Manufacture of macrocyclic polyethers
    2.
    发明授权
    Manufacture of macrocyclic polyethers 失效
    大环聚醚的制造

    公开(公告)号:US4435582A

    公开(公告)日:1984-03-06

    申请号:US252648

    申请日:1981-04-09

    IPC分类号: C07D323/00 C07D319/12

    CPC分类号: C07D323/00

    摘要: This invention deals with a process for the preparation of macrocyclic polyethers of the general formula: ##STR1## wherein x is 1-9; k is 0 or 1 and each R, which may be the same or different, represents a hydrogen atom or a lower alkyl or aryl group, or two R bonded to two adjacent carbon atoms form together with these carbon atoms a cyclic hydrocarbyl configuration, by reacting a compound of the general formula: ##STR2## with a sulphonyl halide in the presence of a base and a halogen-containing solvent, preferably chlorobenzene. The process is of special interest for the manufacture of 18-crown-6.

    摘要翻译: 本发明涉及制备通式如下的大环聚醚的方法:其中x为1-9; k为0或1,并且每个R可以相同或不同,表示氢原子或低级烷基或芳基,或两个与两个相邻碳原子键合的R与这些碳原子一起形成环状烃基构型,由 在碱和含卤素的溶剂,优选氯苯的存在下,使通式为:的化合物与磺酰卤反应。 这个过程对于18-crown-6的制造是特别有意义的。

    Process for the preparation of a polysaccharide in oil dispersion and
dispersion obtained thereby
    3.
    发明授权
    Process for the preparation of a polysaccharide in oil dispersion and dispersion obtained thereby 失效
    用于制备油分散体中的多糖的方法和由此获得的分散体

    公开(公告)号:US4803264A

    公开(公告)日:1989-02-07

    申请号:US934981

    申请日:1986-11-25

    摘要: The invention provides a process for the preparation of a polysaccharide in oil dispersion which comprises the steps of(a) forming a water-in-oil emulsion by dispersing in oil an aqueous solution of polysaccharide, in the presence of at least one dispersion promoter,(b) drying the resulting emulsion azeotropically, and(c) physically isolating from the resulting azeotropically dried residue an oil phase containing oil and dispersion promoter and a polysaccharide in oil dispersion in the form of a suspension phase containing polysaccharide, dispersion promotor and oil;and a polysaccharide in oil dispersion prepared by the process containing 40 to 50% w/w polysaccharide and 3 to 4.5% w/w of at least one dispersion promoter.

    摘要翻译: 本发明提供了一种制备油分散体中的多糖的方法,其包括以下步骤:(a)通过在至少一种分散促进剂存在下,将多糖的水溶液分散在油中形成油包水乳液, (b)共沸干燥所得乳液,和(c)从所得共沸干燥残余物物理分离含有油和分散促进剂的油相和油分散体中含有多糖,分散促进剂和油的悬浮相形式的多糖; 以及通过包含40至50%w / w多糖和3至4.5%w / w的至少一种分散促进剂的方法制备的油中分散多糖。