Compounds represented by the formula
1
wherein R and R
1
independently represent H, —CH
2
CN or —CH
2
CO
2
X, with the proviso that R and R
1
can not be both H or —CH
2
CO
2
X; and X represents hydrogen, an alkali metal or alkaline earth metal are disclosed. These compounds are useful as intermediate compounds in the preparation of N-[2-(carboxymethoxy)ethyl]-N-(carboxy-methyl)glycine. These intermediates can be formed by contacting 3-morpholinone with glycolonitrile under alkaline conditions to form an aminonitrile which can be hydrolyzed and contacted with additional glycolonitrile to form the nitrile intermediate which can be converted to N-[2-(carboxymethoxy)ethyl]-N-(carboxymethyl)glycine via hydrolysis.
本发明涉及一种由式1表示的化合物,其中R和R1分别独立表示H、—CH2CN或—CH2CO2X,但R和R1不能同时为H或—CH2CO2X;X表示氢、碱
金属或碱土
金属。这些化合物可用作制备N-[2-(羧甲氧基)乙基]-N-(羧甲基)甘
氨酸的中间化合物。这些中间体可以通过在碱性条件下将3-吗啉酮与甘腈接触以形成
氨基腈,然后
水解并与额外的甘腈接触以形成腈中间体,然后通过
水解将其转化为N-[2-(羧甲氧基)乙基]-N-(羧甲基)甘
氨酸。