Aqueous synthesis of 2-halo-4,6-dinitroresorcinol and 4,6-diamin

Details Aqueous synthesis of 2-halo-4,6-dinitroresorcinol and 4,6-diamin Aqueous synthesis of 2-halo-4,6-dinitroresorcinol and 4,6-diamin

1989-11-17

1991-03-19

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568712, 568713, C07C20526

Patent

active

050012797

ABSTRACT:
The displacement of halogen from a 1,2,3-trihalo-4,6-dinitroresorcinol can be carried out in an aqueous medium using alkali metal hydroxide to form 2-halo-4,6,-dinitroresorcinol. The product is a useful intermediate in the synthesis of 4,6-diaminoresorcinol, which is a monomer for polybenzoxazole polymers. The process from part of a useful aqueous process for synthesizing 4,6-diaminoresorcinol.

REFERENCES:
patent: 3726929 (1973-04-01), Payne et al.
patent: 4001340 (1977-01-01), Smith et al.
patent: 4766244 (1988-08-01), Lysenko et al.
patent: 4835306 (1989-05-01), Lysenko

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