Process for the preparation of diaminoresorcinol
AssigneeThe Dow Chemical Company
InventorsZenon Lysenko, Richard G. Pews
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Abstract
The present invention relates to a method of preparing 4,6-diaminoresorcinol from 1,2-dichloro-3,5-dinitrobenzene comprising the steps of: (a) contacting 1,2-dichloro-3,5-dinitrobenzene with a hydroperoxide in the presence of anhydrous base to form 2,3-dichloro-4,6-dinitrophenol; (b) contacting 2,3-dichloro-4,6-dinitrophenol with a hydroxy-containing compound to form 2-chloro-4,6-dinitroresorcinol; and (c) converting 2-chloro-4,6-dinitroresorcinol to 4,6-diaminoresorcinol, which is isolated as a salt or other stabilized form thereof,
Claims17
A method of preparing 4,6-diaminoresorcinol from 1,2-dichloro-3,5-dinitrobenzene comprising the steps of:
- (a) contacting 1,2-dichloro-3,5-dinitrobenzene with a hydroperoxide in the presence of anhydrous base to form 2,3-dichloro-4,6-dinitrophenol;
- (b) contacting 2,3-dichloro-4,6-dinitrophenol with an hydroxy containing compound to form 2-chloro-4,6-dinitroresorcinol;
- and
- (c) hydrogenating 2-chloro-4,6-dinitroresorcinol to 4,6-diaminoresorcinol, which is isolated as a salt or other stabilized form thereof.
Dependencies are inferred from the claim text.