Obtaining an aliphatic dialdehyde Monoacetal
    8.
    发明授权
    Obtaining an aliphatic dialdehyde Monoacetal 失效
    获得脂族二醛单缩醛

    公开(公告)号:US07498451B2

    公开(公告)日:2009-03-03

    申请号:US10536900

    申请日:2003-11-27

    IPC分类号: C07D317/26 C07C45/64

    摘要: The invention relates to a process for obtaining a pure aliphatic dialdehyde monoacetal by reaction of the corresponding aliphatic dialdehyde or a precursor of the corresponding aliphatic dialdehyde with one or more aliphatic mono- or polyhydric alcohols while distillatively removing water to obtain a reaction mixture which is separated distillatively, which comprises carrying out the distillative separation continuously in a dividing wall column to obtain pure aliphatic dialdehyde monoacetal as a sidestream from the dividing wall column, or in two distillation columns to obtain crude aliphatic dialdehyde monoacetal as a sidestream in the first distillation column, feed the crude aliphatic dialdehyde monoacetal to the second distillation column and obtain pure aliphatic dialdehyde monoacetal as the sidestream from the second distillation column.

    摘要翻译: 本发明涉及通过相应的脂族二醛或相应的脂族二醛的前体与一种或多种脂肪族一元醇或多元醇反应而获得纯的脂族二醛单缩醛的方法,同时蒸馏除去水,得到分离的反应混合物 蒸馏,其包括在分隔壁塔中连续进行蒸馏分离以获得作为来自分隔壁塔的侧流的纯脂族二醛单缩醛,或在两个蒸馏塔中,以在第一蒸馏塔中获得作为侧流的粗脂族二醛单缩醛, 将粗脂族二醛单缩醛进料至第二蒸馏塔,得到作为来自第二蒸馏塔的侧流的纯脂族二醛单缩醛。

    Process for preparing polyenedialdehyde monoacetals
    9.
    发明授权
    Process for preparing polyenedialdehyde monoacetals 失效
    制备多烯醛单缩醛的方法

    公开(公告)号:US07045641B2

    公开(公告)日:2006-05-16

    申请号:US10336827

    申请日:2003-01-06

    摘要: A process for preparing compounds of the formula I is described and entails converting a compound of the formula II by Wittig or Wittig-Horner reaction into a compound of the formula IV, where appropriate converting the compound of the formula IV by hydrolysis of the acetal function and Wittig or Wittig-Horner reaction into a compound of the formula VI and converting the compound of the formula IV or VI in two stages into the compound of the formula I. The radicals R1, R2 and R6 and k have the meaning indicated in the description. Novel intermediates are also described.

    摘要翻译: 描述了制备式I化合物的方法,并且需要通过Wittig或Wittig-Horner反应将式II化合物转化为式IV化合物,其中适当的方法是通过水解缩醛官能团转化式IV化合物 和Wittig或Wittig-Horner反应转化为式VI的化合物,并将式IV或VI的化合物分两步转化为式I的化合物。基团R 1,R 0 > 2 和R 6和k具有说明书中指出的含义。 还描述了新的中间体。