| 摘要 |
NEW MATERIAL:The compound of formula I [R1 and R2 are H, (substituted) alkyl or (substituted) phenyl; X is H, halogen, acyl, nitroso or (substituted) amino; Y is H or aralkyl]. EXAMPLE:7-Acetyl-1-benzyl-2,6-dimethylpyrazolo[1,5-b][1,2,4]triazole. USE:A magenta coupler for color photographic material. PREPARATION:The objective compound can be produced e.g. by (1) reacting the compound of formula II (R3 is methyl; R4 is alkyl) (e.g. 2,5-dimethyl-1,3,4-oxadiazole) with benzylamine, (2) treating with an amination agent (e.g. hydroxylamine- O-sulfonic acid) and HI to obtain the compound of formula III (e.g. 1-amino-4- benzyl-3,5-dimethyltriazolium iodide), and (3) subjecting the compound to the cyclization condensation reaction in the presence of the acid anhydride of formula IV [R5 is (substituted) alkyl or (substituted) phenyl] (e.g. acetic anhydride) and a base.
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