Hoechst Celanese Corporation

Other

Wilson B Ray

Kenneth G Davenport

Mohammad Aslam

Ralph R Dammel

Richard Vicari

Juergen Lingnau

Karl-Friedrich Doessel

Anthony J East

Charles B Hilton

Bennett C Ward

3-substituted-4-hydroxy- and 4-acetoxystyrene compounds, especially 3,5-di(methyl, bromo or chloro)-4-acetoxystyrene as well as a process for its preparation. 2,6-dimethylphenol is acylated with acetic anhydride and HF catalyzed to produce 3,5-dimethyl-4-hydroxy-acetophenone. After subsequent esterification with acetic anhydride and catalyzed hydrogenation to form 1-(3',5'-dimethyl-4'-acetoxyphenyl)ethanol, this intermediate is then dehydrated with an acid and a polymerization inhibitor to produce 3,5-dimethyl-4-acetoxystyrene.

Process for the production of 3,5-disubstituted-4-acetoxystyrene

A method is provided for the production of 3,3', 4,4'-tetraaminobiphenyl (TAB) from biphenyl comprising the following steps:

Method for the production of 3,3'4,4'-tetraaminobiphenyl

Thiophenones are produced by acylating the aromatic ring of thiophenolic ethers in the presence of anhydrous hydrofluoric acid. It has been found that if the thio group is in the form of a thioether and not a thiol, the aromatic ring can be acylated to form the thiophenone in the presence of anhydrous hydrofluoric acid.

Process for producing thioalkyl or thioarylphenones

Preparation of 3,5-disubstituted-4-acetoxystyrene

3,5-disubstituted-4-acetoxystyrene and process for its production

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Beeville, TX, United States of America

Wilson B Ray