5-(4-nitrophenyl)-7-(thiophen-2-yl)-2-thioxo-2,3-dihydropyrido[2,3-d]pyrimidin-4(1H)-one 、
Ethyl {[4-(aminosulfonyl)phenyl]hydrazono}-(chloro)acetate 在
三乙胺 作用下,
以
1,4-二氧六环 为溶剂,
以72%的产率得到ethyl 6-(4-nitrophenyl)-5-oxo-1-(4-sulfamoylphenyl)-8-(thiophen-2-yl)-1,5-dihydropyrido[2,3-d][1,2,4]triazolo[4,3-a]pyrimidine-3-carboxylate