Preparation of 3,5-disubstituted-4-acetoxystyrene

Details Preparation of 3,5-disubstituted-4-acetoxystyrene Preparation of 3,5-disubstituted-4-acetoxystyrene

1988-08-02

1990-10-23

Lone, Werren B.

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

Organic compounds

Carboxylic acid esters

560142, 560231, 560239, 568337, 568774, C07C 6700

Patent

active

049654004

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.

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Packham, Journal of Chemical Society, pp. 2617-2624, (1964).
Turner et al; Polymer Engineering and Science, vol. 26, No. 16, Sep. 1986, pp. 1096-1100.
Hewgill et al., Journal of Polymer Science, vol. 14, pp. 463-465 (1976).

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