1-Alkyl-substituted-1,2,3,4-tetrahydroanthraquinones

Details 1-Alkyl-substituted-1,2,3,4-tetrahydroanthraquinones 1-Alkyl-substituted-1,2,3,4-tetrahydroanthraquinones

1974-03-14

1976-06-08

Demers, Arthur P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

423588, C07C 4968

Patent

active

039622886

ABSTRACT:
1-Alkyl and 1,3-dialkyl substituted-1,2,3,4-tetrahydroanthraquinone are provided which may also be alkyl substituted in the 6- and/or 7- position. These compounds are provided by condensing a naphthoquinone with an alkyl-substituted butadiene dimer, catalytically hydrogenating the adduct, then oxidizing the resulting hexahydro compound to the desired tetrahydroanthraquinone. Alternatively, the condensation product may be oxidized with a cupric compound or with air plus a weak base, and this compound catalytically hydrogenated and then oxidized to the corresponding tetrahydroanthraquinone. The compounds of this invention exhibit superior solubility in solvents commonly used in the cyclic process for manufacturing H.sub.2 O.sub. 2 and thus enhance H.sub. 2 O.sub.2 production.

REFERENCES:
patent: 2495229 (1950-01-01), Dawsey et al.
patent: 2657980 (1953-11-01), Sprauer
patent: 2867507 (1959-01-01), Gleason et al.
patent: 3041143 (1962-06-01), Dawsey et al.
patent: 3073680 (1963-01-01), Jenney et al.
patent: 3307909 (1967-03-01), Reilly
Beilstein, Handbuch der Organischem Chemie, vol. 7(II), 1948, pp. 666-669.

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