Boron trifluoride-diethyl ether complex (BF3⋅OEt2) was demonstrated to be an efficient catalyst for the amino-Claisen rearrangements of various aromatic N-allylamines into the corresponding o-allylamines in moderate yields.
METAL COMPLEXES OF SALAN-TYPE LIGANDS AND USES THEREOF AS CATALYSTS FOR POLYMERIZATION OF ALPHA-OLEFINS
申请人:Kol Moshe
公开号:US20130310529A1
公开(公告)日:2013-11-21
Use of homogeneous catalytic systems which include as a pre-catalyst a complex of a group 4 metal and a Salan ligand in the polymerization of alpha-olefins, is disclosed. The Salan ligand is characterized by a sequential diamino-containing skeleton unit which is non-symmetric, and the pre-catalysts can also be such that are devoid of a symmetry element. The disclosed polymerization results in alpha-olefin polymers such as polypropylene which are characterized by high levels of tacticity. Also disclosed are novel Salan ligands and novel complexes thereof with group 4 metals.
Verfahren zur Herstellung von Harnstoff- und/oder Biuretgruppen aufweisenden aromatischen Polyisocyanaten und ihre Verwendung als Isocyanatkomponente bei der Herstellung von Polyurethankunststoffen
申请人:BAYER AG
公开号:EP0062823A1
公开(公告)日:1982-10-20
Die Erfindung betrifft ein Verfahren zur Herstellung von gegebenenfalls als Homologen- und/oder Isomerengemisch vorliegenden Harnstoff- und/oder Biuretgruppen aufweisenden aromatischen Polyisocyanaten durch Umsetzung von aromatischen Diisocyanaten mit Diaminen mit primären oder sekundären Aminogruppen bei 20 bis 180°C unter Einhaltung eines Äquivalentverhältnisses zwischen Isocyanatgruppen und Aminogruppen von 5:1 bis 100:1, wobei mindestens 25 Mol-% der zum Einsatz gelangenden Diisocyanate und/oder mindestens 25 Mol-% der zum Einsatz gelangenden Diamine Alkyl-Phenylendiisocyanate bzw. Alkyl-Phenylendiamine, deren Alkylsubstituenten 6 bis 18 Kohlenstoffatome aufweisen, darstellen, sowie die Verwendung der Verfahrensprodukte, gegebenenfalls in in überschüssigem Ausgangsdiisocyanat gelöster Form als Isocyanatkomponente bei der Herstellung von Polyurethankunststoffen.
Tetraazaannulene cobalt complex compounds and method for preparation thereof
申请人:Asahi Kasei Kogyo Kabushiki Kaisha
公开号:EP0073456A1
公开(公告)日:1983-03-09
A tetraazaannulene cobalt complex compound having the general formula (I);
wherein
R1, R2 and R3 each independently is a hydrogen atom, a C1-8 alkoxy group or a C1-8 alkyl group but in case of one of R1,
R2 and R3 being a hydrogen atom the other two groups are not hydrogen atoms at the same time, and when R1 is a methyl group R2 and R3 are not hydrogen atoms at the same time.
A process for the reductive alkylation of aromatic nitro-containing compounds with ketones or aldehydes
申请人:THE GOODYEAR TIRE & RUBBER COMPANY
公开号:EP0138732A2
公开(公告)日:1985-04-24
There is disclosed a process for the reductive alkylation of aromatic nitro-containing compounds with ketones or aldehydes wherein the improvement is characterized in that a specific polymer bound co-catalyst system is utilized. More specifically, a polymer bound anthranilic acid palladium complex is used in conjunction with a bound sulfonic acid resin as a catalyst system in a reaction to produce compounds such as N-phenyl-N'-alkyl-p-phenylenediamine.