Preparation of N-alkyl- and N,N-dialkyldiaminoethanes
    2.
    发明授权
    Preparation of N-alkyl- and N,N-dialkyldiaminoethanes 失效
    N-烷基和N,N-二烷基二氨基甲烷的制备

    公开(公告)号:US5158974A

    公开(公告)日:1992-10-27

    申请号:US597047

    申请日:1990-10-15

    CPC分类号: C07C209/60

    摘要: A process is described for the preparation of an N-alkyl- or N,N-dialkyl-1,2-diaminoethane of the general formula I ##STR1## where R.sup.1 is hydrogen or methyl, R.sup.2 is C.sub.1 - to C.sub.5 -alkyl, and R.sup.3 is hydrogen or C.sub.1 - to C.sub.5 -alkyl, with the proviso that the total number of carbon atoms in R.sup.2 and R.sup.3 is an integer from 1 to 6, by reacting an imine of the general formula II ##STR2## with an amine of the general formula III ##STR3## where R.sup.1, R.sup.2 and R.sup.3 are as defined above, which comprises carrying out the reaction in the presence of carbon dioxide at from 10.degree. to 150.degree. C. and at from 0.5 to 50 bar.

    摘要翻译: 描述了制备通式I(I)的N-烷基 - 或N,N-二烷基-1,2-二氨基乙烷的方法,其中R1是氢或甲基,R2是C1-至C5- 烷基,并且R 3是氢或C 1至C 5 - 烷基,条件是R 2和R 3中的碳原子总数为1至6的整数,通过使通式II的亚胺(II) )与通式III(III)的胺反应,其中R 1,R 2和R 3如上定义,其包括在二氧化碳存在下在10-150℃下进行反应 0.5至50巴。

    Method for the production of glyceric acid
    7.
    发明授权
    Method for the production of glyceric acid 失效
    生产甘油酸的方法

    公开(公告)号:US06844467B2

    公开(公告)日:2005-01-18

    申请号:US10469929

    申请日:2002-03-05

    摘要: Glyceric acid compounds of the formula (I) R1R2C(OH)—CR3(OH)—COOX  (I) where R1, R2 and R3 are independently hydrogen, C1-12-alkyl, C6-12-aryl, C7-13-alkaryl or C7-13-aralkyl and X is hydrogen, an alkali metal, an alkaline earth metal/2 or NH4, are prepared by saponification of glycidic acid compounds of the formula (II) where Y is NH2 or OR4 in which R4 is C1-12-alkyl or C7-13-aralkyl, with ring-opening addition of water onto the epoxide ring. Preferably, Y is NH2 and the glycidamide of the formula (II) which is used is prepared by reacting acrylonitriles of the formula (III) R1R2C═CR3CN  (III) with hydrogen peroxide.

    摘要翻译: 式(I)的甘油酸化合物,其中R 1,R 2和R 3独立地是氢,C 1-12 - 烷基,C 6-12 - 芳基,C 7-13 - 烷芳基或C 7-13 - 芳烷基和X是氢,碱金属,碱土金属/ 2或NH 4是通过皂化式(II)的缩水甘油酸化合物制备的,其中Y是NH 2或OR 4,其中R 4是C1- 12位烷基或C 7-13芳烷基,在环氧化物环上开环加水。优选地,Y是NH 2,所用式(II)的缩水甘油酰胺是通过使式(III)的丙烯腈与式 与过氧化氢。