Abstract:
The present invention relates to a process for preparing aromatic acyl derivatives of formula (I) using methanesulfonic acid. The invention further relates to methods for preparing biological active ingredients, such as paracetamol.
Abstract:
Method for the preparation of two amides from one amidine in a one-pot conversion, where amides of formula (I) or formula (II) are formed. Formula (Ia) and Formula (Ib) Fornula (IIa) and Formula (IIb).Obtained amides and their useful applications are contemplated.
Abstract:
The present invention provides a method for preparing a benzamide compound, and belongs to the technical field of organic synthesis. The method for preparing a benzamide compound provided by the present invention comprises the following steps: mixing aryl-substituted dihydrooxazole, an acidic catalyst, water and a reaction solvent, and subjecting same to a hydrolysis ring-opening reaction to obtain the benzamide compound, wherein the acidic catalyst is a p-toluenesulphonic acid or sulphonic acid ion exchange resin. According to the present invention, a p- toluenesulphonic acid or sulphonic acid ion exchange resin is used as an acidic catalyst, under the catalytic action of the p-toluenesulphonic acid or sulphonic acid ion exchange resin, aryl-substituted dihydrooxazole is subjected to a hydrolysis ring-opening reaction to obtain the benzamide compound, only catalytically metered toluenesulphonic acid or sulphonic acid ion exchange resin is needed, the toluenesulphonic acid or sulphonic acid ion exchange resin is convenient to remove after the completion of the reaction, with very little waste, and industrial production is convenient to achieve.
Abstract:
The invention relates to a process for preparing at least one di- or polyformamide comprising at least two -NHCHO groups by reacting at least one primary di- or polyamine with carbon dioxide in the presence of hydrogen and at least one catalyst selected from the group consisting of heterogeneous and homogeneous catalysts or mixtures thereof. The invention further relates to a di- or polyformamide and their use for different purposes as well as a two-component-system comprising the di- or polyformamide.
Abstract:
The present invention relates to novel Ruthenium complexes of formulae A1-A4 and their use, inter alia, for (1) dehydrogenative coupling of alcohols to esters; (2) hydrogenation of esters to alcohols (including hydrogenation of cyclic esters (lactones) or cyclic di-esters (di-lactones), or polyesters); (3) preparing amides from alcohols and amines -(including the preparation of polyamides (e.g., polypeptides) by reacting dialcohols and diamines and/or polymerization of amino alcohols and/or forming cyclic dipeptides from p-aminoalcohols; (4) hydrogenation of amides (including cyclic dipeptides, polypeptides and polyamides) to alcohols andamines; (5) hydrogenation of organic carbonates (including polycarbonates) to alcohols or hydrogenation of carbamates (including polycarbamates) or urea derivatives to alcohols and amines; (6) dehydrogenation of secondary alcohols to ketones; (7) amidation of esters (i.e., synthesis of amides from esters and amines); (8) acylation of alcohols using esters; (9) coupling of alcohols with water and a base to form carboxylic acids; and (10) preparation of amino acids or their salts by coupling of amino alcohols with water and a base. The present, invention further relates to the use of certain known Ruthenium complexes for the preparation of amino acids or their salts from amino alcohols.
Abstract:
Verfahren zur Hydrierung von Kohlenstoffdioxid zu einem Formamid umfassend folgende Schritte: Bereitstellung einer organischen Phase, umfassend ein organisches Lösungsmittel und einen in dem organischen Lösungsmittel gelösten oder suspendierten Katalysator, wobei der Katalysator eine Verbindung eines Metalls der Gruppen 8, 9 oder 10 des Periodensystems der Elemente ist, die mit Wasser einen Verteilungskoeffizienten log( P ) ≥1,5 bei Standardbedingungen aufweist, und einer wässrigen Phase in einem Reaktor, wobei die organische Phase und die wässrige Phase zwei nicht miteinander mischbare Phasen ausbilden und, Hinzufügen mindestens eines primären oder sekundären Amins, Kohlenstoffdioxid und Wasserstoff in diesen Reaktor, Hydrierung des Kohlenstoffdioxids mit dem Wasserstoff zum Formamid, wobei die Reaktionstemperatur von 80°C bis 200°C beträgt und das gebildete Formamid in die wässrige Phase übergeht, Abtrennung der wässrigen Phase von der organischen Phase.
Abstract:
There is provided a process for the preparation of Lacosamide in a particular polymorphic form, which process involves the isolation of a salt of formula I : according to the methods defined in the application.