Dithiocarbazate compounds
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United States of America Patent
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Nov 21, 1995
Issued Date -
N/A
app pub date -
Feb 10, 1995
filing date -
Dec 17, 1992
priority date (Note) -
Expired
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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, 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 R.sup.3 represents hydrogen, methyl, ethyl or phenyl.
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