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    Production of aromatic thioethers
    4.
    发明授权
    Production of aromatic thioethers 失效
    芳香族硫醚的生产

    公开(公告)号：US3134818A

    公开(公告)日：1964-05-26

    申请号：US16964762

    申请日：1962-01-29

    Applicant: ALLIED CHEM

    Inventor： FARAH BASIL S ,  GILBERT EVERETT E

    IPC: C07C319/14 ,  C07C323/20 ,  F21V11/16

    CPC classification number: C07C319/14 ,  C07C323/00 ,  F21S41/43 ,  C07C323/20

    Abstract: Alkylmercaptophenols are produced by reacting a phenol having a free 2- or 4-position with a dialkyl disulphide in presence of sulphonic acid as a catalyst, the mol. ratio catalyst: dialkyl disulphide being not more than 0.25:1. The sulphonic acid may be obtained by addition of sulphuric acid to the phenol starting material, or methane-, ethane-, benzene- or toluene-sulphonic acids or sulphonated styrene-divinylbenzene copolymer may be used. The disulphides preferably contain C1-5 alkyl groups. In examples, the method of the invention is applied to the production of 2- and 4-methyl- and ethylmercaptophenols; the 4-methylmercapto derivatives of 3-methoxy, methyl, -ethyl- and -isopropylphenols, 3,5-dimethyl- and -diisopropylphenols, 2 (or 3)-methyl-, 5 (or 6)-isopropyl phenols, 2-phenylphenol and 1-naphthol; the 2-methyl-mercapto-derivatives of 4-methyl- and 4-chlorophenols; 4-ethylmercapto-3-methylphenol and 4-n- or i-butyl or -amyl-mercaptophenols. Other phenols suitable as starting materials are also mentioned.

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