Isobutyl chloroformate → HCID 90052614, compound

Participants

Reaction Steps

To a solution of 4-dimethylaminocrotonic acid hydrochloride (307 mg) in N,N-dimethylformamide (9 mL), N-methylmorpholine (682 μL) was added under ice cooling, and the mixture was stirred at the same temperature for 5 minutes. Then, isobutyl chloroformate (204 μL) was added to the mixture under ice cooling, and the mixture was stirred at the same temperature for 3 minutes. To the reaction mixture, (S)—N-(5-(2-((3-fluorophenyl)amino)-4-(propylamino)pyrimidin-5-yl)-4-pentyn-1-yl)-2-(methylamino)propanamide (F6) dihydrochloride (300 mg) was added under ice cooling, and the mixture was stirred at the same temperature for 1 hour and 30 minutes. To the reaction mixture, saturated aqueous sodium hydrogencarbonate (10 drops) were added, and the solvent was evaporated under reduced pressure. The obtained residue was purified by basic silica gel column chromatography (eluent, 100 to 90% ethyl acetate in methanol) to obtain (S,E)-4-(dimethylamino)-N-(1-((5-(2-((3-fluorophenyl)amino)-4-(propylamino)pyrimidin-5-yl)-4-pentyn-1-yl)amino)-1-oxopropan-2-yl)-N-methyl-2-butenamide (7-1, 208 mg).

Provenance & Evidence