申请人:Hoechst Aktiengesellschaft
公开号:US05831128A1
公开(公告)日:1998-11-03
The present invention relates to a process for the preparation of aromatic amines of the formula (I) Ar--NR.sup.1 R.sup.2 (I) in which Ar is ##STR1## and R.sup.3 to R.sup.9 independently of one another are hydrogen, C.sub.1 -C.sub.8 -alkyl, alkoxy-(C.sub.1 -C.sub.8), acyloxy-(C.sub.1 -C.sub.8), OAr, Ar, fluorine, chlorine, bromine, iodine, OH, NO.sub.2, CN, CO.sub.2 H, CHO, SO.sub.3 H, SO.sub.2 R, SOR, NH.sub.2, NH-alkyl-(C.sub.1 -C.sub.12), N-alkyl.sub.2 -(C.sub.1 -C.sub.12), NHCO-alkyl-(C.sub.1 -C.sub.12), CO-alkyl-(C.sub.1 -C.sub.12), NHCHO, COAr, CO.sub.2 Ar, CF.sub.3, CONH.sub.2, CHCHCO.sub.2 R, POAr.sub.2, PO-alkyl.sub.2 -(C.sub.1 -C.sub.12), 5-ring heteroaryl, 6-ring heteroaryl, Si-alkyl.sub.3 -(C.sub.1 -C.sub.12), where R=alkyl(C.sub.1 -C.sub.8), aryl(C.sub.5 -C.sub.10) and R.sup.1 and R.sup.2 independently of one another are hydrogen, C.sub.1 -C.sub.12 -alkyl, Ar as defined above, 5-ring heteroaryl, 6-ring heteroaryl, by reacting chloroaromatics of the formula II Ar--Cl (II) with ammonia or primary or secondary amines of the formula III R.sup.1 R.sup.2 NH (III) in which Ar and R.sup.1 and R.sup.2 are as defined above, which comprises reacting the starting materials in the presence of a palladium catalyst, a strong base and a halide cocatalyst in an inert solvent at temperatures of 80.degree.-200.degree. C.
本发明涉及一种制备式(I) Ar-NR.sup.1R.sup.2(I)的芳香胺的方法,在该式中Ar为##STR1##,R.sup.3至R.sup.9分别独立地为氢、C.sub.1-C.sub.8-烷基、烷氧基-(C.sub.1-C.sub.8)、酰氧基-(C.sub.1-C.sub.8)、OAr、Ar、氟、氯、溴、碘、羟基、硝基、氰基、CO.sub.2H、CHO、SO.sub.3H、SO.sub.2R、SOR、NH.sub.2、NH-烷基-(C.sub.1-C.sub.12)、N-烷基.sub.2-(C.sub.1-C.sub.12)、NHCO-烷基-(C.sub.1-C.sub.12)、CO-烷基-(C.sub.1-C.sub.12)、NHCHO、COAr、CO.sub.2Ar、CF.sub.3、CONH.sub.2、CHCHCO.sub.2R、POAr.sub.2、PO-烷基.sub.2-(C.sub.1-C.sub.12)、5-环杂环芳基、6-环杂环芳基、Si-烷基.sub.3-(C.sub.1-C.sub.12),其中R=烷基(C.sub.1-C.sub.8)、芳基(C.sub.5-C.sub.10),而R.sup.1和R.sup.2独立地为氢、C.sub.1-C.sub.12-烷基、如上定义的Ar、5-环杂环芳基、6-环杂环芳基,通过将式II Ar-Cl(II)的氯芳烃与氨或式III R.sup.1R.sup.2NH(III)的一次或二次胺反应,其中Ar和R.sup.1和R.sup.2如上定义,所述方法包括在惰性溶剂中,在80°C至200°C的温度下,在钯催化剂、强碱和卤化物协同催化剂的存在下反应起始原料。