Water → HCID 59681877, compound

Participants

Reaction Steps

Water (20 mL) and MeOH (80 mL) were added to ethyl 2-(2-phenylpropionylamino)-4,5,6,7-tetrahydrobenzthiazol-4-carboxylate (R) (4.95 g, 13.8 mmol) and NaOH (5.52 g, 0.138 mol), and the resultant mixture was stirred at RT under a blanket of nitrogen as inert gas until completion of the reaction. Following removal of MeOH, 2N hydrochloric acid solution in water (250 mL) and DCM (250 mL) were added. The phases were separated, and the aqueous phase was extracted a number of times with DCM (a total of 200 mL). Following drying of the combined organic phases over Na2SO4 and filtration, there was obtained the product 2-(2-phenylpropionylamino)-4,5,6,7-tetrahydrobenzthiazol-4-carboxylic acid (S) in a yield of 4.6 g (corresponding to 100% of theory).

Provenance & Evidence