Process for preparing anthraquinone

Details Process for preparing anthraquinone Process for preparing anthraquinone

1975-07-09

1976-12-21

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 100

Patent

active

039988570

ABSTRACT:
Anthraquinones are prepared by reacting a 1,4-naphthoquinone with trans-1-acetoxybutadiene in a polar solvent at a temperature of from 30.degree. to 60.degree. C, optionally in the presence of acetic acid. 1-acetoxy-1,4,4a,9a-tetrahydroanthraquinone is produced which is then treated with oxygen at temperatures of 100.degree. to 130.degree. C without isolation, optionally after adding a salt of acetic acid or a compound which forms an acetic acid salt under the reaction conditions.

REFERENCES:
patent: 2072867 (1937-03-01), Carothers
patent: 2938913 (1960-05-01), Weyker et al.
patent: 3870730 (1975-03-01), Scharfe et al.

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