摘要:
A composition, which is suitable for the production of stilbene compounds, can be separated from tall oil. It contains esters of pinosylvin or pinosylvin derivatives and it is concentrated in relation to these. Preferably, the composition contains esters of pinosylvin monomethyl ethers, the acid part of which is formed of an inorganic acid or an organic acid, in particular an organic acid, which is present in the crude tall oil or which is generated from this oil during the process of refining it. Typically, such acids are fatty and resin acids and lower alkane acids. With the invention, it is possible to generate, at an industrial scale, product fractions, and the pinosylvin compounds which are separated from the fractions can be used as such or they can be further modified by means of different chemical methods.
摘要:
A (+)-stereoisomer of formula (I), wherein X is H or F; or a salt thereof; which is useful: as an anesthetic; for inducing or maintaining general anesthesia; for promoting sedation; for promoting an antiemetic effect; for treatment of nausea or vomiting; or for treatment of a migraine.
摘要:
A (-)-stereoisomer of formula (I): [insert formula (I) wherein X is H or F; or a pharmaceutically acceptable salt or prodrug thereof, useful as an anesthetic.
摘要:
The present invention relates to a compound of general formula (I) below in which R1, R2 and R3 represent, independently of one another, a hydrogen atom or a C1-C6 alkyl group or a (C1-C6 alkyl)carbonyl group, R4, R5, R6 and R7 represent a hydrogen or a C1-C6 alkyl group, a C1-C6 alkoxy group or a (C1-C6 alkyl)carbonyloxy group, and n is an integer between 8 and 20, or its pharmaceutically acceptable addition salts, isomers, enantiomers and diastereoisomers, and also mixtures thereof. The invention also relates to a pharmaceutical composition comprising the compound and to the use thereof as a neurotrophic agent.
摘要:
A novel, optically active, quaternary ammonium salt with axial asymmetry which is useful as a phase-transfer catalyst with which a glycine derivative is stereoselectively alkylated to convert it into an optically active α-amino acid derivative. The quaternary ammonium salt is, for example, a compound represented by the formula (I). The quaternary ammonium salt is usable as a phase-transfer catalyst for stereoselectively alkylating a compound having a specific structure.
摘要:
The present invention is directed to partitioning agents and methods of using same to effectuate separation of a reactant, intermediate product, and/or final product from a reaction mixture while minimizing the need for traditional separation or isolation techniques.
摘要:
A process for preparing a polyhydric alcohol according to the invention comprises subjecting a polyhydric alcohol compound having protected hydroxy group(s) to microwave irradiation in the presence of basic compound(s) or acid(s) having an acid dissociation exponent (pKa) of -8 to 3 at 25°C to remove the protecting groups of the hydroxy group of the polyhydric alcohol compound. The invention can provide an industrially advantageous process for preparing polyhydric alcohols by readily removing protecting group(s) from protected hydroxy group(s) of polyhydric alcohol compounds.
摘要:
Zur Verfügung gestellt werden neue Fluor enthaltende Bisphenole der allgemeinen Formel (I) worin R und n die in der Beschreibung angegebenen Bedeutungen haben, ein Verfahren zu deren Herstellung sowie einige Vor- und Zwischenprodukte dieser Herstellung. Die Fluor enthaltenden Bisphenole sind besonders als Einsatzstoffe für die Herstellung von Flüssigkristallen, Polymeren und Flammschutzmitteln geeignet.
摘要:
In order to provide a novel optically active binaphthol derivative useful as an asymmetric catalyst or the like, with which a higher reaction yield and a higher optical yield (selectivity) may be attained in asymmetric synthesis, an asymmetric catalyst using the same and a method of asymmetric synthesis, an optically active fluorinated binaphthol derivative represented by the following formula (I) (wherein R 1 and R 2 each represent a fluorinated hydrocarbon group) was synthesized.