| 摘要 |
The pryrazole sulfonylchloride derivative of structural formula(I) is prepared by reacting pyrazole disulfide derivative of structural formula(IV) with aqueous hydrochloride solution and hydroperoxide under solvent such as n-hexane, dichlormethane or no solvent. The produced pyrazole sulfonylchloride is used as an intermediate of pyrazole sulfonyl urea series weedicide. In the above formula, R1 is hydrogen atom, alkyl or phenyl group with carbon number 1~4, R2 is hydrogen atom, alkyl, aryl or propagyl group with carbon number 1~4. R3 is hydrogen atom, methyl, ethyl or phenyl group.
|
