Processes for preparation of dithiocarbazates
US5466854A · kind A · utility
1Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1995 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Feb 10, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C337/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for preparation of 5-pyrazolemercaptan derivatives represented by the following general formula (I), which is useful for synthesis of sulfonylurea-based herbicides, and an intermediate thereof, ##STR1## wherein R.sup.1 represents hydrogen, C.sub.1 -C.sub.4 alkyl, allyl or propargyl, PA0 R.sup.2 represents hydrogen, C.sub.1 -C.sub.4 alkyl, or a phenyl group which can contain one or more substituent selected from the group consisting of halogen, nitro and methyl at an optional position, and PA0 R.sup.3 represents hydrogen, methyl, ethyl or phenyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.