Derivatives of 2,2-bis-(3-aminophenyl)hexafluoropropane and process for the preparation of 2,2-bis-(3,4-diaminophenyl) hexafluoropropane

摘要

The invention relates to compounds of the formula ##STR1## wherein R. sup.1 is hydrogen or an acyl group in which a non-aromatic hydrocarbon group of 1 to 6 carbon atoms is attached to the CO-group and R.sup.2 is H or NO.sub.2, if R.sup.1 is an acyl group, or is NO.sub.2, if R.sup.1 is hydrogen.PPThe invention further relates to a process for the production of 2,2-bis-(3,4-diaminophenyl)- hexafluoropropane of the formula ##STR2## which comprises (a) acylating 2, 2-bis-(3-aminophenyl)- hexafluoropropane, under conditions conventional for acylations, to yield a 2,2-bis-(3-acylamidophenyl)-hexafluoropropane, the acyl group of which is free from aromatic groups,PP(b) nitrating the 2,2-bis- (3-acylamidophenly)-hexafluoropropane, under conditions conventional for nitrations, to yield 2,2-bis-(3-acylamido-4- nitrophenyl)- hexafluoropropane,PP(c) deacylating the 2,2- bis-(3- acylamido-4-nitrophenyl)-hexafluoropropane, under conditions conventional for deacylations, to yield 2,2-bis-(3-amino-4-nitrophenyl)- hexafluoropropane,PP(d) reducing this compound, under conditions conventional for the reduction of nitro compounds, to yield 2, 2-bis-(3,4-diaminophenyl)-hexafluoropropane, andPP(e) isolating this compound or subjecting it to a purificaton by converting it into a solution of one of its salts, adsorbing contaminations at an adsorption agent and recipitating the 2,2-bis-(3,4-diaminophenyl)- hexafluoropropane by addition of a base.