Patent number: 5831128
Abstract: 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.
Type:
Grant
Filed:
December 3, 1997
Date of Patent:
November 3, 1998
Assignee:
Hoechst Aktiengesellschaft
Inventors:
Matthias Beller, Thomas Riermeier, Claus Peter Reisinger, Wolfgang Anton Herrmann, Holger Geissler
Patent number: 5559277
Abstract: The invention relates to a process for preparing biphenyls of the formula (I) ##STR1## where R.sup.1a to R.sup.10a are, independently of one another, hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkenyl, C.sub.1 -C.sub.12 -alkynyl, alkoxy-(C.sub.1 -C.sub.12), acyloxy-(C.sub.1 -C.sub.12), O-phenyl, aryl, heteroaryl, fluorine, chlorine, OH, NO.sub.2, CN, COOH, 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), C-Hal.sub.3, NHCO-alkyl-(C.sub.1 -C.sub.8), CONH-alkyl-(C.sub.1 -C.sub.4), CON-(alkyl).sub.2 -(C.sub.1 -C.sub.4), COO-alkyl-(C.sub.1 -C.sub.12), CONH.sub.2, CO-alkyl-(C.sub.1 -C.sub.12), NHCOH, NHCOO-alkyl-(C.sub.1 -C.sub.8), CO-phenyl, COO-phenyl, CHCHCO.sub.2 -alkyl-(C.sub.1 -C.sub.12), CHCHCO.sub.2 H, PO-phenyl.sub.2, PO-alkyl.sub.2 -(C.sub.1 -C.sub.8), by reaction of haloaromatics or aryl sulfonates of the formula (II) ##STR2## with arylboron derivatives of the formula III ##STR3## where R.sup.1a to R.sup.
Type:
Grant
Filed:
June 29, 1995
Date of Patent:
September 24, 1996
Assignee:
Hoechst AG
Inventors:
Matthias Beller, Wolfgang A. Herrmann, Christoph Brossmer
Patent number: 5516929
Abstract: Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, water, an oxidant and an osmium-containing compound are combined. In the method of asymmetric oxyamination of the present invention, an olefin, a chiral ligand, an organic solvent, water, a metallochloramine derivative, an osmium-containing compound and, optionally, a tetraalkyl ammonium compound are combined. In the method of asymmetric diamination of the present invention, an olefin, a chiral ligand, an organic solvent, a metallo-chloramine derivative, an amine and an osmium-containing compound are combined. In one embodiment, an olefin, a chiral ligand which is a polymeric dihydroquinidine derivative or a dihydroquinine derivative, acetone, water, a base, an oxidant and osmium tetroxide are combined to effect asymmetric dihydroxylation of the olefin.
Type:
Grant
Filed:
February 12, 1993
Date of Patent:
May 14, 1996
Assignee:
Massachusetts Institute of Technology
Inventors:
K. Barry Sharpless, Matthias Beller, Brent Blackburn, Yasuhiro Kawanami, Hoi-Lun Kwong, Yasukazu Ogino, Tomoyuki Shibata, Tatsuzo Ukita, Lisa Wang