Preparation of aromatic and heteroaromatic carboxylic acids by catalytic ozonolysis
    1.
    发明授权
    Preparation of aromatic and heteroaromatic carboxylic acids by catalytic ozonolysis 失效
    通过催化臭氧分解制备芳香族和杂芳族羧酸

    公开(公告)号:US07371866B2

    公开(公告)日:2008-05-13

    申请号:US10437994

    申请日:2003-05-15

    摘要: A process for catalytically oxidizing alkylaromatic compounds of the formula (I) Ar—CH2—R where Ar is an optionally substituted, aromatic or heteroaromatic 5-membered or 6-membered ring or a ring system having up to 20 carbon atoms where Ar may optionally be fused to a C1-C6-alkyl group in which up to 2 carbon atoms may be replaced by a heteroatom, and R is hydrogen, phenyl, benzyl or heteroaryl, where the phenyl, benzyl or heteroaryl radicals may also be joined to Ar by a bridge, or R together with Ar forms an optionally substituted ring system which may contain one or more optionally substituted heteroatoms, to the corresponding aromatic or heteroaromatic carboxylic acids in a solvent with ozone in the presence of a transition metal catalyst and optionally in the presence of an acid at a temperature between −70° C. and 110° C. to the corresponding carboxylic acid.

    摘要翻译: 用于催化氧化式(I)的烷基芳族化合物的方法<?in-line-formula description =“In-line Formulas”end =“lead”→Ar-CH 2 -R < 在线公式描述=“在线公式”end =“tail”?>其中Ar是任选取代的芳族或杂芳族5元或6元环或具有至多20个碳原子的环系,其中Ar 可以任选地与C 1 -C 6 - C 6 - 烷基稠合,其中最多2个碳原子可以被杂原子代替,并且R是氢,苯基,苄基 或杂芳基,其中苯基,苄基或杂芳基也可以通过桥连接到Ar,或者R与Ar一起形成可以含有一个或多个任选取代的杂原子的任选取代的环系统到相应的芳族或杂芳族羧酸 在含有过渡金属催化剂的臭氧的溶剂中,任选在酸存在下,在-70℃至110℃的温度下进行。 到相应的羧酸。