Sodium Hydroxide → 2-(4,5-Diphenyl-1,3-oxazol-2-ylthio)acetic acid

Participants

Reaction Steps

10 g ethyl S-(4,5-diphenyloxazol-2-yl)-mercaptoacetate dissolved in 30 ml ethanol were mixed with 30 ml 40% NaOH and maintained for 1 hour at room temperature. The sodium salt which separated from the reaction mixture was redissolved by means of addition of 200 ml distilled water. The alkaline solution was slowly poured into 300 ml ice-cooled 15% HCl. The precipitated S-(4,5-diphenyloxazol-2-yl)-mercaptoacetic acid was filtered, washed with water and crystallized from aqueous ethanol to give 7.4 g of a product melting at 137°-139° C (yield = 80.7%).

Provenance & Evidence