Preparation of pyrocatechol monoethers and pyrocatechols

Details Preparation of pyrocatechol monoethers and pyrocatechols Preparation of pyrocatechol monoethers and pyrocatechols

1993-03-02

1994-06-07

Cintins, Marianne M.

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

Organic compounds

Oxygen containing

568652, 568766, 568772, 568650, 568763, C07C 4109, C07C 4128

Patent

active

053191480

ABSTRACT:
The preparation of pyrocatechol monoethers or pyrocatechols of the formula Ia or Ib respectively ##STR1## ( R.sup.1 and R.sup.2 =H or C.sub.1 --C.sub.8 -hydrocarbon radicals; R.sup.3 =C.sub.1 --C.sub.8 -hydrocarbon radical ) by rearranging a 2-hydroxycyclohexanone dialkyl ketal II ##STR2## a) in the gas phase in the presence of a platinmetal or in the presence of a compound of one of these metals as catalyst in order to obtain a compound Ia, or

REFERENCES:
patent: Re29200 (1977-05-01), McKague et al.
patent: 3689570 (1972-09-01), Gradeff et al.
patent: 3801651 (1974-04-01), Adolphen et al.
patent: 3895076 (1975-07-01), Bauer et al.
patent: 4204076 (1980-05-01), Konz et al.
patent: 4254288 (1981-03-01), Gladwin
McOnie, Proctective Groups in Organic Chemistry, pp. 327-328, (1973).
"Hydroquinone and Pyrocatechol Production by Direct Oxidation of Phenol"; Varagnat, Ind. Eng. Chem., Prod. Res. Dev., vol. 15, No. 3, 1976.
Chem. Abst., vol. 82, No. 23, Jun. 9, 1975, p. 558.

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