摘要:
Processes are disclosed for preparing Telmisartan form A, which is free-flowing and which does not contain electrostatic charge and is thus industrially process-able. The free-flowing Telmisartan form A is prepared by crystallization from a polar organic solvent e.g., DMSO, DMF, DMA, NMP, or water and is suitable for use in pharmaceutical compositions. A process is also disclosed for preparing highly-pure Telmisartan form A by precipitation from aqueous solutions.
摘要:
The present invention provides a crystalline donepezil maleate, which is used as an intermediate in the preparation of donepezil hydrochloride. Also provided are novel processes for producing same in substantially pure form and a process for producing pharmaceutically pure amorphous donepezil hydrochloride therefrom.
摘要:
The present invention provides a crystalline donepezil maleate, which is used as an intermediate in the preparation of donepezil hydrochloride. Also provided are novel processes for producing same in substantially pure form and a process for producing pharmaceutically pure amorphous donepezil hydrochloride therefrom.
摘要:
A process is disclosed for the reduction of (S)-2-amino-6-propionamido-4,5,6,7-tetrahydrobenzothiazole, which comprises reacting (S)-2-amino-6-propionamido-4,5,6,7-tetrahydrobenzothiazole with a borane reagent in the presence of suitable organic solvent to yield (S)-2-amino-6-propylamino-4,5,6,7-tetrahydrobenzothiazole base, which may be converted to an acid addition salt thereof. The process provided herein can be easily, conveniently and inexpensively scaled-up.
摘要:
The present invention provides an intermediate and a process for preparing Telmisartan, which overcomes the drawbacks of conventional methods and produces Telmisartan in high purity and yield.