Patent classifications
C07C13/20
CHROMIUM-CATALYZED PRODUCTION OF ALCOHOLS FROM HYDROCARBONS IN THE PRESENCE OF OXYGEN
Processes for converting a hydrocarbon reactant into an alcohol compound and/or a carbonyl compound are disclosed in which the hydrocarbon reactant and either a supported chromium (VI) catalyst or a supported chromium (II) catalyst are contacted, optionally with UV-visible light irradiation, followed by exposure to an oxidizing atmosphere and then hydrolysis to form a reaction product containing the alcohol compound and/or the carbonyl compound. The presence of oxygen significant increases the amount of alcohol/carbonyl product formed, as well as the formation of oxygenated dimers and trimers of certain hydrocarbon reactants.
Asymmetric addition reactions
Processes of forming C.sub.sp2C.sub.sp3 bonds at the allylic carbon of a cyclic allylic compound starting material are disclosed, in which a racemic mixture of a cyclic allylic compound having a leaving group attached to the allylic carbon is reacted with a compound having a nucleophilic carbon atom in the presence of a Rh(I), Pd(II) or Cu(I) pre-catalyst and a chiral ligand. The reaction products containing the newly-formed C.sub.sp2C.sub.sp3 bond are generated in high stereoisomeric excess, and may therefore serve as important organic building blocks in the preparation of new agrochemicals and pharmaceuticals.
Asymmetric addition reactions
Processes of forming C.sub.sp2C.sub.sp3 bonds at the allylic carbon of a cyclic allylic compound starting material are disclosed, in which a racemic mixture of a cyclic allylic compound having a leaving group attached to the allylic carbon is reacted with a compound having a nucleophilic carbon atom in the presence of a Rh(I), Pd(II) or Cu(I) pre-catalyst and a chiral ligand. The reaction products containing the newly-formed C.sub.sp2C.sub.sp3 bond are generated in high stereoisomeric excess, and may therefore serve as important organic building blocks in the preparation of new agrochemicals and pharmaceuticals.
METHOD FOR PREPARING 2-(CYCLOHEXENYLIDENE) MALONIC ACID DERIVATIVES AND USES THEREOF
Disclosed are a method for preparing 2-(cyclohexenylidene) malonic acid derivatives and uses thereof. In this method, an olefin and a 2-substituted malonic acid derivative are used as starting materials to prepare the 2-(cyclohexenylidene) malonic acid derivative in the presence of a catalyst through cyclization reaction. This method has the following advantages: (1) the method can be very efficiently used for the synthesis of highly sterically-hindered 2-(2,6-disubstituted cyclohexenylidene) malonic acid derivatives; (2) the reaction yield is high, the reaction conditions are mild, and the wastes are less, favorable for industrial production. More importantly, the present invention extends the further use of 2-(cyclohexenylidene)malonic acid derivatives in organic synthesis, especially in the synthesis of 2-aryl malonic acid derivatives and their corresponding drugs such as Pinoxaden.
Chromium-catalyzed production of alcohols from hydrocarbons in the presence of oxygen
Processes for converting a hydrocarbon reactant into an alcohol compound and/or a carbonyl compound are disclosed in which the hydrocarbon reactant and either a supported chromium (VI) catalyst or a supported chromium (II) catalyst are contacted, optionally with UV-visible light irradiation, followed by exposure to an oxidizing atmosphere and then hydrolysis to form a reaction product containing the alcohol compound and/or the carbonyl compound. The presence of oxygen significant increases the amount of alcohol/carbonyl product formed, as well as the formation of oxygenated dimers and trimers of certain hydrocarbon reactants.
Chromium-catalyzed production of alcohols from hydrocarbons in the presence of oxygen
Processes for converting a hydrocarbon reactant into an alcohol compound and/or a carbonyl compound are disclosed in which the hydrocarbon reactant and either a supported chromium (VI) catalyst or a supported chromium (II) catalyst are contacted, optionally with UV-visible light irradiation, followed by exposure to an oxidizing atmosphere and then hydrolysis to form a reaction product containing the alcohol compound and/or the carbonyl compound. The presence of oxygen significant increases the amount of alcohol/carbonyl product formed, as well as the formation of oxygenated dimers and trimers of certain hydrocarbon reactants.
MIXED METAL IRON OXIDES AND USES THEREOF
This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO.sub.2 and the selective reaction with organic compounds.
MIXED METAL IRON OXIDES AND USES THEREOF
This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO.sub.2 and the selective reaction with organic compounds.
MIXED METAL IRON OXIDES AND USES THEREOF
This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO.sub.2 and the selective reaction with organic compounds.
PRODUCTION OF MONOTERPENE BLENDS BY UNICELLULAR PHOTOSYNTHETIC MICROORGANISMS
This invention provides compositions and methods for providing high product yield of transgenes expressed in cyanobacteria and microalgae.