Hydrochloric Acid → HCID 67682288, compound

Participants

Reaction Conditions

Reaction Steps

A solution of (S)-tert-butyl 2-(5-(9,9-difluoro-7-(2-((1R,3S,4S)-2-((S)-2-(methoxycarbonylamino)-3-methylbutanoyl)-2-azabicyclo[2.2.1]heptan-3-yl)-1H-benzo[d]imidazol-6-yl)-9H-fluoren-2-yl)-1H-imidazol-2-yl)pyrrolidine-1-carboxylate (106 mg, 0.13 mmol), methanol (1.5 mL), and 4M HCl in dioxane (1.5 mL, 6 mmol) was stirred at room temperature. The reaction was thoroughly concentrated after thirty minutes. The resulting residue was dissolved in a 4:1 dichloromethane:dimethylformamide solution (1.3 mL). To this solution was added (R)-2-(methoxycarbonylamino)-2-phenylacetic acid (28 mg, 0.13 mmol) and COMU (56 mg, 0.13 mmol) and the reaction was cooled to 0° C. Diisopropylethylamine (0.092 mL, 0.53 mmol) was added and the reaction was stirred at 0° C. for twenty minutes. The reaction was quenched by the addition of formic acid (0.05 mL) and thoroughly concentrated. The resulting residue was purified by preparative reverse phase HPLC (Gemini, 10 to 60% ACN/H2O+0.1% TFA) to yield methyl (R)-2-((S)-2-(5-(7-(2-((1R,3S,4S)-2-((S)-2-methoxycarbonylamino-3-methylbutanoyl)-2-azabicyclo[2.2.1]heptan-3-yl)-1H-benzo[d]imidazol-6-yl)-9,9-difluoro-9H-fluoren-2-yl)-1H-imidazol-2-yl)pyrrolidin-1-yl)-2-oxo-1-phenylethylcarbamate (28 mg, 24%). LCMS-ESI+: calculated for C50H50F2N8O6: 897.0; observed [M+1]+: 898.1.

Provenance & Evidence