PROCESS FOR THE PREPARATION OF N,N'-BIS(2-HYDROXYBENZYL)ETHYLENEDIAMINE-N,N'-DIACETIC ACID AND ITS DERIVATIVES
申请人:Nawrocki Adam
公开号:US20100168469A1
公开(公告)日:2010-07-01
The invention relates to a process for the preparation of N,N′-bis(2-hydroxybenzyl)-ethylenediamine-N,N′-diacetic acid and its derivatives of general formula (I), wherein both R have the same meaning and are selected from H, C
1
-C
4
alkyl, CH
2
OH, SO
3
M, and COOM; and all M have the same meaning and represent hydrogen atom, Na, K or NH
4
; which comprises reductive amination of glyoxylic acid with a salan compound of general formula (II), in the presence of an amine proton acceptor. The compounds of formula (I) can be used as chelating agents for micronutrients in fertilizer preparations for plants.
本发明涉及一种制备N,N'-双(2-羟基苯甲基)-乙二胺-N,N'-二乙酸及其通式(I)衍生物的过程,其中两个R具有相同的含义,可选择自H,C1-C4烷基,CH2OH,SO3M和COOM中;所有的M具有相同的含义,代表氢原子,Na,K或NH4;该过程包括在胺质子受体的存在下,用通式(II)的萨兰化合物对乙酰乙酸进行还原胺化。通式(I)的化合物可用作植物肥料制备中微量营养素的螯合剂。