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1. 发明公开

EP0254976A1 Process for the preparation of vinyl ethers 失效
标题翻译： Verfahren zur Herstellung vonVinyläthern。
公开(公告)号：EP0254976A1
公开(公告)日：1988-02-03
申请号：EP87110281.0
申请日：1987-07-16
申请人： ENICHEM ANIC S.p.A.
发明人： Messina, Giuseppe , Moretti, Mario Domenico , Sanna, Salvatore Roberto , Soma, Giovanni , Cabras, Pier Gianni
IPC分类号： C07C43/16 , C07C43/166 , C07C45/88 , C07C41/28
CPC分类号： C07C41/01 , C07C2601/16 , C07C43/17 , C07C43/188 , C07C43/166
摘要： A process for the synthesis of vinyl ethers of formula I
wherein
R₁ and R₂, each independently, represent hydrogen or a primary, secondary or tertiary alkyl group,
R₃ is hydrogen, a primary alkyl, phenyl, or substituted phenyl group, or
R₂ and R₃, taken together, represent a polymethylene chain containing from 3 to 10 carbon atoms wherein one or more hydrogens can be replaced by methyl or ethyl groups, and
R is a primary, secondary or tertiary alkyl group, which comprises reacting a suitably selected dioxolane derivative of formula II
wherein
R₁, R₂, and R₃ are as defined above, and
R₄, R₅, R₆, and R₇, each independently, represent hydrogen or an alkyl group,
with a boric acid ester of formula III
B(OR)₃ III
wherein
R is as defined above,
in the vapor phase, at a temperature comprised between 100 and 400 °C, and in the presence of an acidic heterogeneous catalyst.
摘要翻译：用于合成式I的乙烯基醚的方法其中R 1和R 2各自独立地表示氢或伯，仲或叔烷基，R 3是氢，伯烷基，苯基或取代的苯基，或 R2和R3一起表示含有3至10个碳原子的多亚甲基链，其中一个或多个氢可以被甲基或乙基代替，并且R是伯，仲或叔烷基，其包括使适当选择的式II的二氧杂环戊烷衍生物其中R 1，R 2和R 3如上所定义，并且R 4，R 5，R 6和R 7各自独立地代表氢或烷基，与式IIIB的硼酸酯（ OR）3 III，其中R如上所定义，在气相中，在100-400℃的温度下和在酸性多相催化剂存在下。

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