C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/597.5, 260/5
C07C 211/56 (2006.01) B01J 23/42 (2006.01) B01J 23/70 (2006.01) C07B 61/00 (2006.01) C07C 211/52 (2006.01) C07C 233/15 (2006.01) C07D 239/86 (2006.01)
Patent
CA 1300168
87/F 189 Abstract The invention relates to compounds of the formula Image wherein R1 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 R2 is H or NO2, if R1 is an acyl group, or is NO2, if R1 is hydrogen. The invention further relates to a process for the production of 2,2-bis-(3,4-diaminophenyl)-hexafluoropropane of the formula Image 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, b) nitrating the 2,2-bis-(3-acylamidophenyl)-hexafluoro- propane, under conditions conventional for nitrations, to yield 2,2-bis-(3-acylamido-4-nitrophenyl)- hexafluoropropane, 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, 23221-4509 d) reducing this compound, under conditions conventional for the reduction of nitro compounds, to yield 2,2-bis-(3,4- diaminophenyl)-hexafluoropropane, and e) isolating this compound or subjecting it to a puri- fication by converting it into a solution of one of its salts, adsorbing contaminations at an adsorption agent and precipitating the 2,2-bis-(3,4-diaminophenyl)-hexafluoropropane by addition of a base. The compound so produced is useful as a monomer building block for polymers.
570967
Lau Jurgen
Siegemund Gunter
Fetherstonhaugh & Co.
Hoeschst Aktiengesellschaft
Lau Jurgen
Siegemund Gunter
LandOfFree
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