Novel process for the preparation of 2-aminomethylpyridine derivative
申请人:Bayer CropScience SA
公开号:EP1422221A1
公开(公告)日:2004-05-26
Process for the preparation of 2-aminomethylpyridine derivative of general formula (I) or a salt thereof :
in which :
n represents 0, 1, 2 or 3,
X is halogen atom,
each Y may be the same or different and may be a halogen atom, a halogenoalkyl, an alkoxycarbonyl or an alkylsulphonyl.
The present invention relates to an improved process for the preparation of substituted pyridylmethyl-benzamide derivatives of formula (I), in particular 2,6-Dichloro-N-[3-chloro-5-(trifluoromethyl)-2-pyridyl]methyl}benzamide (Fluopicolide), from substituted 2-(Aminomethyl)pyridine derivatives which are obtained by Raney-Nickel hydrogenation.
The present invention relates to an improved process for the preparation of substituted pyridylmethyl-benzamide derivatives of formula (I), in particular 2,6-Dichloro-N-[3-chloro-5-(trifluoromethyl)-2-pyridyl]methyl}benzamide (Fluopicolide), from substituted 2-(Aminomethyl)pyridine derivatives which are obtained by Raney-Nickel hydrogenation.