摘要:
Disclosed is a method for highly efficiently obtaining an optically active alcohol from a carbonyl compound highly enantioselectively. Also disclosed is a ligand used in such a method. Specifically, an optically active alcohol is obtained by reacting a carbonyl compound and an organozinc compound by using a ligand (L) shown below.
摘要:
Both low-molecular and high-molecular aromatic or heteroaromatic compounds, which are substituted with olefins, play an important role in industry, for example as auxiliary agents or additives in cosmetic preparations such as sunscreen agents, in diverse fine chemicals and chemicals for the electronics industry and in intermediate products for the pharmaceutical and agrochemical industries. Such compounds are of outstanding importance particularly in the rapid-growth field of organic semiconductors, (e.g. for use in organic or polymer LEDs, organic solar cells and organic integrated circuits). The invention relates to a method for producing olefin-substituted aromatic or heteroaromatic compounds of this type, by reacting a functional aryl or heteroaryl compound with an olefin derivative, which has at least one H-atom on its double bond, in the presence of a simple palladium compound, optionally in the presence of an additive containing nitrogen and of a base in a solvent, to form a C-C-linkage and a formal splitting-off of the aryl, or heteroaryl derivative functional group and of one H-atom of the olefin compound. The invention is characterised by the presence of at least one additive containing metal, which is different from palladium.
摘要:
Both low-molecular and high-molecular aromatic or heteroaromatic compounds, which are substituted with olefins, play an important role in industry, for example as auxiliary agents or additives in cosmetic preparations such as sunscreen agents, in diverse fine chemicals and chemicals for the electronics industry and in intermediate products for the pharmaceutical and agrochemical industries. Such compounds are of outstanding importance particularly in the rapid-growth field of organic semiconductors, (e.g. for use in organic or polymer LEDs, organic solar cells and organic integrated circuits). The invention relates to a method for producing olefin-substituted aromatic or heteroaromatic compounds of this type, by reacting a functional aryl or heteroaryl compound with an olefin derivative, which has at least one H-atom on its double bond, in the presence of a simple palladium compound, optionally in the presence of an additive containing nitrogen and of a base in a solvent, to form a C-C-linkage and a formal splitting-off of the aryl, or heteroaryl derivative functional group and of one H-atom of the olefin compound. The invention is characterised by the presence of at least one additive containing metal, which is different from palladium.
摘要:
Ein Verfahren zur Herstellung mehrkerniger aromatischer Verbindungen durch Kreuzkupplung von terminalen Alkinen mit aromatischen Halogenverbindungen oder - Perfluoralkylsulfonaten unter Palladiumkatalyse in Gegenwart mindestens eines wasserlöslichen Komplexliganden, dadurch gekennzeichnet, daß das Reaktionsmedium eine wäßrige und eine organische Phase bildet und das Palladium in Form einer in der organischen Phase löslichen Palladiumverbindung oder in fester Form als Palladiummetall, insbesondere auf einem Träger aufgebracht, zugesetzt wird. Die erfindungsgemäße Reaktion verläuft chemoselektiv, so daß selbst elektrophile Gruppen, wie Ester oder Nitrile, den Verlauf der Reaktion nicht beeinträchtigen. Durch das erfindungsgemäße Verfahren lassen sich organische Verbindungen ökonomisch in sehr guten Ausbeuten und gleichzeitig sehr hoher Reinheit, insbesondere ohne Verunreinigung durch die Komplexliganden, herstellen.
摘要:
A compound with a 12-lipoxygenase inhibitor activity, represented by general formula (I), a precursor therefor, and a medicine containing the same, wherein R1 represents hydrogen or hydroxy; one of R?2 and R3¿ represents hydrogen, while the other cyano; and Ar represents (a), (b) or (c), wherein R4 represents hydrogen, lower alkyl, lower alkoxy, halogen, trifluoromethyl or cyano.