4-Methylmorpholine → bis(2-methyl-2-propanyl){[4-({(2S,4R)-2-(5-{4-[(methoxycarbonyl)amino]phenyl}-1H-imidazol-2-yl)-4-[1-(methylsulfonyl)-4-piperidinyl]-1-pyrrolidinyl}carbonyl)-1-piperidinyl]methylylidene}biscarbamate

Participants

Reaction Steps

To a solution of the compound prepared in Example 66 (0.11 g, 0.25 mmol) in dichloromethane (5.0 mL) and N,N-dimethylformamide (2.0 mL) was added 1-hydroxy-7-azabenzotriazole (0.034 g, 0.25 mmol), followed by N-methyl morpholine (0.075 g, 0.74 mmol), l-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.095 g, 0.50 mmol) and the compound prepared in Example 7 (0.10 g, 0.27 mmol). The reaction was stirred at room temperature under nitrogen overnight whereupon it was concentrated under reduced pressure. The resultant residue was diluted with dichloromethane (20 mL), washed with brine (10 mL), dried and concentrated. Purification by flash chromatography (silica gel, 12 g, 0-5% methanol/dichloromethane) and trituration from methanol and methyl tert-butyl ether afforded the title compound (0.067 g, 38%) as a yellow solid.

Provenance & Evidence