[EN] NOVEL PROCESS FOR THE PREPARATION OF 2-AMINOMETHYLPYRIDINE DERIVATIVES<br/>[FR] NOUVEAU PROCEDE DE PREPARATION DE DERIVES DE LA 2- AMINOMETHYLPYRIDINE
申请人:BAYER CROPSCIENCE AG
公开号:WO2004096772A1
公开(公告)日:2004-11-11
The present invention relates to a novel process for the preparation of 2-amino-methylpyridine derivatives of the formula (I), comprising reacting in a first step 2-substituted pyridine derivatives of the formula (II), with a nitroalkane of the formula (III), in the presence of a base resulting in 2-nitromethylpyridine derivatives of the formula (IV) and hydrogenating these 2-nitromethylpyridine derivatives of the formula (IV) in a second step in the presence of a catalyst and in the presence of an acid, where in the formulae n, X, Y, R1, R2 and A are as defined in the description.
本发明涉及一种新型的制备2-氨基甲基吡啶衍生物的方法,包括以下步骤:第一步,将式(II)的2-取代吡啶衍生物与式(III)的硝基烷在碱的存在下反应,得到式(IV)的2-硝基甲基吡啶衍生物;第二步,在催化剂和酸的存在下,对式(IV)的2-硝基甲基吡啶衍生物进行氢化反应,得到式(I)的2-氨基甲基吡啶衍生物。其中,式中n、X、Y、R1、R2和A的定义详见说明书。