Process for the isomerization of derivatives of 3-vinyl-piperidine
    2.
    发明授权
    Process for the isomerization of derivatives of 3-vinyl-piperidine 失效
    3-乙烯基哌啶衍生物的异构化方法

    公开(公告)号:US4238612A

    公开(公告)日:1980-12-09

    申请号:US22544

    申请日:1979-03-21

    CPC classification number: C07D211/34 C07D211/12 C07D211/22

    Abstract: A process for the conversion of compounds of the formula: ##STR1## in which R is a hydrogen atom or a substituent and for which the carbon carrying the vinyl group has the rectus configuration, into the corresponding compounds of formula (I) for which the carbon carrying the vinyl group has the sinister configuration, and vice versa, which comprises subjecting a compound of formula (I) for which the carbon carrying the vinyl group has the rectus or sinister configuration, partially or entirely salified, to a heating at a temperature above 50.degree. C. in a protic solvent or a mixture of protic solvents in the presence or absence of formaldehyde, and isolating the compound of formula (I) for which the carbon carrying the vinyl group has the sinister or rectus configuration thus formed.

    Abstract translation: 将式(I)化合物转化成式(I)化合物的方法,其中R是氢原子或取代基并且带有乙烯基的碳具有直链构型, 其中携带乙烯基的碳具有阴性构型,反之亦然,其中包括使带有乙烯基的碳直接或阴性构型的部分或全部成盐的式(I)化合物加热 在质子溶剂或质子溶剂的混合物中,在存在或不存在甲醛的情况下,在高于50℃的温度下,分离出其中携带乙烯基的碳具有阴性或直肠构型的式(I)化合物,因此 形成。

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