Process for α,β-dihydroxyalkenes and derivatives
    4.
    发明授权
    Process for α,β-dihydroxyalkenes and derivatives 失效
    α,β-二羟基烯醇和衍生物的方法

    公开(公告)号:US07199252B2

    公开(公告)日:2007-04-03

    申请号:US11204786

    申请日:2005-08-16

    IPC分类号: C07D317/38

    摘要: Disclosed is a process wherein a first olefin selected from certain α,β-dihydroxyalkenes and 4-(alkenyl)ethylenecarbonates is reacted with a second olefin reactant to produce an olefin metathesis product. When the first olefin reactant is an optically enriched or enantiomerically pure α,β-dihydroxyalkene, cross metathesis reactions produce products possessing the same optical purity. The α,β-dihydroxyalkenes and the 4-(alkenyl)ethylene carbonates may be converted to hydrogenated products, and the 4-(alkenyl)ethylenecarbonates may be decarboxylated to provide the corresponding epoxides. The products of the disclosure may be used as monomers for the preparation of specialty polyesters and as intermediates in the manufacture pharmaceuticals and other chemicals.

    摘要翻译: 公开了一种方法,其中选自某种α,β-二羟基烯烃和4-(链烯基)亚乙基碳酸酯的第一种烯烃与第二种烯烃反应物反应以产生烯烃复分解产物。 当第一种烯烃反应物是光学富集或对映体纯的α,β-二羟基亚油,交叉复分解反应产生具有相同光学纯度的产物。 α,β-二羟基烯烃和4-(烯基)亚乙基碳酸酯可以转化为氢化产物,并且4-(烯基)亚乙基碳酸酯可以脱羧以提供相应的环氧化物。 本公开的产品可以用作制备特种聚酯的单体和作为制造药物和其它化学品的中间体。

    Process for the preparation of alkanoyloxy-benzenesulfonic acids and salts thereof
    9.
    发明授权
    Process for the preparation of alkanoyloxy-benzenesulfonic acids and salts thereof 有权
    烷酰氧基 - 苯磺酸及其盐的制备方法

    公开(公告)号:US06218555B1

    公开(公告)日:2001-04-17

    申请号:US09543950

    申请日:2000-04-06

    IPC分类号: C07C5300

    摘要: Disclosed is a process for the preparation of alkanoate esters of hydroxybenzenesulfonic acids and salts thereof by the steps of (1) contacting or reacting phenol with an alkanoic acid in the presence of trifluoroacetic acid (TFA) and trifluoroacetic anhydride (TFAA) to produce a aryl alkanoate ester and (2) contacting the reaction mixture of step (1) with a sulfonating agent to convert the aryl alkanoate ester to an alkanoate ester of hydroxybenzenesulfonic acid. The process provides the economic advantage inherent in using the product of esterification of step (1) without Disolation in the sulfonation of step (2).

    摘要翻译: 公开了通过以下步骤制备羟基苯磺酸的链烷酸酯及其盐的方法:(1)在三氟乙酸(TFA)和三氟乙酸酐(TFAA)存在下使苯酚与烷酸接触或反应,生成芳基 链烷酸酯和(2)使步骤(1)的反应混合物与磺化剂接触以将芳基链烷酸酯转化为羟基苯磺酸的链烷酸酯。 该方法提供了在步骤(2)的磺化中使用步骤(1)的酯化产物而没有分离的固有的经济优点。