Acetyl chloride → HCID 67507539, compound

Participants

Reaction Steps

3-{(2S,4S)-1-tert-Butoxycarbonyl-4-{2-[(5-cyano-2-pyridyl)amino]ethyl}amino-2-pyrrolidinylcarbonyl}-1,3-thiazolidine [product of Example 319 (1), 800 mg] and triethylamine (0.42 mL) were dissolved in dichloromethane (20 mL), and acetyl chloride (0.18 mL) was added thereto under ice-cooling. The mixture was stirred at room temperature for 5 hr. The reaction mixture was added to saturated aqueous sodium hydrogencarbonate solution and the mixture was extracted with chloroform. The extract was washed with brine, dried, and concentrated under reduced pressure. The residue was purified by silica gel chromatography to give 3-[(2S,4S)-4-(N-acetyl-N-{2-[(5-cyano-2-pyridyl)amino]ethyl}amino)-1-tert-butoxycarbonyl-2-pyrrolidinylcarbonyl]-1,3-thiazolidine (786 mg) as a white solid.

Provenance & Evidence