PROCESS FOR THE PREPARATION OF LYSIN SALTS OF ACID 5-(P-CHLOROBENZOYL)-1,4-DYMETIL-PYRROL-2-ACETIC WITH ANALGESIC ACTIVITY

摘要

Salts of L'lysine or DL-lysine with 5-(p-chlorobenzoyl)-1 ,4-dimethyl- pyrrole-2-acetic acid, having the formula (A): in which I is the said acid and II represents L-lysine or DL-lysine are prepared by reacting equimolecular quantities of L-lysine or DL-lysine with 5-(p- chlorobenzoyl)-1,4-dimethyl-pyrrole-2-acetic acid in the presence of water or water and alcohol at temperatures between 0 DEG C and 100 DEG C. They have analgesic activity and can be incorporated into pharmaceutical compositions.