Process for the preparation of 4-benzoylpyrazole derivatives
申请人:Sankyo Company Limited
公开号:US04070536A1
公开(公告)日:1978-01-24
4-Benzoyl-5-hydroxypyrazole derivatives are prepared by treating 5-benzoyloxypyrazole derivatives with more than 1 equivalent mole of alkaline substance or more than 1 mole of aluminum chloride per mole of the 5-benzoyloxypyrazole derivatives. The desired pyrazole derivatives are useful as a herbicide.