3,3',5,5'-Tetra-substituted diphenoquinone from 2,6-disubstitute

Details 3,3',5,5'-Tetra-substituted diphenoquinone from 2,6-disubstitute 3,3',5,5'-Tetra-substituted diphenoquinone from 2,6-disubstitute

1976-07-08

1978-04-25

Garner, Vivian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 4516, C07C 4962

Patent

active

040862534

ABSTRACT:
3,3',5,5'-Tetra-substituted diphenoquinone, such as 3,3',5,5'-tetra-t-butyl-4,4'-diphenoquinone, is efficiently prepared by a process comprising contacting oxygen with a liquid 2,6-disubstituted phenol, such as 2,6-di-t-butylphenol in the presence of aqueous base and a catalytic amount of a phase-transfer catalyst, such as tri-n-butylmethylammonium chloride. This process is characterized by high yields, short reaction times and facile product recovery.

REFERENCES:
patent: 2785188 (1957-03-01), Coe
patent: 2905674 (1959-09-01), Filbey

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