Regioselective nitration of diphenyl compounds

Details Regioselective nitration of diphenyl compounds Regioselective nitration of diphenyl compounds

1989-03-22

1993-02-16

Prescott, Arthur C.

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

Organic compounds

Carbonate esters

558273, 558274, C07C 7926

Patent

active

051872943

ABSTRACT:
A regioselective nitration process for diphenyl compounds which can be carried out at about ambient temperature in which each ring of the diphenyl compound is selectively nitrated in the para position to form the corresponding di(4-nitrophenyl) compound. Such compounds as diphenyl carbonate, 2,2-diphenylpropane, 2,2-diphenylhexafluoropropane, diphenyl sulfide, diphenyl ketone, diphenyl sulfone, and the like can be converted to an isomeric mixture containing an enhanced amount of the corresponding di(4-nitrophenyl) compound, which mixture may be reduced or purified and reduced to the di(4-aminophenyl) analogues for use in the manufacture of polyamides, polyimides, and polyamide-imides.

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