Process for producing 2-methoxybenzanthrones

Details Process for producing 2-methoxybenzanthrones Process for producing 2-methoxybenzanthrones

1981-10-09

1983-11-08

Gantz, Delbert E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260364, C07C 5022

Patent

active

044141564

ABSTRACT:
The invention relates to a novel process for producing 2-methoxybenzanthrones, starting with 1-aminoanthraquinones, which process is characterized in that, by application of a special reaction medium, namely a dimethylalkanephosphonate, which at the same time acts as a methylation agent in one of the reaction steps, the reaction is performed from beginning to end according to the principle of the single-vessel reaction, that is to say, without isolation of intermediates.
The 2-methoxybenzanthrones obtained by this process are important intermediate products for vat dyes.

REFERENCES:
patent: 4036859 (1977-07-01), Ribaldone et al.
patent: 4296043 (1981-10-01), Schroeder

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