Patent classifications
B01J31/2243
Method of synthesizing (1R,2R)-nitroalcohol compound
Disclosed is a method of synthesizing a (1R,2R)-nitroalcohol compound of formula (I), as shown in the following reaction scheme, including: subjecting a compound of formula (II) and a compound of formula (III) to a condensation reaction in an organic solvent in the presence of a copper complex generated in situ from a chiral (1S,2R)-amino alcohol ligand and a cupric salt to produce the (1R,2R)-nitroalcohol compound of formula (I), where R.sup.1 and R.sup.2 are defined in the same manner as that in the specification. The method involves mild reaction conditions, excellent diastereoselectivity and high chemical yield, and thus it is suitable for industrial applications. ##STR00001##
Metal-metal bonded ammonia oxidation catalysts
Methods and catalysts for oxidizing ammonia to nitrogen are described. Specifically, diruthenium complexes that spontaneously catalyze this reaction are disclosed. Accordingly, the disclosed methods and catalysts can be used in various electrochemical cell-based energy storage and energy production applications that could form the basis for a potential nitrogen economy.
Transition metal-based heterogeneous carbonylation reaction catalyst and method for preparing lactone or succinic anhydride using catalyst
A transition metal-based heterogeneous carbonylation reaction catalyst has an excellent catalytic activity and selectivity in the carbonylation reaction and is easily separated from a product, by crosslinking polymerizing a transition metal-based homogeneous catalyst unit through a Friedel-Craft reaction. The catalyst may be used in a method for preparing lactone. The transition metal-based heterogeneous carbonylation reaction catalyst allows to produce lactone or succinic anhydride with an epoxide compound while showing a high selectivity, and can be applied in industrial very usefully due to easy separation from the product and thus reusing thereof.
Targeted near-infrared imaging by metal-organic frameworks
Metal-organic frameworks (MOFs) comprising amines on the organic linker can be used for cell targeting. In particular, primary amine groups represent one of the most versatile chemical moieties for conjugation to biologically relevant molecules, including antibodies and enzymes. Different chemical conjugation schemes can be used to conjugate biological molecules to the amino functionality on the organic linker. For example, carbodiimide chemistry can be used to link a primary amine to available carboxyl groups on the protein. For example, sulfhydryl crosslinking chemistry can be used via Traut's reagent scheme. As a demonstration of the invention, the ability of EpCAM antibody-targeted MOFs to bind to a human epithelial cell line (A549), a common target for imaging studies, was confirmed with confocal microscopy.
Preparation method for S-indoxacarb
A catalyst and a method for preparing S-indoxacarb using the catalyst. The catalyst is prepared using 3-tert-butyl-5-(chloromethyl)salicylaldehyde and cyclohexanediamine as raw materials, where an original quinine catalyst such as cinchonine is replaced with the catalyst for application in the asymmetric synthesis of tert-butyl hydroperoxide and 5-chloro-2-methoxycarbonyl-1-indanone ester, greatly improving selection in the asymmetric synthesis process, with the S-enantiomer content increasing from 75% to over 98%, achieving the recycling of a high-efficiency chiral catalyst, and greatly reducing production costs. The synthesis process of the catalyst is simple and is favorable for industrialization, and lays good foundations for the production of high-quality indoxacarb.
Water stable copper paddlewheel metal organic framework (MOF) compositions and processes using the MOFs
This invention relates to a Cu-BTC MOF which is water stable. The Cu-BTC MOF has been modified by substituting some of the BTC ligand (1,3,5, benzene tricarboxylic acid) with 5-aminoisophthalic acid (AIA). The resultant MOF retains at least 40% of its as synthesized surface area after exposure to liquid water at 60° C. for 6 hours. This is an unexpected result versus the MOF containing only the BTC ligand. This MOF can be used to abate contaminants such as ammonia in gas streams and especially air streams.
Catalysts and methods for epoxide-based polymerizations
Provided are catalysts, methods of making catalysts, methods of using catalysts, and copolymers made utilizing the catalysts. The catalyst has a metal salen complex group, a bridging group, and one or more co-catalyst groups. The metal salen complex group is attached to the bridging group and the bridging group is attached to the co-catalyst group. The copolymers made utilizing the catalysts are polyesters or polycarbonates.
Ruthenium- or osmium-based complex catalysts
The present invention provides novel ruthenium or osmium based complex structures with a unique combination of ligands comprising a Schiff-base type ligand, a N-heterocyclic carbene ligand and a CO ligand which can be prepared according to two different routes involving easily accessible starting materials and which represent excellent catalysts for hydrogenating unsaturated compounds, oligomers and polymers, in particular at unforeseeably low temperatures. ##STR00001##
Transition metal bis(phenolate) complexes and their use as catalysts for olefin polymerization
This invention relates to transition metal complexes of a dianionic, tridentate ligand that features a central neutral heterocyclic Lewis base and two phenolate donors, where the tridentate ligand coordinates to the metal center to form two eight-membered rings. Preferably the bis(phenolate) complexes are represented by Formula (I): ##STR00001##
where M, L, X, m, n, E, E′, Q, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.1′, R.sup.2′, R.sup.3′, R.sup.4′, A.sup.1, A.sup.1′, ##STR00002##
are as defined herein, where A.sup.1QA.sup.1′ are part of a heterocyclic Lewis base containing 4 to 40 non-hydrogen atoms that links A.sup.2 to A.sup.2′ via a 3-atom bridge with Q being the central atom of the 3-atom bridge.
Water stable copper paddlewheel metal organic framework (MOF) compositions and processes using the MOFs
This invention relates to a Cu-BTC MOF which is water stable. The Cu-BTC MOF has been modified by substituting some of the BTC ligand (1,3,5, benzene tricarboxylic acid) with 5-aminoisophthalic acid (AIA). The resultant MOF retains at least 40% of its as synthesized surface area after exposure to liquid water at 60° C. for 6 hours. This is an unexpected result versus the MOF containing only the BTC ligand. This MOF can be used to abate contaminants such as ammonia in gas streams and especially air streams.