Hydrochloric Acid → Zomepirac

Participants

Reaction Steps

A suspension of 4.0 g. (0.0125 mole) of ethyl 5-(p-chlorobenzoyl)-1,4-dimethylpyrrole-2-acetate in 26 ml. of 0.5 N sodium hydroxide (0.013 mole) is heated under reflux for 30 minutes. The resulting solutions is acidified with dilute hydrochloric acid, and the precipitated solid is collected by filtration, air dried and recrystallized from 2-propanol to give 5-(p-chlorobenzoyl)-1,4-dimethylpyrrole-2-acetic acid as a white crystalline solid, m.p. 178-179° C. Anal. Calcd. for C15H14 ClNO3: C, 61.76; H, 4.83; N, 4.82%. Found: C, 61.68; H, 4.96; N, 4.89%.

Provenance & Evidence