Abstract: The present invention provides a compound of new crystalline form I and form II of 1-[2-[(4-chlorophenyl)phenylmethoxy]ethyl]piperidinium monohydrochloride. The compound of form I has an X-ray diffraction pattern expressed in terms of 2-theta angles that comprises the following peaks: 15.5, 15.9, 17.6, 18.3, 18.8, 19.8, 20.2, 20.8, 21.2, 21.9, 22.9, 24.8, 25.7, 27.7, 28.0, and 30.6 degrees. In addition, the compound of form II has an X-ray diffraction pattern expressed in terms of 2-theta angles that comprises the following peaks: 14.8, 16.7, 17.3, 18.0, 18.2, 19.8, 20.5, 21.1, 22.8, 23.7, 25.0, 25.2, 25.4, 26.4, 27.8, 28.3, 29.0, 29.9, and 31.6 degrees.

Abstract: The present invention provides a process for preparing the amorphous rabeprazole sodium. The process comprises the following steps: (a) Contacting rabeprazole sodium compound with a solvent system to thereby obtain a clear solution under a first temperature, wherein said solvent system is a mixture of at least two categories of organic solvents; (b) Stirring said clear solution of step (a) under a second temperature for a certain time period to obtain a solution containing resultant separated solid, wherein said second temperature is equal to or lower than said first temperature; (c) Filtering said solution containing resultant separated solid obtained from step (b) to obtain a wet solid; and (d) Drying said wet solid to obtain an amorphous rabeprazole sodium compound.

Abstract: The present invention provides a process for preparing optically active timolol. The process comprises the following steps. Firstly, reacting 3-hydroxy-4-morpholino-1,2,5-thiadiazole with an optically active epichlorohydrin in the presence of a solvent system, which has a first volume and a catalyst optionally in the presence of a suitable base to obtain an optically active intermediate product. Secondly, treating the optically active intermediate product with a solution, which has a second volume and comprises tert-butylamine to obtain an optically active timolol. The solvent system used in the first step can be an amide solvent, sulfoxide solvent, cyclic hydrocarbon solvent, ketone solvent, or a heterocyclic solvent. The catalyst used in the first step can be an alkali metal hydroxide, alkali metal carbonate, alkali metal hydrogen carbonate, piperidine, pyridine, triethylamine, potassium hydroxide, sodium hydroxide, potassium carbonate, and other heterocyclic bases.

Abstract: The present invention provides a process for preparing the amorphous rabeprazole sodium. The process comprises the following steps: (a) Contacting rabeprazole sodium compound with a solvent system to thereby obtain a clear solution under a first temperature, wherein said solvent system is a mixture of at least two categories of organic solvents; (b) Stirring said clear solution of step (a) under a second temperature for a certain time period to obtain a solution containing resultant separated solid, wherein said second temperature is equal to or lower than said first temperature; (c) Filtering said solution containing resultant separated solid obtained from step (b) to obtain a wet solid; and (d) Drying said wet solid to obtain an amorphous rabeprazole sodium compound.