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

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

1990-07-26

1991-12-10

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560142, 560231, 560239, 560250, 560251, 560252, 560254, 568337, C07C 6700

Patent

active

050720252

ABSTRACT:
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.

REFERENCES:
patent: 2276138 (1942-03-01), Alderman et al.
patent: 2687422 (1954-08-01), Overberger
patent: 3624134 (1971-11-01), Kablaoui
patent: 3970534 (1976-07-01), Fujiwara et al.
patent: 4451676 (1984-05-01), Everly
patent: 4927956 (1990-05-01), Vicari et al.
patent: 4965400 (1990-10-01), Vicari et al.

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