Phosphonic acid esters and a process for their pro

专利名称：Phosphonic acid esters and a process for

their production

发明人：SCHRADER GERHARD申请号：US76959358申请日：19581027公开号：US2918488A公开日：19591222

摘要：The invention comprises thiophosphonic acid esters of the general formulaR.P(S)(OR1)(XR2) in which R is a phenyl substituted vinyl radical or a vinyl radical

substituted by one or more C1-C4 alkyl radicals, R1 is an alkyl radical containing up to 4carbon atoms, R2 is an alkyl mercapto alkylene radical wherein the alkyl and alkyleneradicals contain up to 4 carbon atoms and X is oxygen or sulphur. They may be obtainedby reacting a compound of the formula R.P(S)(OR1)(Hal) wherein Hal is a halogen atom,e.g. Cl or Br, with a compound of the formula R2XH in the presence of an acid bindingagent, The reaction is suitably carried out in an inert organic solvent, e.g. ethanol,acetone, methyl ethyl ketone or benzene. Specified acid binding agents are alkali metalalcoholates, e.g. sodium ethylate and suitable reaction temperatures are from roomtemperature up to about 100 DEG C. Examples are given for the production of

compounds in which R is C6H5.CH=CH-, R1, is ethyl and -XR2 is SCH2CH2SC2H5, -S.CH2.CH2.S.CH3, -S-CH2SC2H5 and -O-CH2. CH2.S.C2H5 respectively, and in which R is , R1 isethyl and -XR2 is S.CH2CH2SC2H5 and S.CH2.SC2.H5 respectively and of the compound inwhich R is , R1 is CH3 and -XR2 is -S.CH2.CH2.SC2H5. The products have pesticidalproperties (see Group VI).ALSO:A pesticidal composition comprises a solid or liquid

diluent or extender and as active ingredient thio phosphonic acid ester of the formulaR.P(S) (OR1)(XR2) in which R is a phenyl substituted vinyl radical or a vinyl radical

substituted by one or more C1-C4 alkyl radicals, R1 is an alkyl radical containing up to 4carbon atoms, R2 is an alkyl-mercapto-alkylene radical wherein the alkyl and alkyleneradicals contain up to 4 carbon atoms and X is oxygen or sulphur. Specified diluents arechalk, talc, bentonite, charcoal, water (if necessary with the addition of a solubilizingagent and/or emulsifier e.g. benzyl hydroxy diphenyl polyglycol ether). A suitablecomposition is obtained by mixing the compound C6H5,CH = CH,P(S)(OC2H5)

(,S,CH2S,C2H5) with acetone, adding benzyl hydroxy diphenyl polyglycol ether and thendiluting the mixture with water.

申请人：FARBENFABRIKEN BAYER AKTIENGESELLSCHAFT

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