Preparation of dithiophosphoric acid diester halides
US4130607A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Sep 2, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/206
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 PA0 Hal is halogen, comprising reacting an S-alkyl dihalide of the formula ##STR2## WITH AN ALCOHOL OF THE FORMULA EQU 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.