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| Number | Title | Issue Date |
| 7291746 | Process for obtaining an antiepileptic agent A process for obtaining the pharmaceutical active ingredient, levetiracetam, by means of deaminomethylation of a sufficiently pure enantiomer intermediate (S)-(II), or by means of deaminomethylation of an addition salt thereof with an acid, wherein R1 and... | 11/06/2007 |
| RE39888 | Process for obtaining quinapryl hydrochloride and solvates useful for isolating and purifying quinapryl hydrochloride The process for obtaining quinapril hydrochloride (I) comprises the stages of: a) hydrogenolysis of the benzyl ester of quinapril (II) by treatment in an alcoholic solvent, with concentrated hydrochloric acid or a solution of hydrogen chloride in isopropanol, and hy... | 10/16/2007 |
| 5082941 | Process for preparing the piperazine salt of 2,5-dihydroxybenzenesulphonic acid monotosylate The process is characterized in that the diethylamine salt or the ammonium salt of 2,5-dihydroxybenzenesulphonic acid is used as starting material, which salt is tosylated in an ammoniacal medium to lead in both cases to the production of the ammonium sal... | 01/21/1992 |
