Hydroxylation of phenolic compounds

Details Hydroxylation of phenolic compounds Hydroxylation of phenolic compounds

1993-04-05

1995-05-09

Evans, Joseph E.

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

Organic compounds

Oxygen containing

558271, 560 61, 564179, 568 23, 568629, 568650, 568723, 568733, 568737, 568765, 568766, C07C 3760, C07C 3908, C07C 3916, C07C 3927

Patent

active

054141532

ABSTRACT:
Phenolic compounds, e.g., the phenols and phenol ethers, are selectively hydroxylated whereby the amounts of the final product para isomer are enhanced, for example in favor of hydroquinone versus pyrocatechol in the event of the hydroxylation of phenol, by reacting such phenolic compounds with hydrogen peroxide, advantageously in a polar, aprotic, organic solvent reaction medium, in the presence of a catalytically effective amount of a sulfonated polymer and a cocatalytically effective amount of an aromatic ketone compound.

REFERENCES:
patent: 4078006 (1978-03-01), Umemura et al.
patent: 4174460 (1979-11-01), Seifert et al.
Chemical Abstracts, vol. 79, No. 5, Aug. 6, 1973, abstract No. 31665f, Inoue et al, "Oxidation of Phenol", p. 423, col. 2; & JP-A-73 036 130 (Toa Gosei Chemical Industry Co.) May 28, 1973.

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