SYNTHESİS OF SOME NEW 6-ARYL-4-PYRAZOL-1-YL-PYRIDAZIN- 3-ONES AND THE SCREENING OF THEIR ANTİBACTERİAL ACTI- VITIES

Year 1990, , - , 01.01.1990

G. H. Sayed

https://doi.org/10.1501/Commub_0000000451

Abstract

Ş-aroylacrylic acids (1) react with 3,5-dimethylpyrazole to give a-(disubstituted phenacyl) -3,5-dimethylpyrazol-l-yl acetic acid (2). Reactions of (2) with hydrazine hydrate and phenyl hydrazine afford the corresponding 6-aryl-4-pyrazol--l-yl pyridazinones (3). The behaviour of the pyridazinones with dimethylsulphate, ethyl-bromoacetate, benzoyl chloride, benzenesul- fonyl chloride, bromine-acetic acid, phosphorus oxychloride and phosphorus pentasulfide have been described. The reaction of (2) with aldehyde gives the arylidene derivatives. Dehydration of (2) yields the furanone derivative. The in vitro antibacterial screening reveals mild activity against Gram-positive for compounds (5 b,c) , whilc compounds (2a) and (3e) are inactive.

Keywords

SYNTHESİS, THEIR ANTİBACTERİAL, THE SCREENING

References

• SYNTHESİS OF SOME NEW 6-ARYL-4-PYRAZOL-1-YL-PYRIDAZIN- 3-ONES AND THE SCREENING OF THEIR ANTİBACTERİAL ACTI- VITIES