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    • 20. 发明授权
    • Process for preparing an N-substitued aldonamide
    • 制备N-取代的aldonamide的方法
    • US5741897A
    • 1998-04-21
    • US656735
    • 1996-06-03
    • Burkhard WeusteAndrea Katharina Jansen
    • Burkhard WeusteAndrea Katharina Jansen
    • C07H15/04C07H1/00C07H13/12
    • C07H15/04
    • The present invention generally relates to a process for preparing an N-substituted aldonamide by reacting an aldonic acid in a polar organic solvent with an amine of the formula HNR.sup.1 (X--NR.sup.1)nR.sup.2, wherein R1 and R.about. may be the same or different and represent a hydrogen atom, a (cyclo)aliphatic or aromatic hydrocarbon separated by a hetero-atom or not, an amino acid ester, an amino acid amide, an ether amine or an N-alkanoyl alkylene diamine according to the formula R.sup.3 --C(O)N(H)--R.sup.4 --, wherein R.sup.3 =C.sub.1 -C.sub.24 alkyl or alkenyl and R.sup.4 =C.sub.2 -C.sub.22 branched or linear alkylene group, which may contain heteroatoms like N, O, and S, X is a difunctional (cyclo)aliphatic or aromatic hydrocarbon separated or not by a heteroatom or a hydrocarbon substituted hetero-atom, and n=0 or 1, with the proviso that when n=0, R.sup.1 and R.sup.2 do not stand for a hydrogen atom simultaneously, characterised in that an aqueous syrup of the aldonic acid is reacted, optionally after esterification with an alcohol with simultaneous distilling off of the water which is present, at a temperature in the range of 30.degree. to 120.degree. C., with the amine in the organic solvent, which is distilled off wholly or in part simultaneously with any water still present and/or formed.
    • 本发明一般涉及一种通过使极性有机溶剂中的醛糖酸与式HNR1(X-NR1)nR2的胺反应制备N-取代的醛酮酰胺的方法,其中R 1和R差可以相同或不同 并且表示氢原子,被杂原子分开的(环)脂族或芳族烃,根据式R3-C的氨基酸酯,氨基酰胺,醚胺或N-烷酰基亚烷基二胺 (O)N(H)-R4-,其中R3 = C1-C24烷基或烯基,R4 = C2-C22支链或直链亚烷基,其可以含有杂原子如N,O和S,X是双官能 )被分离或不被杂原子或烃取代的杂原子分离的脂族或芳族烃,n = 0或1,条件是当n = 0时,R 1和R 2不同时代表氢原子,其特征在于 任选在同时用醇酯化之后使醛糖酸的水性糖浆反应 在30至120℃的温度范围内蒸馏掉有机溶剂中的胺,其与仍然存在的任何水全部或部分同时蒸馏掉,和/或 形成。