Utilization of Cleavage of the [1]Benzofuro[2,3-e][1,2,4]triazine Ring for the Synthesis of Oxygen, Nitrogen and Sulfur Derivatives of [1,2,4]Triazine [1]

Article abstract of DOI:10.1002/jhet.5570400509

A series of 6-azacytosines 4a-4k and 5a-5c were prepared by nucleophilic cleavage of furan ring of [1]benzofuro[2,3-e][1,2,4]triazine derivative 1. Some of them were used for the preparation of derivatives of [1,2,4]triazolo[4,3-d][1,2,4]triazine (6a-6d)