摘要:
The invention concerns a method for the selective extraction of a reaction product, originating from an oxidative cleavage of an unsaturated fatty acid or of an ester derivative or of an unsaturated nitrile derivative, said reaction product being a co-functionalised acid chosen from the C 6 to C15 diacids, ester-acids and nitrile-acids, using, as the selective extraction solvent, a composition comprising a mixture of water and C1-C4 carboxylic acid. The invention also concerns the use of said method and the extraction solvent composition for the preparation of C6 to C15 amino acid, diacid or ester-acid monomers for the production of polycondensation polymers, in particular polyamides.
摘要:
An object of the present invention is to provide an optically active bicyclic γ-amino acid derivative in a high purity. The object can be attained by a mixture of compounds represented by the general formulas (I) and (I'), or a method for producing a compound represented by the general formula (VII) or a salt thereof via the compound (I):
wherein R 1 and R 2 each represent a C1-6 alkyl group or the like; and R 3 represents a cyano group or the like,
摘要翻译:本发明的目的是提供高纯度的光学活性双环-3-氨基酸衍生物。 该目的可以通过由通式(I)和(I')表示的化合物的混合物,或通过化合物(I)制备由通式(VII)表示的化合物或其盐的方法: 其中R 1和R 2各自表示C 1-6烷基等; R 3表示氰基等,
摘要:
A method for producing a salt of an amine with a cyanoalkenylcyclopropanecarboxylic acid, the method comprising a first step of mixing a carboxylic acid compound represented by formula (2C) and at least one amine selected from the group consisting of primary amines and secondary amines in an organic solvent; a second step of depositing a salt of the amine with a cyanoalkenylcyclopropanecarboxylic acid represented by formula (2) from the mixture obtained in the first step; and a third step of recovering the salt deposited in the second step;
wherein, R represents an alkyl group optionally having a substituent or a halogen atom.
摘要:
This patent discloses a method for resolution of 4-[4-(dimethylamino)-1-(4'-fluorophenyl)-1-hydroxybutyl]-3-(hydroxymethyl)-benzonitrile as a racemic or non-racemic enantiomer mixture into its isolated enantiomers, said method comprising the step of fractionally crystallising 4-[4-(dimethylamino)-1-(4'-fluorophenyl)-1-hydroxybutyl]-3-(hydroxymethyl)-benzonitrile as a salt with the (+)-(S,S)-or (-)-(R,R)-enantiomer of O , O' -di- p -toluoyl-tartaric acid in a solvent system comprising 1-propanol, ethanol or acetonitrile.