摘要:
The invention relates to an amorphous form of moxifloxacin hydrochloride and processes for preparing amorphous moxifloxacin hydrochloride. The invention also relates to pharmaceutical compositions that include the amorphous moxifloxacin hydrochloride and use of said compositions for the treatment of bacterial infections.
摘要:
The invention relates to particular hydroxyl and protected hydroxyl derivatives of compounds known to be useful as HMG CoA-reductase inhibitors. In particular, herein are provided hydroxyl and protected hydroxyl compounds of Formula I and their corresponding lactones.
摘要:
The present invention relates to a process for the preparation of N2-Acetyl-9-(1,3-diace-toxy-2-propoxymethyl) guanine, referred to here as N-9 alkylated isomer of structural formula I, and to the use of this compound as an intermediate for the preparation of antiviral compound, ganciclovir.
摘要:
The present invention relates to an improved and cost effective process for the industrial manufacture of cefpodoxime proxetil. More specifically, the present invention relates to the preparation of cefpodoxime proxetil of high purity and yield. The process comprises a) dissolving impure cefpodoxime proxetil or adding a solution containing cefpodoxime proxetil into a polar organic solvent or mixture(s) thereof, optionally reducing the solvent by concentration, and adding into a non-polar organic solvent or mixture(s) thereof to precipitate the solid; and b) dissolving the solid obtained from the above step into water-miscible polar organic solvent, optionally reducing the solvent by concentration, adding it into water to obtain the pure cefpodoxime proxetil.
摘要:
The optically active compound, R (−)-5-[2-[[2-(2-ethoxyphenoxy)ethyl]amino]propyl]-2-hydroxybenzenesulfonamide in good optical purity, a metabolite of the α1-adrenergic blocking agent tamsulosin, and methods for the preparation thereof. Pharmaceutical compositions including the optically active compound and methods of treatment comprising administration of an effective α1-adrenergic antagonistic amount of such compositions to mammals.
摘要:
A novel process for the production of an improved amorphous form of cefpodoxime proxetil [(6R-[6&agr;,7&bgr;(Z))]-7-{E(2-Amino-4-thiazolyl)(methoxyimino)acetyl]amino]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid-1-[[(1-methylethoxy)carboxylic acid-1-[[(1-methylethoxy)carbonyl]oxy]ethyl ester, is described.
摘要:
A novel process of lactonizaton in the preparation of statins (e.g., the HMG--CoA reductase inhibitors lovastatin and simvastatin) employs very mild reaction conditions. The improved process comprises dissolving the open ring hydroxy acid form of the statins in an organic solvent by heating at a temperature, which ranges from ambient to reflux of the solvent, under anhydrous conditions to produce a solution, treating the solution with a mild catalyst at a temperature from about ambient to 50.degree. C., and adding water to the solution to cause the statins in lactone form to crystalize from the reaction mixture. The mild catalyst used in the reaction is a salt of an organic base with an organic or inorganic acid, such as pyridine hydrobromide, pyridine hydrochloride, or pyridinium, p-toluene sulfonate. The organic solvent comprises a lower alkanol, a non-alcoholic polar solvent, or a mixture of the two.
摘要:
A process for preparing simvastatin from lovastatin or mevinolinic acid in salt form comprises treating either starting material with cyclopropyl or butyl amine, the pyranone ring thereby being opened when lovastatin is the starting material, adding a methyl group to the 2-methylbutyrate side chain, and thereafter closing the open pyranone ring to produce simvastatin. The process is performed without protecting and deprotecting the two hydroxy groups of the open pyranone ring. In a preferred embodiment, the starting material is treated with cyclopropyl amine which produces simvastatin via the novel intermediate lovastatin cyclopropyl amide.
摘要:
The present invention relates to substituted pyrrole derivatives, which can be used as 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitors. Compounds disclosed herein can function as cholesterol lowering agents and can be used for the treatment of cholesterol-related diseases and related symptoms. Processes for the preparation of disclosed compounds are provided, as well as pharmaceutical compositions containing the disclosed compounds, and methods of treating cholesterol-related diseases and related symptoms.
摘要:
The present invention relates to salts of HMG CoA reductase inhibitors, and in particular, rosuvastatin amine salts and their use as intermediates in the preparation of rosuvastatin calcium.