| 摘要 |
1345629 Thiophosphoric acid esters BAYER AG 23 Dec 1971 [26 Dec 1970] 59937/71 Heading C2P The invention comprises thiolophosphoric acid esters of the general formula wherein R<SP>1</SP> is methyl or ethyl, R<SP>2</SP> is -propyl, X is halogen, C 1 -C 4 alkyl, NO 2 , CN, phenyl, C 1 -C 4 alkyl mercapto, C 1 -C 4 alkylsulphinyl, C 1 -C 4 alkoxy, C 2 -C 5 alkoxycarbonyl or C 2 -C 5 alkylcarbonyl and m is 1, 2 or 3, X being the same or different when m is 2 or 3, provided that when m is 1, X may not be phenyl or alkoxy and when m is 2 or 3 either at least one X is C 1 -C 4 alkyl, NO 2 , CN, C 1 -C 4 alkylmercapto, C 1 -C 4 alkylsulphinyl, C 2 -C 5 alkoxycarbonyl or C 2 -C 5 alkyl carbonyl or each X is halogen. They may be obtained (a) by reacting a diester halide (R<SP>1</SP>O)(R<SP>2</SP>S)P(O)Hal with a phenol (if desired in the presence of an acid binding agent) or salt thereof of the formula where M<SP>1</SP> is H or a metal or ammonium, (b) by reacting a compound with an oxidizing agent, e.g. H 2 O 2 , this method being applicable when at least one X in the product is S(O)R<SP>3</SP>, wherein R<SP>3</SP> is C 1 -C 4 alkyl, or (c) by reacting a salt in which M<SP>2</SP> is a metal or ammonium with a haidle: R<SP>2</SP>Hal. The products have pesticidal properties and may be used as active ingredients in conventional pesticidal formulations. The compound (C 2 H 5 O)(n-C 3 H 7 S)P(O)Cl is obtained by reacting (nC 3 H 7 S)P(O)Cl 2 with ethanol in the presence of benzene and triethylamine. The potassium salt of O-ethyl-O-4-methylthiophenyl thiophosphoric acid is obtained by reacting the corresponding thionophosphoryl chloride with KOH in the presence of water and dioxan. The potassium salt of O-ethyl- 0(2,4 - dichlorophenyl) thiophosphate is obtained in a similar manner from the appropriate thiophosphoryl chloride. |
