Hydrochloric Acid → HCID 71008676, compound

Participants

Reaction Conditions

Reaction Steps

The product of Example 1f, (2R,6S,13aS,14aR,16aS,Z)-2-(3-fluorophenanthridin-6-yloxy)-6-(5-methylisoxazole-3-carboxamido)-5,16-dioxo-1,2,3,5,6,7,8,9,10,11,13a,14,14a,15,16,16a-hexadecahydrocyclopropa[e]pyrrolo[1,2-a][1,4]diazacyclopentadecine-14a-carboxylic acid (0.812 g, 1.21 mmol) was dissolved in dichloroethane (12 mL) and 4A sieves were added to the flask. To this mixture was added carbonyldiimidazole (505 mg, 3.11 mmol) and the reaction mixture was heated at 40° C. for 2 h. The reaction mixture was cooled to room temperature and 1-methylcyclopropane-1-sulfonamide (426 mg, 3.15 mmol) was added followed by 1,8-diazabicycloundecene (0.548 ml, 3.64 mmol). The reaction mixture was stirred at room temperature for 3 h. and then cooled to 0° C. and 4 N HCl in dioxane (2.5 mL, 10 mmol) was added. The resulting solid was washed copiously with dichloromethane and the filtrate was washed with 2 N HCl and then water. The organic layer was dried over anhydrous magnesium sulfate, filtered, and evaporated under reduced pressure. The residue was purified by flash chromatography on silica gel eluting with acetone/hexane followed by acetone/chloroform to provide the title compound (0.45 g, 47% yield) as a white solid. MS (ESI): m/z=787.2 [M+H]+.

Provenance & Evidence