摘要:
A novel process for the preparation of 1'-hydroxy-2'-substituted cyclohexyl azetidin-2- one compound of formula 2, which is important intermediate in the synthesis of trinems, is described by epoxide ring opening of (3S,4R)-3-[(1R)-1-(tert- butyldimethylsilyloxy)ethyl]-4-[(1'R,2'S,3'R)-1',2'-epoxycyclohexan-3'-yl]azetidin-2-one of formula 1 with the nucleophile compound of formula RYH, where nucleophile may act as solvent itself if the nucleophile is in the liquid form, in a suitable solvent and in the presence of a suitable catalyst from the group of salt of trifluoromethane sulfonic acid, preferably ytterbium (III) trifluoromethanesulfonate, stannous (II) trifluoromethanesulfonate or dysprosium (III) trifluoromethanesulfonate, under a) ultrasonic irradiation or b) under microwave irradiation of the reaction mixture following by isolation and purification of the desired compound. A variant of the novel process describes ring epoxide opening of the starting compound of formula 1 with the compound of formula NH 4 X in a suitable solvent under a) microwave irradiation or b) without microwave irradiation to obtain the desired compound of formula 2. Instead of compound of formula 1 a compound of formula 6 may be used as starting compound where any other suitable hydroxy protecting group known in the art may be used in the formula of the starting compound.
摘要:
The present invention relates to A pharmaceutical composition with broad-spectrum of activity against class A, class C and D enzymes comprising an antibiotic and a pharmaceutically effective amount of a compound of formula (I)
compounds of formula (I), the use of a therapeutically effective amount of one or more compounds of formula (I) as a broad-spectrum beta-lactamase inhibitor and the use of such a pharmaceutical composition for the treatment of an infection in humans or animals caused by bacteria.
摘要:
The process for synthesis of statins is presented where the intermediate intermediate (4 R ,6 S )-6-(dialkoxymethyl)tetrahydro-2 H -pyran-2,4-diol which already possesses the desired stereochemistry corresponding to final statin is prepared by an aldolaze.
摘要:
The process for synthesis of statins featuring the use of an early intermediate (4 R ,6 S )-6-(dialkoxymethyl)tetrahydro-2 H -pyran-2,4-diol which already possesses the desired stereochemistry corresponding to final statin.
摘要:
The present invention relates to novel polymorphic forms of N-piperidino-5-(4-chlorophenyl)-1-(2, 4-dichlorphenyl)-4-methyl-3-pyrazolecarboxamide and to novel methods for their preparation. More particularly the invention relates to the preparation of a monohydrate of N-piperidino-5-(4-chlorophenyl)-1-(2, 4-dichlorphenyl)-4-methyl-3-pyrazolecarboxaniide rimonabant and to a novel anhydrous form of N-piperidino-5-(4-chlorophenyl)-1-(2, 4-dichlorphenyl)-4-methyl-3-pyrazolecarboxamide, and to pharmaceutical compositions thereof.
摘要:
The present invention relates to a stable pharmaceutical composition comprising sirolimus. The pharmaceutical composition comprises sirolimus in amorphous form, a fatty acid ester and a pharmaceutically acceptable polymer wherein the fatty acid ester is present at a concentration of less than 10% w/w compared to the total weight of the composition.
摘要:
The present invention relates to the preparation of a recombinant polypeptide, which polypeptide upon expression has been secreted into the periplasm of a transformed host cell. In particular, this invention relates to a process to enhance the extraction yield of said recombinant polypeptide from the periplasm before further downstream processing.
摘要:
The present invention discloses a combination preparation comprising an active pharmaceutical ingredient (API) and a pharmaceutically acceptable solid support, wherein said solid support is in a water-insoluble particulate form and comprises a material selected from silicic acid, aluminum hydroxide and titanium hydroxide, wherein said API is a compound having both, at least one hydrophobic structural moiety causing the API to have low solubility in water or in an aqueous solution, and multiple hydrophilic groups arranged to form multiple intermolecular interactions to said solid support involving polar or ionic or hydrogen bonding, wherein the hydrophilic groups of the API are independently equal or different and comprise at least one of the group consisting of OH- and halogen-groups; wherein said API is bound to said solid support by adsorption, and wherein a major proportion of said API is in the amorphous state. The present invention also discloses a pharmaceutical preparation comprising such a combination preparation as well as a method for producing such a combination preparation.