1H1,2,4-triazole derivatives,owing to their extensive uses in pharmaceutical synthesis, four 5substituted1H1,2,4triazoles were prepared with 5amino1H1,2,4triazole3carboxylic acid through diazotiz...1H1,2,4-triazole derivatives,owing to their extensive uses in pharmaceutical synthesis, four 5substituted1H1,2,4triazoles were prepared with 5amino1H1,2,4triazole3carboxylic acid through diazotization and Sandmeyer reaction.Their structures were characterized by IR,UV,1H NMR and MS.展开更多
Formylchrone reacted with aroylhydrazine to give corresponding hydrazone, which was treated with acetic anhydride to give a series of chromones with substitution of 1,3,4 dihydrooxadiazoly in 3 position. The chromone ...Formylchrone reacted with aroylhydrazine to give corresponding hydrazone, which was treated with acetic anhydride to give a series of chromones with substitution of 1,3,4 dihydrooxadiazoly in 3 position. The chromone formation reaction could be finished in a much short time by microwave irradiation heating.展开更多
文摘1H1,2,4-triazole derivatives,owing to their extensive uses in pharmaceutical synthesis, four 5substituted1H1,2,4triazoles were prepared with 5amino1H1,2,4triazole3carboxylic acid through diazotization and Sandmeyer reaction.Their structures were characterized by IR,UV,1H NMR and MS.
文摘Formylchrone reacted with aroylhydrazine to give corresponding hydrazone, which was treated with acetic anhydride to give a series of chromones with substitution of 1,3,4 dihydrooxadiazoly in 3 position. The chromone formation reaction could be finished in a much short time by microwave irradiation heating.
