Cyclic guanidines: Synthesis of 4,6,7,8-tetrahydro-1h-imidazo[1,2-α]pyrazolo[3,4-d]pyrimidin-7-ones and 1,4,6,7,8,9-hexahydropyrazolo[3',4':4,5]pyrimido[2,1-c] [1,2,4]triazin-7-ones

Article abstract of DOI:10.1002/jhet.5570270401

The synthesis of potential platelet aggregation inhibitors 4,6,7,8-tetrahydroimidazo[1,2-α]pyrazolo[3,4-d]-pyrimidin-7-ones and 1,4,6,7,8,9-hexahydropyrazolo[3',4':4,5]pyrimido[2,1-c] [1,2,4]triazin-7-ones derivatives is described starting from 4,6-dichlo