| 摘要 |
<p>A process for the preparation of a 5,7-diaryloxy-2-(2-heteroaryl)-triazolo[1,5-a][1,3,5]triazine of formula II, which comprises reacting a N-2-(4,6-diaryloxy)-[1,3,5]triazinyl-N min -(2-heteroaryl-carbonyl)hydrazine of formula III with a polyphosphoric acid silyl ester. The invention also provides a multistep process for preparing certain triazolotriazines having activity as adenosine antagonists. <CHEM> i</p> |
