Process for the preparation of 4-hydroxy-2,4,6-trimethyl-2,5-cyc

Details Process for the preparation of 4-hydroxy-2,4,6-trimethyl-2,5-cyc Process for the preparation of 4-hydroxy-2,4,6-trimethyl-2,5-cyc

1985-03-19

1986-09-16

Reamer, James H.

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

Organic compounds

Oxygen containing

568779, C07C 4542

Patent

active

046124012

ABSTRACT:
4-Hydroxy-2,4,6-trimethyl-2,5-cyclohexadienone is made by chlorinating 2,4,6-trimethylphenol with chlorine in an organic solvent in the absence of base while the hydrogen chloride formed is removed as it is formed by physical means and hydrolyzing the reaction mixture with water optionally in the presence of an inorganic base.

REFERENCES:
patent: 3895069 (1975-07-01), Atkinson et al.
patent: 3928453 (1975-12-01), Atkinson
patent: 3932475 (1976-01-01), Miyazaki et al.
patent: 4284830 (1981-08-01), Knudsen et al.
patent: 4477682 (1984-10-01), Tomita et al.
patent: 4489210 (1984-12-01), Judat et al.
Lamartine et al, J. Org. Chem., vol. 39, pp. 1744-1747 (1974).
Acga Chmica Scandinavica (1982) B36, pp. 675-683, K-E Bergquist et al.; "Electrophilic Chlorination of 4 Methylphenals with Molecular Chlorine, Synthesis of Dimethoxy Aromatics by Methanalysis of 4-Chloro-4-Methylcyclochexa-2,5-Dienones," pp. 675, 678, 682.
Patents Abstracts of Japan, vol. 7, No. 219 (c.188) (1364), Sep. 29, 1983 & JP-A-58-116.435 (Mitsubishi Yas Kagaku K.K.) resume.

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