| 摘要 |
A process for the preparation of a 5,7-diaryloxy-2-(2-heteroaryl)-triazolo[1,5-a][1,3,5]triazine, which comprises reacting a N-2-(4,6-diaryloxy)-[1,3,5]triazinyl-N'-(2-heteroarylcarbonyl)hydrazine with a polyphosphoric acid silyl ester. The invention also provides a multistep process for preparing certain triazolotriazines having activity asadenosine antagonists.
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