摘要:
The newly synthesized ethyl 3‐amino‐5‐phenylpyrazole‐4‐carboxylate 1 was diazotized and coupled with β‐naphthol, active methylene reagents 6, 9, 12, 15, and the active methine 19 to afford the pyrazolo[5,1‐c]triazines 5, 8, 11, 14, 17, 18, and the pyrazolo[5,1‐c]‐1,2,4‐triazoles 21, 22, and 23, respectively. Structures are elucidated and mechanisms are discussed.