Process for the preparation of 1-substituted anthraquinones

Details Process for the preparation of 1-substituted anthraquinones Process for the preparation of 1-substituted anthraquinones

1974-10-25

1976-06-29

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260380, C07C 8511, C07C 8900

Patent

active

039667758

ABSTRACT:
A process for the preparation of 1-substituted anthraquinones represented by the general formula I ##EQU1## where, in the formula, R.sub.1 and R.sub.2 represent individually a hydrogen atom or methyl group and X represents a hydroxylamino or amino group,
Which comprises treating in a liquid medium a 5-nitro-1,4,4a,9a-tetrahydroanthraquinone represented by the general formula II ##EQU2## where, in the general formula, R.sub.1 and R.sub.2 represent individually a hydrogen atom or methyl group,
In the presence of a basic compound with or without a reducing agent.

REFERENCES:
patent: 2276637 (1942-03-01), Zahn et al.
patent: 2570866 (1951-10-01), Sargent et al.
patent: 2607782 (1952-08-01), Seymour et al.
patent: 3417090 (1968-12-01), Pelster et al.

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