Method for the preparation of 2,3,5-trimethylbenzoquinone

Details Method for the preparation of 2,3,5-trimethylbenzoquinone Method for the preparation of 2,3,5-trimethylbenzoquinone

1989-03-03

1993-09-14

Dees, Jose G.

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

Organic compounds

Cyclohexadiene having atoms double bonded directly at the 1-...

C07C 5004

Patent

active

052450597

ABSTRACT:
2,3,5-Trimethyl-p-benzoquinone is prepared advantageously by the catalytic oxidation of 2,3,5- or 2,3,6-trimethylphenol with hydrogen peroxide in an organic solvent, which is preferably acetic acid, in the presence of a catalyst which is a heteropolyacid of silicon or phosphorus as the center atom selected from phosphomolybdic acid, silicomolybdic acid, phosphotungstic acid and silicotungstic acid. The reaction proceeds rapidly even at room temperature to give the product in a high yield so that the method is industrially advantageous in addition to the advantages in respect of the inexpensiveness of the reactants and catalyst and absence of any noxious byproducts which may cause environmental pollution.

REFERENCES:
patent: 4482493 (1984-11-01), Matsumoto et al.
patent: 5041572 (1991-08-01), Hoercher et al.
patent: 5104996 (1992-04-01), Hirose et al.
Korenskii et al., Zh. Obshch. Khim., vol. 55 (1985) pp. 1750-1754.

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