Process for the preparation of ubihydroquinones and ubiquinones

Details Process for the preparation of ubihydroquinones and ubiquinones Process for the preparation of ubihydroquinones and ubiquinones

2006-08-02

2009-10-13

Witherspoon, Sikarl A (Department: 1621)

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

Organic compounds

Oxygen containing

Reexamination Certificate

active

07601877

ABSTRACT:
A process for the preparation of ubihydroquinones and ubiquinones by condensation of a prenol or isoprenol with a hydroquinone or derivative thereof in the presence of 0.005-1.0 mol % of a catalyst which is a Broensted-acid, a Lewis-acid from the group consisting of a derivative of Bi or In or an element of group 3 of the periodic table of the elements, a heteropolyacid, an NH— or a CH-acidic compound, and optionally oxidizing the ubihydroquinone obtained.

REFERENCES:
patent: 4039573 (1977-08-01), Kijima et al.
International Search Report for PCT/EP2006/007645 mailed Feb. 1, 2007.
Written Opinion for PCT/EP2006/007645 mailed Feb. 1, 2007.

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