| 摘要 |
The invention comprises phosphoric, thiophosphoric, and phosphoric acid esters of the general formula R1S(O).R2.X.P(Y)(OR3)(OR4) wherein R1 is an unsubstituted or substituted alkyl, aralkyl, or aryl radical, R2 is an alkylene radical (including methylene), X is O, S, or a direct C-P linkage, Y is O or S, and R3 and R4 are unsubstituted or substituted alkyl radicals. They may be obtained by oxidizing with hydrogen peroxide the corresponding sulphide esters of the formula R1S.R2.X.P(Y)(OR3)(OR4). Specified alkyl radicals are C1 to C6 alkyl radicals, and the substituted alkyl radicals may be alkoxy- or halogen-substituted alkyl radicals. The aralkyl or aryl radicals may be subsituted by alkyl, alkoxy, halogen, nitro, amino, carboxy, or cyano groups. The alkylene radical may be branched or straight chain with preferably 1 to 6 carbon atoms. The oxidation with hydrogen peroxide is preferably carried out at between 10 DEG and 60 DEG C. and, if desired, in the presence of a water-miscible organic solvent, e.g. acetone, glacial acetic acid, or an alcohol corresponding to the alkoxy radical present in the phosphorus-containing ester starting material. Examples are given for the production of compounds of the formula: <FORM:0795860/IV (b)/1> <FORM:0795860/IV (b)/2> <FORM:0795860/IV (b)/3> <FORM:0795860/IV (b)/4> <FORM:0795860/IV (b)/5> <FORM:0795860/IV (b)/6> <FORM:0795860/IV (b)/7> <FORM:0795860/IV (b)/8> <FORM:0795860/IV (b)/9> <FORM:0795860/IV (b)/1 and <FORM:0795860/IV (b)/123> Other esters that may be used as starting materials are also specified including alkyl mercapto propylene thio phosphoric acid esters. The products are stated to be valuable as systemic insecticides. The alkylmercaptoalkylphosphonic acid esters which are used as starting materials to form the corresponding compounds having the C-P linkage may be obtained by reacting a chloroalkyl alkyl sulphide with a sodium dialkyl phosphite. Specifications 697,120 and 742,796 are referred to. |
