Process for the preparation of 5-nitro-1,4-naphthoquinone

Details Process for the preparation of 5-nitro-1,4-naphthoquinone Process for the preparation of 5-nitro-1,4-naphthoquinone

1986-10-22

1989-11-14

Lone, Werren B.

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

Organic compounds

Cyclohexadiene having atoms double bonded directly at the 1-...

C07C 5012, C07L 5000

Patent

active

048805718

ABSTRACT:
A process for the preparation of 5-nitro-1,4-naphthoquinones of formula ##STR1## wherein R is hydrogen, a C.sub.1 -C.sub.4 alkyl radical or a C.sub.1 -C.sub.4 alkoxy radical, by oxidation of 1-nitronaphthalene or a suitably substituted 1-nitronaphthalene, which process comprises carrying out the reaction with manganese(III) sulfate as oxidizing agent or a mixture of manganese(III) sulfate and cerium sulfate.
The maganese(III) sulfate consumed can be regenerated electrolytically with good current yield. The process is environmentally safe, as the oxidizing agent and the solvent, if any, can be reused.

REFERENCES:
patent: 3873580 (1975-03-01), Rennie
Chemical Abstracts vol. 55, 1547-8.
Ullmanns Encyklopadie der technischen Chemie 4. (4th Edition), neubearbeitete und erweiterte.
Auflage, Band 17 (vol. 17), milchsaure bis Petrolkoks (1979), pp. 121 & 392.
Chemical Abstracts (25 Benzenes) vol. 98, (1983), p. 521.
Chemical Abstract vol. 95(1981), pp. 671, 61677j.

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