| 摘要 |
1313983 Substituted phenyl hydrazones UPJOHN CO 1 Nov 1971 [27 Nov 1970] 50597/71 Heading C2C Compounds of formula where R a and R b are independently C 1-4 alkyl or together form an unsubstituted or C 1-4 alkyl substituted ethylene or methylene group with 2-9 carbon atoms; Y is halogen, or C 1-4 alkyl, haloalkyl, alkoxy or alkylmercapto; n is 0-5; z is Cl or Br; and X is S, SO or SO 2 , may be prepared in the -S- form by condensing an alkyl mercaptan or alkanedithiol with a glyoxoyl halide 1-phenylhydrazone in the presence of an acid catalyst, e.g. p-toluene sulphonic acid or BF 3 etherate. The S group may be oxidized to SO or SO 2 with peracetic or perbenzoic acid. The compounds are pesticides. |
