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    • 10. 发明授权
    • Preparation of glycine-N,N-diacetic acid derivatives
    • 甘氨酸-N,N-二乙酸衍生物的制备
    • US5849950A
    • 1998-12-15
    • US653024
    • 1996-05-24
    • Thomas GreindlAlfred OftringGerold BraunJochen WildBirgit Potthoff-KarlGeorg Schuh
    • Thomas GreindlAlfred OftringGerold BraunJochen WildBirgit Potthoff-KarlGeorg Schuh
    • C07C227/18C07C227/26C07C229/16C07C229/00
    • C07C227/26
    • Glycine-N,N-diacetic acid derivatives I ##STR1## where R is unsubstituted or substituted alkyl, alkenyl, alkoxylate groups, phenylalkyl, phenyl, a heterocyclic ring or a radical of the formula ##STR2## where A is an alkylene bridge or a chemical bond, and M is hydrogen, alkali metal, alkaline earth metal, ammonium or substituted ammonium in the appropriate stoichiometric amounts, are prepared by reacting A) corresponding 2-substituted glycines or 2-substituted glycinonitriles or doubled glycines of the formula ##STR3## or doubled glycinonitriles of the formula ##STR4## or precursors of the glycine derivatives named as starting material with formaldehyde and hydrogen cyanide in aqueous medium at a pH of from 0 to 11 or B) iminodiacetonitrile or iminodiacetic acid with appropriate monoaldehydes of the formula R--CHO or dialdehydes of the formula OHC--A--CHO and hydrogen cyanide in aqueous medium at a pH of from 0 to 11 and, where appropriate, subsequent hydrolysis of nitrile functionalities which are present, where the starting material used comprises unpurified raw material derived from the industrial synthesis of glycine derivatives or their precursors or of iminodiacetonitrile or iminodiacetic acid, or mother liquors produced in such syntheses.
    • 甘氨酸-N,N-二乙酸衍生物I(I)其中R是未取代或取代的烷基,烯基,烷氧基化物,苯基烷基,苯基,杂环或下式的基团其中A是亚烷基 桥或化学键,并且M是氢,碱金属,碱土金属,铵或取代的铵以适当的化学计量的量,通过使A)相应的2-取代的甘氨酸或2-取代的甘氨酸腈或式 或者在水性介质中以甲醛和氰化氢命名为起始原料的甘氨酸衍生物的前体(pH值为0至11)或B)亚氨基二乙腈或亚氨基二乙酸与适当的单醛 式R-CHO或式OHC-A-CHO的二醛和氰化氢在水介质中的pH为0至11,并且在适当的情况下随后水解腈官能团 其中使用的起始材料包括衍生自甘氨酸衍生物或其前体或亚氨基乙腈或亚氨基二乙酸的工业合成的未纯化原料,或在这种合成中产生的母液。