Potassium Hydroxide → HCID 178426257, compound

Participants

Reaction Steps

Pemirolast free acid was prepared by dissolving pemirolast potassium in water and acidifying to pH 1 with 6M HCl which caused the free acid to precipitate from solution. The crystals formed were filtered, washed with water and dried under vacuum. Pemirolast potassium was in turn prepared analogously to the methodology described in Example 4 (steps Ia and Ib) below, using 2M KOH instead of 2M NaOH, and recrystallising from water:isopropanol in a 1:2, instead of a 2:1, ratio.

Provenance & Evidence