Process for preparing 4,6-dinitroresorcinol

Details Process for preparing 4,6-dinitroresorcinol Process for preparing 4,6-dinitroresorcinol

1987-01-07

1988-05-17

Lone, Warren B.

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

Organic compounds

Oxygen containing

568711, C07C 7928

Patent

active

047452323

ABSTRACT:
A method of nitrating resorcinol which is selective for the production of the 4,6-dinitro resorcinal isomer. A resorcinol-based starting material is admixed with a nitrating solution from which substantially all nitrogen dioxide and nitrous has been removed. The nitrating solution contains white fuming nitric acid, a nitrosonium ion control agent such as urea, and, optionally, concentrated sulfuric acid. The 4,6-dinitroresorcinal isomer is provided in yields of about 65-85% with minimal production of undesirable side products.

REFERENCES:
patent: 1380186 (1921-05-01), Brewster
patent: 2945890 (1960-07-01), Allan
patent: 3694513 (1972-09-01), Tobey et al.
patent: 3933926 (1976-01-01), Salter et al.
Fitzpatrick et al., J. Chem. Soc. Perkin Trans. II: 927-932 (1984).

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