Preparation of dithiophosphoric acid diester halides
AssigneeBayer Aktiengesellschaft
InventorHermann Arold
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Abstract
A process for the preparation of a dithiophosphoric acid diester halide of the formula ##STR1## IN WHICH R.sup.1 and R.sup.2 each independently is alkyl with 1 to 5 carbon atoms, and Hal is halogen, comprising reacting an S-alkyl dihalide of the formula ##STR2## WITH AN ALCOHOL OF THE FORMULA R.sup.2 OH at a temperature of about -5.degree. to -90.degree. C in the presence of about a 5 to 200% molar excess of potassium hydroxide. Advantageously about a 10 to 600% molar excess of alcohol is employed, R.sup.1 is n-propyl, R.sup.2 is ethyl, Hal is chlorine, and the reaction is effected in an aliphatic or aromatic optionally chlorinated hydrocarbon or an ether.
Claims10
A process for the preparation of a dithiophosphoric acid diester halide of the formula ##STR8## in which R.sup.1 and R.sup.2 each independently is alkyl with 1 to 5 carbon atoms, and
- Hal is halogen, comprising reacting an S-alkyl dihalide of the formula ##STR9## with an alcohol of the formula
- R.sup.2 OH
- at a temperature of about -5.degree. to -90.degree. C. in the presence of about a 5 to 200% molar excess of potassium hydroxide.
Dependencies are inferred from the claim text.