[2.2] paracyclophane and derivatives thereof
    62.
    发明授权
    [2.2] paracyclophane and derivatives thereof 失效
    [2.2] paracyclophane及其衍生物

    公开(公告)号:US5302767A

    公开(公告)日:1994-04-12

    申请号:US37935

    申请日:1993-03-26

    CPC分类号: C07C1/323 C07C2103/92

    摘要: Processes are disclosed for preparing [2.2] paracyclophane and derivatives thereof by conducting the Hofmann elimination of p-methylbenzyltrimethylammonium hydroxide, or derivatives thereof, in the presence of an effective amount of oxygen to inhibit the formation of by-product polymers. The oxygen can be introduced, for example, by a purge gas stream containing molecular oxygen. Products produced by the processes are also disclosed.

    摘要翻译: 公开了通过在有效量的氧的存在下进行霍夫曼消除对甲基苄基三甲基氢氧化铵或其衍生物来制备[2.2]对环芳烃及其衍生物的方法,以抑制副产物聚合物的形成。 氧可以例如通过含有分子氧的吹扫气流引入。 还公开了由该方法生产的产品。

    Synthesis of cis-olefins
    69.
    发明授权
    Synthesis of cis-olefins 失效
    顺式烯烃的合成

    公开(公告)号:US4922049A

    公开(公告)日:1990-05-01

    申请号:US297640

    申请日:1989-01-13

    申请人: Jim D. Byers

    发明人: Jim D. Byers

    CPC分类号: C07C11/02 C07C1/326

    摘要: A process for the synthesis of cis-olefins from cis-olefinic alcohols consisting essentially of the following steps:(a) reacting a cis-olefinic alcohol with a source of an alkali metal ion selected from the group consisting of lithium and sodium ions to form a first reaction product,(b) then contacting said thus formed first reaction product with a sulfonyl halide compound to form a second reaction product,(c) then containing said thus formed second reaction product with an alkyl magnesium compound and a cuprous salt to form a third reaction product comprising a cis-olefin wherein said steps are carried out in a suitable organic solvent.