Processes for preparation of 5-pyrazolemercaptan derivatives and intermediates thereof
申请人:LUCKY LTD.
公开号:EP0602589B1
公开(公告)日:1996-06-26
Jensen,K.A. et al., Acta Chemica Scandinavica (1947), 1969, vol. 23, p. 1916 - 1934
作者:Jensen,K.A. et al.
DOI:——
日期:——
Processes for preparation of 5-pyrazolemercaptan derivatives and
申请人:Lucky Ltd.
公开号:US05405965A1
公开(公告)日:1995-04-11
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 sulfonyl-urea-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.