Process for the preparation of optionally p-chlorine-substituted

Details Process for the preparation of optionally p-chlorine-substituted Process for the preparation of optionally p-chlorine-substituted

1982-01-21

1984-01-17

Shaver, Paul F.

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

Organic compounds

Amino nitrogen containing

C07C 8511

Patent

active

044265387

ABSTRACT:
The invention relates to a process for the preparation of optionally p-chlorine-substituted 2,6-diaminotoluene, which is characterized in that 3,4-dichlorotoluene is dinitrated in the presence of an inert, water-immiscible, organic solvent and/or diluent at temperatures of -10.degree. to +100.degree. C. and is subsequently reduced, optionally after intermediate isolation of the dinitro compound, in the presence of an inert organic solvent and/or diluent and/or of water, with partial or complete splitting-off of the chlorine atoms, to give the diamino compound.
2,6-Diaminotoluenes are valuable intermediates for the preparation of diisocyanates and polyurethanes; the 2,6-diaminotoluene is furthermore used for the preparation of dyestuffs and antioxidants.

REFERENCES:
patent: 3474144 (1969-10-01), Craig et al.
patent: 3546297 (1970-12-01), Kosak
patent: 3666813 (1972-05-01), Hindin et al.
patent: 3683025 (1972-08-01), Pons
patent: 3888929 (1975-06-01), Rivier
patent: 3989756 (1976-11-01), Fujise et al.
patent: 4206148 (1980-06-01), Biola et al.
"J. Ind. Chem. Soc.", No. 5, pp. 331 to 334, 1959.

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