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    • 61. 发明授权
    • Preparation of vinyl ethers
    • 乙烯基醚的制备
    • US4891451A
    • 1990-01-02
    • US213589
    • 1988-06-30
    • Wolfgang HoelderichNorbert GoetzLeopold Hupfer
    • Wolfgang HoelderichNorbert GoetzLeopold Hupfer
    • C07C41/28
    • C07C41/28C07C2101/14Y02P20/582
    • Vinyl ethers of the formula (I) ##STR1## where R.sup.1 to R.sup.3 are identical or different and are each hydrogen, a straight-chain or branched alkyl or alkenyl radical of not more than 12 carbon atoms, halogen-substituted alkyl, a cycloalkyl or cycloalkenyl radical of 5 to 8 carbon atoms, an aryl, alkylaryl, alkenylaryl, aralkyl or aralkenyl radical of 6 to 16 carbon atoms, halogen-substituted aryl or a heterocyclic radical and furthermore R.sup.1 and R.sup.2 or R.sup.1 and R.sup.3, together with the carbon atom to which they are bonded, may form a cycloalkane, cycloalkene or heterocyclic structure, and R.sup.4 is alkyl, alkylaryl or aralkyl, are prepared by a process in which an alcohol is eliminated from an acetal or ketal of the formula (II) ##STR2## where R.sup.1 to R.sup.4 have the above meanings, in the presence of borosilicate and/or iron silicate zeolites as catalysts.
    • 式(I)的乙烯基醚其中R 1至R 3相同或不同并且各自为氢,不超过12个碳原子的直链或支链烷基或烯基,卤素取代的烷基, 5至8个碳原子的环烷基或环烯基,6至16个碳原子的芳基,烷基芳基,烯基芳基,芳烷基或芳烯基,卤素取代的芳基或杂环基,此外R1和R2或R1和R3连同 其键合的碳原子可以通过其中从式(II)的缩醛或缩酮中除去醇的方法制备环烷烃,环烯烃或杂环结构,并且R 4是烷基,烷基芳基或芳烷基, 在有硼硅酸盐和/或铁硅酸盐沸石作为催化剂的情况下,R1至R4具有上述含义的图像(II)。