摘要:
Verfahren zur Herstellung eines oder mehrerer Komplexbildner, ausgewählt aus Methylglycindiessigsäure, Glutaminsäurediessigsäure und deren Salzen, durch katalytische Dehydrierung von N,N-Bis-(2-hydroxyethyl)-alanin und/oder N,N-Bis-(2-hydroxyethyl)-glutaminsäure bzw. deren Salzen in Gegenwart von Alkalihydroxid, wobei ein Katalysator enthaltend Kupfer und Zirkoniumdioxid eingesetzt wird, dessen Aktivierung eine Reduktion ist, dadurch gekennzeichnet, dass die Vorstufe des betreffenden Katalysators einen Kristallisationsgrad K, definiert als (I) im Bereich von 0 bis 50 % aufweist.
摘要:
The present invention relates to γ,δ-unsaturated a-amino acids of general formula (I). The present invention also provides a versatile process for the stereospecific synthesis of said compounds of formula (I), involving a Wittig reaction. The present invention also relates to intermediate products of general formulae (II) and (III), as shown below, which are involved in the synthesis of compounds (I).
摘要:
The present invention relates to an improved method for preparing dipeptidyl peptidase-IV inhibitor and intermediate. The present invention is able to reduce preparation costs by using low cost reagents on reaction and is able to be used in mass production by improving yield.
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung von 8-Aryl-Octanoylderivaten, insbesondere chiralen 8-Hydrazino-8-Aryl-Octanoylamiden, sowie neue Zwischenprodukte, die in dem Verfahren zur Herstellung der genannten Octanoylderivate eingesetzt werden und deren Verwendung.
摘要:
Katalizatoren zur Herstellung von Carbonsäuresalzen aus Alkoholen, die a) aus Kupfer bestehen oder b) 99,9 bis 10 Gew.-% Kupfer und 0,01 bis 90 Gew.-% Eisen und 0 bis 50 Gew.-% eines oder mehrerer anderer Metalle enthalten, die gegebenenfalls dotiert sind, indem man die Hydroxide durch Prezipitation von Kupfersalzlösungen bzw. von Kupfer- und Eisensalzlösungen ggf. mit Salzen anderer Metalle durch Coprezipitation mit einer Base erhält, und mit Wasserstoff reduziert.
摘要:
This invention is directed to a process for making a salt of a carboxylic acid. The process comprises contacting a catalyst with an alkaline mixture comprising a primary alcohol. In one embodiment, the catalyst comprises a metal supporting structure (preferably a metal sponge supporting structure comprising at least about 10% by weight nickel) having a copper-containing active phase at the surface thereof and iron as a catalyst modifier. The supporting structure is resistant to deformation under the conditions of the dehydrogenation reaction. This invention is also directed to novel nickel-containing catalysts having a copper-containing active phase and iron as a catalyst modifier which may, for example, be used in the above process. This invention is further directed to processes for making such catalysts.
摘要:
The invention relates to a method for oxidising primary amino alcohols, primary or secondary alkenols or alkinols into the corresponding acids or ketones. According to said method, a primary amino alcohol or a primary or secondary alkenol or alkinol is oxidised in the form of a substrate, in the presence of an equimolar quantity of periodate or a molar excess thereof in relation to the alcoholic hydroxy groups and catalytic quantities of dichromate or CrO3 and in the presence of an acid in water, a water/solvent mixture or a solvent at a temperature of -20 DEG C to +50 DEG C, to produce the corresponding acid or the corresponding ketone.
摘要:
The use of a mono-cationic salt of N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED) in iron chelating therapy is disclosed. In particular, the invention relates to the intravenous use of a mono-cationic salt of HBED for treating a primate with a condition treatable by an iron chelator such as iron overload, especially transfusional iron overload.
摘要:
Raney copper, which is doped (promoted) with an effective quantity of a doping (promoting) agent selected from the group boric acid, onium fluorides, salts of fluorine complex anions, and heteropoly acids, represents an outstanding oxidation catalyst for amine-group-containing primary amines to carboxylic acids.