| 摘要 |
Title compds. I (R = H, halo, carboalkoxy, CN-group substituted C1-7 alkyl, substituted phenyl, alkenyl; R1, R2 = alkyl, phenyl, alkoxy, alkylthio; X = halo; Z = S, O), useful as insecticides, acarcides, and nematocides, were prepd. by the reaction of 5(3)-hydroxypyrazole alkali salt with (thio) phosphorinic acid halide. Thus, 7 g 1-phenylsemicarbazide and 7.4g, -dichloroacryloyl chloride gave 8 g 1-(, -dichloroacryloyl)-1-phenyl-semicarbazide, 5.5 g of which was cyclized to give 1-phenyl-3-chloro-5-hydroxypyrazole.
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