Single-stage process for producing bis-(amino-nitrophenyl)-metha

Details Single-stage process for producing bis-(amino-nitrophenyl)-metha Single-stage process for producing bis-(amino-nitrophenyl)-metha

1988-09-06

1991-09-10

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564330, 564332, 564334, 564335, C07C20978

Patent

active

050475916

ABSTRACT:
Bis-(amino-nitrophenyl)-methane can be produced in one stage with an approximately quantitative yield by condensing o-nitraniline and formaldehyde in water at a temperature of between 20.degree. and 40.degree. C. in the presence of sulfuric acid, and subsequently rearranging the formed methylene-bis-(o-nitraniline) by treatment of the reaction mixture at a temperature of between 90.degree. and 100.degree. C.

REFERENCES:
patent: 2818433 (1957-12-01), Erickson
patent: 3097191 (1963-07-01), France et al.
patent: 3274247 (1966-09-01), Repper
patent: 3358025 (1967-12-01), Foster et al.
patent: 3367969 (1968-02-01), Perkins
patent: 3429856 (1969-02-01), Hoeschele
patent: 3476806 (1969-11-01), Wolf

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