Method for producing trimethylhydroquinone diester

Details Method for producing trimethylhydroquinone diester Method for producing trimethylhydroquinone diester

1997-12-17

1999-06-01

Geist, Gary

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

Organic compounds

Carboxylic acid esters

560231, 568341, 568763, C07C 6748

Patent

active

059089563

ABSTRACT:
This method provides trimethylhydroquinone diester by using a recyclable catalyst which shows high activity and operability in the reaction, while reducing the risk of corrosion of the reactor. The method for the production of 2,5,6-trimethylhydroquinone diester comprises reacting 2,6,6-trimethylcyclohexe-2-en-1,4-dione with an acylating agent in the presence of a solid catalyst. The acylating agent includes a C.sub.2-4 carboxylic acid anhydride (e.g. acetic anhydride) and a C.sub.2-4 carboxylic acid halide (e.g. acetyl chloride). The solid catalyst includes a solid acid catalyst (e.g. strongly or super-strongly acidic ion exchange resin, compound oxide, zeolite, heteropoly acid).

REFERENCES:
Corma et al, Journal of Catalysis, vol. 120, pp. 78-87, 1989.

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