申请人:Hoechst Aktiengesellschaft
公开号:US04922019A1
公开(公告)日:1990-05-01
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. The 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, (b) nitrating the 2,2-bis-(3-acylamidophenly)-hexafluoropropane, 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, (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 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.
本发明涉及式中化合物 ##STR1## 其中R.sup.1是氢或酰基,该酰基中附着有1至6个碳原子的非芳香烃基,连接到CO基团上,R.sup.2是H或NO.sub.2,如果R.sup.1是酰基,则为NO.sub.2,如果R.sup.1是氢,则为NO.sub.2。本发明还涉及一种制备式中2,2-双-(3,4-二氨基苯基)-六氟丙烷的方法,该方法包括(a)在酰化常规条件下,酰化2,2-双-(3-氨基苯基)-六氟丙烷,以得到一种2,2-双-(3-酰胺基苯基)-六氟丙烷,其酰基不含芳香族基,(b)在硝化常规条件下,硝化2,2-双-(3-酰胺基苯基)-六氟丙烷,以得到2,2-双-(3-酰胺基-4-硝基苯基)-六氟丙烷,(c)在脱酰常规条件下,脱酰2,2-双-(3-酰胺基-4-硝基苯基)-六氟丙烷,以得到2,2-双-(3-氨基-4-硝基苯基)-六氟丙烷,(d)在还原硝基化合物常规条件下,还原该化合物,以得到2,2-双-(3,4-二氨基苯基)-六氟丙烷,(e)分离该化合物或通过将其转化为其盐的溶液进行纯化,通过吸附剂吸附杂质,并通过加入碱沉淀2,2-双-(3,4-二氨基苯基)-六氟丙烷。