4-Methylmorpholine → HCID 86708813, compound

Participants

Reaction Steps

(2S,4S)-tert-butyl 2-(5-(7-(2-((2S,5S)-1-(benzyloxycarbonyl)-5-methylpyrrolidin-2-yl)-1H-imidazol-5-yl)-5,10-dihydrochromeno[5,4,3-cde]chromen-2-yl)-1H-imidazol-2-yl)-4-(methoxymethyl)pyrrolidine-1-carboxylate (300 mg, 0.38 mmol) 10 mL ethanol, and 19 mg 10% Pd/C was stirred under an atmosphere of hydrogen (balloon) overnight. Filtration through celite and concentration afforded the crude amine. The crude amine was dissolved in DMF (4 mL) and then (S)-2-(methoxycarbonylamino)-3-methylbutanoic acid (66 mg, 0.38 mmol), HATU (160 mg, 0.42 mmol) and N-methylmorpholine (0.084 mL, 0.76 mmol) were added. After 2 h, the reaction was diluted with EtOAc and washed successively with saturated aqueous NaHCO3, 5% LiCl, and brine. The organic phase was dried over Na2SO4, concentrated, and purified by silica gel chromatography (1% to 20% MeOH/EtOAc) to afford (2S,4S)-tert-butyl 2-(5-(7-(2-((2S,5S)-1-((S)-2-(methoxycarbonylamino)-3-methylbutanoyl)-5-methylpyrrolidin-2-yl)-1H-imidazol-5-yl)-5,10-dihydrochromeno[5,4,3-cde]chromen-2-yl)-1H-imidazol-2-yl)-4-(methoxymethyl)pyrrolidine-1-carboxylate (177 mg, 58%).

Provenance & Evidence