Abstract:
A method for producing an ester compound includes reacting a compound having at least one cyclic structure of a norbornene ring and a norbornadiene ring with an alcohol and carbon monoxide by using a palladium catalyst and an oxidizing agent, to thereby introduce ester groups to carbon atoms forming a double bond in the cyclic structure and obtaining the ester compound, wherein the palladium catalyst includes a palladium acetate having a nitrite ligand in an amount of 10% by mole or more in terms of metal, and the palladium acetate having a nitrite ligand is represented by the general formula (1): Pd3(CH3COO)5(NO2).
Abstract:
Disclosed is a novel zinc cluster compound represented by general formula (1): Zn4O (OCOR)6 (RCOOH)n, wherein R represents an alkyl group which has 1 to 4 carbon atoms and may be substituted with a halogen atom, and n represents 0.1 to 1, and also disclosed are a method for producing the compound and a reaction using the compound.
Abstract:
Lactones are prepared by the catalytic carbonylation of oxiranes using a catalyst system comprising a) at least one carbonylation catalyst A comprising uncharged or anionic transition metal complexes of metals of groups 5 to 11 of the Periodic Table, b) at least one metal compound B of the formula (I) MXxRn-x (I) where M is an element of group 2, 3, 4, 12, 13, R is hydrogen or a hydrocarbon radical which may be substituted on the carbon atoms other than on the carbon atom bound to M, X is an anion, n is a number corresponding to the valence of M, x is in the range from 0 to n, and c) at least one organic, chiral compound C which has fewer than four coordination sites.
Abstract:
This invention relates to a catalyst system for the hydroformylation of propene consisting essentially of a catalytic complex of rhodium, carbon monoxide, and a triarylphosphine, and a cobalt compound; to the process for stabilizing and/or regenerating a catalyst complex combination of rhodium, carbon monoxide, and a triarylphosphine comprising adding a cobalt compound to said catalyst complex; and to the process of hydroformylating propene with said catalyst system.
Abstract:
This invention concerns a process for preparing the acid halides of carboxylic acids (alternatively referred to as alkanoyl halides or acyl halides) by the addition of carbon monoxide and hydrogen halides to alkenes catalyzed by homogeneous noble metal halides in combination with Group IVB halide co-catalysts.
Abstract:
THERE ARE PROVIDED NOVEL COMPLEX COMPOUNDS OF THE GENERAL FORMULA
(L)N-ME-ME-(L)N
WHEREIN ME IS IR, AND L IS A COMPLEXING COMPOUND SELECTED FROM PHOSPHINES. THE NEW COMPLEXES ARE PREPARED BY TRANSFORMING A COMPOUND OF IRIDIUM INTO AT LEAST A PARTIAL HYDRIDE, THEN DEHYDROGENATING THIS IN THE PRESENCE OF A HYDROGEN ACCEPTOR AND OF A COMPLEXING AGENT. THE NEW COMPLEX COMPOUNDS HAVE CATALYTIC ACTIVITY, E.G., IN THE TRANSFER OF HYDROGEN IN UNSATURATED COMPOUNDS.
Abstract:
The use of certain complexes of cobalt and rhodium containing phosphine either either unsupported or supported, as catalysts for the cyclo-carbonylation reaction.
Abstract:
THE PROCESS FOR PREPARING AN ORGANIC ISOCYANATE BY REACTING AN ORGANIC NITRO COMPOUND WITH CARBON MONOXIDE IN THE PRESENCE OF A CATALYST SYSTEM COMPRISED OF (1) A NITROGEN-CONTAINING HETEROAROMATIC COMPOUND AND (2) A HALIDE OF A NOBLE METAL, AND (3) A HALIDE OF A NON-NOBLE METAL SELECTED FROM THE GROUP CONSISTING OF IRON AND THE METALS OF GROUPS IVA, VA, VIA, VIIA, IIB, IVB, AND VB OF THE PERIODIC TABLE. THE HETEROAROMATIC NITROGEN-CONTAINING COMPOUND IS ONE CONTAINING BETWEEN FIVE AND SIX MEMBERS IN THE RING, CONTAINING NO ELEMENT OTHER THAN NITROGEN AND CARBON IN THE RING, AND HAVING AT LEAST TWO DOUBLE BONDS IN THE RING. PYRIDINE AND ISOQUINOLINE ARE THE PREFERRED HETEROAROMATIC COMPOUNDS. THE NOBLE METAL HALIDE IS PREFERABLY A HALIDE OF PALLADIUM, RHODIUM, IRIDIUM, RHENIUM, PLATINUM OR MIXTURES THEREOF. THE PREFERRED NON-NOBLE METAL HALIDES ARE HALIDES OF TITANIUM, ZIRCONIUM, VANADIUM, TANTALUM, CHROMIUM, MANGANESE, IRON, ZINC, MERCURY, GERMANIUM, TIN, LEAD, ARSENIC, ANTIMONY AND BISMUTH. A FOURTH COMPONENT, SUCH AS MOLYBDENUM TRIOXIDE OR ANOTHER METAL OXIDE, MAY ALSO BE INCLUDED IN THE CATALYST SYSTEM.
Abstract:
This disclosure relates to compositions comprising diruthenium catalysts and uses related thereto. In certain embodiments, the diruthenium catalyst comprises a cyclopropyl ring substituted with a carboxylic acid ligand. In certain embodiments, the diruthenium catalyst comprises an N-(sulfonyl)pyrrolidine ring substituted with a carboxylic acid ligand. In certain embodiments, the diruthenium catalyst comprises a 2-(1,3-dioxoisoindolin-2-yl)acetic acid ligand. In certain embodiments, this disclosure relates to methods of using catalysts in chemical transformations disclosed herein.
Abstract:
The present invention is directed to an organometallic complex and a catalyst composition capable of producing polylactide resins with improved properties at a higher conversion rate, a method of producing the organometallic complex, polylactide resins having enhanced hydrolysis resistance and heat resistance together with superior mechanical properties, a preparation process therefor, and polylactide resin compositions including the same.