5-Amino-3-(2-furanyl)-1H-pyrazole-1-carboxamide 在
hexanes 作用下,
以
hexanes 、 原戊酸三甲酯 为溶剂,
反应 0.5h,
以to give 2.0 g of the desired product as a solid, m.p. 190° C.的产率得到2-Butyl-7-(2-furanyl)-pyrazolo[1,5-a][1,3,5]-triazin-4(1H)-one
The invention provides novel 2,3-substituted pyrazolo[1,5-a]-1,3,5-triazin-4(3H)-ones having the formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are described in the specification which have activity as angiotensin II (AII) antagonists.