Amlodipine → HCID 86591094, compound

Participants

Reaction Conditions

Reaction Steps

Into a 1L three-neck flask, ethanesulfonic acid (11.56 g, 1.05 equivalents) and methanol (200 ml) were poured. To the flask, a solution of amlodipine (40.8 g, 0.1 mole) in methanol (300 ml) was added dropwise. The resulting solution was stirred at 23° C. for 2 hours, cooled to 7° C. and stirred again for 1 hour to produce precipitates. They were washed at 5° C. with methanol (100 ml) and n-hexane (100 ml), filtered, and dried at 35° C. in vacuo to afford 46.4 g of amlodipine ethanesulfonate as a white crystalline solid (Yield 90%).

Provenance & Evidence