Preparation of pentanediols from alkoxydihydropyrans
    1.
    发明授权
    Preparation of pentanediols from alkoxydihydropyrans 失效
    从烷氧基二氢吡喃制备戊二醇

    公开(公告)号:US06403845B1

    公开(公告)日:2002-06-11

    申请号:US09625487

    申请日:2000-07-25

    IPC分类号: C07C2700

    摘要: are prepared by single-stage reaction of alkoxydihydropyrans of the formula (II) with water and hydrogen in the presence of a catalyst comprising oxides of nickel, zirconium and copper. In the formulae (I) and (II), R, R′, R″, R′″ can be identical or different and are each hydrogen or a linear or branched saturated hydrocarbon radical having from 1 to 20 carbon atoms in which the hydrocarbon chain may contain O, S and N as heteroatoms and which may be monosubstituted or polysubstituted by hydroxy, thiol or amino groups or halogens.

    摘要翻译: 在式(I)和(II)的催化剂存在下,通过式(II)的烷氧基​​二氢吡喃与水和氢的单步反应制备。在式(I)和(II)中,R,R' R“,R”可以相同或不同,并且各自为氢或具有1至20个碳原子的直链或支链饱和烃基,其中烃链可以含有O,S和N作为杂原子,并且其可以是 被羟基,硫醇或氨基或卤素单取代或多取代。