Process for preparing mono- and disubstituted mercapto-phosphorothionochloridates
US4100230A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Aug 4, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Mono- and disubstituted mercaptophosphorothionochloridates are prepared by reacting a disubstituted sulfide having the formula EQU R.sub.2 S wherein each R is an independently selected alkyl, cycloalkyl or benzyl, with phosphorus pentasulfide and thiophosphorus trichloride at a temperature from about 150.degree. to about 300.degree. C. A molar ratio of R.sub.2 S to P.sub.4 S.sub.10 to P(S)Cl.sub.3 of 6:1:8 is preferred where the monosubstituted compound is desired, while a ratio of 6:1:2 is preferred where the disubstituted compound is desired. The compounds are useful as intermediates for compounds which exhibit biocidal properties, particularly insecticides and herbicides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.