摘要:
A convenient process for producing a compound represented by general formula (2) by the catalytic hydrogenolysis of a compound represented by general formula (1) or (3) in the presence of a base, wherein R represents hydrogen or C1-C4 alkyl; and X represents chlorine or bromine. The obtained compound can be used as an intermediate for producing medicines.
摘要:
A novel (1R, 2S)-1-acyl-2-carboxycyclohex-4-ene derivative represented by general formula (I), and a process for producing the same. In the said formula, R1 represents hydrogen, lower alkyl or (un)substituted aryl; and R2 represents hydrogen or lower alkyl. A process for producing a (3S, 4R)-4-substituted-3-carboxycyclopentanone derivative represented by general formula (A), wherein R?1 and R2¿ are each as defined above.
摘要:
The invention relates to a novel process, novel process steps and novel intermediates useful in the synthesis of pharmaceutically active compounds, in particular neutral endopeptidase (NEP) inhibitors such as sacubitril, and prodrugs thereof.
摘要:
The invention relates to highly enantioselective processes for the synthesis of chiral 1-alkanols via Zr-catalyzed asymmetric carboalumination of alkenes.
摘要:
A method for producing α-, β-unsaturated carboxylic acid esters in high yield from acetone cyanohydrin and sulfuric acid through the separation and concurrent catalytic conversion of reaction side products to additional α-, β- unsaturated carboxylic acid ester product. The catalyst comprises at least one Group IA element, and boron as a promoter, on a porous support.
摘要:
A transesterification process produces a (meth)acrylate ester product from a mixture comprising an alkyl(meth)acrylate reactant, an alcohol reactant, a catalyst, and a polymerization inhibitor. The mixture is subjected to reaction conditions sufficient to produce a product (meth)acrylate and a product alcohol, which are different than the reactants.
摘要:
Cis and trans ruthenium complexes that can be used as catalysts for ring opening metathesis polymerisation (ROMP) are described. The complexes are generally square pyramidal in nature, having two anionic ligands X. Corresponding cationic complexes where one or both of the anionic ligands X are replaced by a non-co-ordinating anionic ligand are also described. Polymers such as polydicyclopentadiene (PDCPD) can be prepared using the catalysts.
摘要:
The present invention relates to novel substituted and unsubstituted terephthalic acid and carboxylate derivatives and products prepared therefrom having a significant renewable content. The invention also relates to processes for preparing substituted and unsubstituted terephthalic and carboxylate derivatives thereof wherein a portion of the starting materials utilized is derived from renewable resources. The invention also relates to novel cyclohexene based intermediates prepared in these processes and to conversion of these intermediates to substituted and unsubstituted cyclohexane-1,4-dicarboxylates and carboxylate derivatives thereof and novel forms of the resulting products having renewable content.
摘要:
Procédé de préparation des composés de formule (IV) dans laquelle R 1 , R 2 , R 3 et R 4 , identiques ou différents, représentent chacun un atome d'hydrogène, un groupement alkyle (C 1 -C 6 ) linéaire ou ramifié, un groupement alkoxy (C 1 -C 6 ) linéaire ou ramifié, un atome de fluor, de chlore, un groupement aminé protégé, un groupement hydroxyle protégé, un groupement alkoxycarbonyle dans lequel le groupement alkoxy est (C 1 -C 6 ) linéaire ou ramifié, un groupement CF 3 , ou R 1 =R 4 =H et R 2 et R 3 forment ensemble avec les atomes de carbone qui les portent un groupement 1,3-dioxolane, R 5 représente un groupement alkyle (C 1 -C 6 ) linéaire ou ramifié, saturé ou insaturé, un groupement hydroxyalkyle (C 1 -C 6 ) linéaire ou ramifié dont la fonction hydroxyle est protégée, ou un groupement CO 2 R 7 dans lequel R 7 est un groupement alkyle (C 1 -C 6 ) linéaire ou ramifié, R 6 représente un groupement cyano ou un groupement CO 2 R 8 dans lequel R 8 est un groupement alkyle (C 1 -C 6 ) linéaire ou ramifié. Application à la synthèse de l'ivabradine, de ses sels d'addition à un acide pharmaceutiquement acceptable et de leurs hydrates.