5468-37-1

Off-white crystalline

Mixed Salt of α-Aminoacetophenone, used in the preparation og pseudopeptidic inhibitors of human sirtuins1-3. This action effectually displays antiproliferative protperties in cancer cells. Also used in the preparation of dual δ/μopiod receptor agonists.

To a stirred solution of phenacyl bromide (1 mmol, 1 equiv) in diethyl ether (13 mL) was added hexamethylenetetramine (1 mmol, 1 equiv) all at once and the mixture was stirred for 12 h at room temperature. The resulting solid was filtered, washed with diethyl ether (15 mL), and dried under reduced pressure to afford the quaternary salt, which was next placed in a two-necked round-bottomed flask fitted with a reflux condenser, and EtOH (22 mL) was added to it. Concentrated HCl (0.6 mL) was added, and the mixture was refluxed for 3 h (solid formed). After cooling to room temperature, the solid was filtered, washed with EtOH (20 mL), and dried under vacuum to afford pure 2-Aminoacetophenone hydrochloride.

Crystallise the salt from Me2CO /EtOH, EtOH/ Et2O, 2-propanol or 2-propanol and a little HCl (slowly after a fe