申请人:Novartis Corporation
公开号:US05726343A1
公开(公告)日:1998-03-10
Process for the preparation of 2-methoxyimino-2-arylacetic esters of formula (I) in which R is C.sub.1 -C.sub.12 alkyl, which comprises reacting an appropriately substituted boronic acid of general formula (II) or the trimeric form (lII) herein, which is in equilibrium with it, in the presence of a Pd catalyst, with a methoxyiminoacetic ester of formula (IV) in which R is C.sub.1 -C.sub.12 alkyl and X is a leaving group. According to a further process variant, in principle the groups which split off the two reactants may change places. The process can be applied not only to phenyl derivatives but also to larger ring systems (naphthyl, pyridyl, heterocycles).
制备式(I)的2-甲氧基亚胺基-2-芳基乙酸酯的方法,其中R为C.sub.1-C.sub.12烷基,包括在Pd催化剂的存在下,将通式(II)或此处的三聚体形式(III)中的适当取代的硼酸与式(IV)的甲氧基亚胺基乙酸酯反应,其中R为C.sub.1-C.sub.12烷基,X为离去基团。根据另一种方法变体,原则上,两个反应物分裂的基团可以交换位置。该方法不仅适用于苯衍生物,也适用于更大的环系统(萘基,吡啶基,杂环)。