Acetone → (αS)-α-(2-Chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-acetic acid hydrochloride (1:1)

Participants

Reaction Conditions

Reaction Steps

61 g of (S)-(+)-α-(2-chlorophenyl)-6,7-dihydro-4H-thieno[3,2-c]pyridine-5-acetic acid obtained in Example 5 was added to a mixture of 300 ml of acetone and 15 ml of methanol, and then heated to 40° C. 16.4 ml of concentrated hydrochloric acid was added thereto, and the resulting mixture was stirred at room temperature for 2 hrs, and then, at below 5° C. for at least 2 hrs. The precipitated crystals were filtered, washed with 100 ml of acetone and dried at 40° C. under a reduced pressure, to obtain 61 g of the title compound as a white-yellow solid (yield: 90%).

Provenance & Evidence