Citations
3
Citations
Journal
Arkivoc
Abstract
Ethyl 5-amino-1,2,4-triazine-6-carboxylates 1a-b undergo condensation with aryl isocyanates 2a-b to afford the corresponding pyrimido[4,5-e][1,2,4]triazines 3a,b. Alternatively, 1a-b reacted with triphenylphosphine and hexachloroethane to afford the corresponding iminophosphoranes 6a-b, of which 6a with excess benzoyl chloride 7 afforded the 3,1oxazino[6,5-e][1,2,4]triazine 8a.