Mercapto-substituted pyridine compounds and process for preparing the same
申请人:ISHIHARA SANGYO KAISHA, LTD.
公开号:EP0298752A2
公开(公告)日:1989-01-11
A mercapto-substituted pyridine compound having the general formula (I):
where R₁ and R₂ are hydrogen atom or alkyl group, and n is 0 or 1, and salts thereof and a process for preparing the same are disclosed. The mercapto-substituted pyridine compound is useful as an intermadiate for preparing a herbicidal compound.
Process for preparing halogenosulfonyl-substituted pyridine compounds
申请人:ISHIHARA SANGYO KAISHA, LTD.
公开号:EP0532058A1
公开(公告)日:1993-03-17
A process for producing a compound of the general formula (A):
wherein each of R¹ and R₂ is a hydrogen atom or an alkyl group, n is 0 or 1 and Hal is a halogen atom; comprises oxidising and halogenating a compound of the general formula (B):
wherein R₁, R₂ and n are as defined above, or a salt thereof.