摘要:
The invention relates to a process for the preparation of compounds of general formula (III), wherein R represents fluorine or chlorine atom and X represents chlorine or bromine atom, by halogenation of cyclopropyl benzyl ketone of general formula (II), wherein R represents fluorine or chlorine atom and the halogenation is carried out in the mixture of aqueous hydrogen halide and aqueous hydrogen peroxide in the presence of a water miscible solvent or in the presence of a phase transfer catalyst; or the halogenation is carried out in the mixture of sulfuric acid and an alkali metal salt of aqueous hydrogen halide. The process can be applied preferably on industrial scale.
摘要:
The invention relates to a process for the preparation of cyclopropyl benzyl ketone compounds of formula (II) wherein R1 represents fluorine or chlorine atom or C1-4 alkoxy group, by the reaction of a Grignard reagent, obtained from the reaction of compound of formula (V), wherein X represents chlorine or fluorine atom, with the compound of formula (IV), wherein R2 represents C1-4 alkyl group, having a straight or branched chain. The process can be applied preferably on industrial scale. Compound of formula (II), wherein R represents a fluorine atom in position 2 is an intermediate of the preparation process of prasugrel, which is a platelet inhibitor used in the therapy.
摘要:
The invention provides a process for the preparation of high purity meloxicam of the Formula (II). The meloxicam raw product is reacted with the solution of potassium hydroxide or potassium carbonate, whereby high purity meloxicam potassium sait monohydrate is produced. Said sait is subsequently treated with mineral or organic acid to yield high-purity meloxicam.
摘要:
The invention provides a process for the preparation of high purity meloxicam of the Formula (II). The meloxicam raw product is reacted with the solution of potassium hydroxide or potassium carbonate, whereby high purity meloxicam potassium salt monohydrate is produced. Said salt is subsequently treated with mineral or organic acid to yield high-purity meloxicam.
摘要:
A process for preparing (1R,2S,4R)-(−)-2-[(2′-[N,N-dimethylamino}-ethoxy)]-2-[phenyl]-1,7,7-tri-[methyl]-bicyclo [2.2.1]heptane and pharmaceutically acceptable acid addition salts thereof with higher yields and higher grades of purity.
摘要:
The invention relates to high purity (1R,2S,4R)-(−)-2-[(2′-{N,N-dimethylamino}-ethoxy)]-2-[phenyl]-1,7,7-tri-[methyl]-bicyclo[2.2.1]heptane and pharmaceutically acceptable acid addition salts thereof containing not more than 0.2% of (1R,3S,4R)-3-[(2′-{N,N-dimethylamino}-ethyl)]-1,7,7-tri-[methyl]-bicyclo[2.2.1]heptane-2-one and/or of a pharmaceutically acceptable acid addition salt thereof. Furthermore the invention is concerned with a process for the preparation of these compounds. Moreover the invention relates to medicaments containing 1 or more of these compounds and their use.
摘要:
The invention relates to high purity (1R,2S,4R)-(−)-2-[(2′-{N,N-dimethylamino}-ethoxy)]-2-[phenyl]-1,7,7-tri-[methyl]-bicyclo[2.2.1]heptane and pharmaceutically acceptable acid addition salts thereof containing not more than 0.2% of (1R,3S,4R)-3-[(2′-{N,N-dimethylamino}-ethyl)]-1,7,7-tri-[methyl]-bicyclo[2.2.1]heptane-2-one and/or of a pharmaceutically acceptable acid addition salt thereof. Furthermore the invention is concerned with a process for the preparation of these compounds. Moreover the invention relates to medicaments containing 1 or more of these compounds and their use.
摘要:
The object of the present invention is a one-pot process for preparing the 2-acetoxy-5-(2-fluoro-α-cyclopropyl-carbonyl-benzyl)-4,5,6,7-tetrahydro-4H-tieno[3,2-c]-pyridine (prasugrel) of the formula (I) by reacting the 5,6,7,7a-tetrahydro-4H-tieno[3,2-c]-pyridine-2-on of the formula (II) with 2-bromo-1-cyclopropyl-2-(2-fluorophenyl)-etanone of the formula (III) or with 2-chloro-1-cyclopropyl-2-(2-fluorphenyl)-etanone of the formula (IIIa) and acetylating of the formed compound of the formula (IV), wherein the reaction is carried out in the presence of an organic base with an acetylation agent without isolating the compound of the formula (IV). The coupling and acetylation are carried out in the presence of the same organic base such as triethylamine, N,N-diisopropyl-ethylamine or pyridine. At the end of the process the prasugrel of the formula (I) is purified by recrystallization from an organic solvent or a mixture of solvents.
摘要:
The object of the present invention is a process for preparing the 2-acetoxi-5-(2-fluor-α-cyclopropyl-carbonyl-benzyl)-4,5,6,7-tetrahydro-4H-thieno[3,2-c]pyridine (prasugrel) of the formula (I). The process starts from crystalline 5-trityl-4,5,6,7-tetrahydro-thieno[3,2-c]pyridine of the formula (VI).Further objects of the present invention are two novel crystalline forms of 5-trityl-4,5,6,7-tetrahydro-thieno[3,2-c]pyridine of the formula (VI) and the use thereof for preparing the compound of the formula (V) and process preparing thereof.
摘要:
The object of the present invention is a process for preparing the 2-acetoxy-5-(2-fluor-α-cyclopropyl-carbonyl-benzyl)-4,5,6,7-tetrahydro-4H-tieno[3,2-c]pyridine (prasugrel) of the formula (I). The process starts form crystalline 5-trityl-4,5,6,7-tetrahydro-tieno[3,2-c]pyridine of the formula (VI). Further objects of the present invention are two novel crystalline forms of 5-trityl-4,5,6,7-tetrahydro-tieno[3,2-c]pyridine of the formula (VI) and the use thereof for preparing the compound of the formula (V) and process preparing thereof.