1,1'-Carbonyldiimidazole → Cyclopropanecarboxylic acid, 1-amino-2-ethenyl-, ethyl ester, hydrochloride (1:1), (1R,2S)-

Participants

Reaction Conditions

Reaction Steps

To a solution of (2R,6S,7R,13aS,14aR,16aS,Z)-6-((tert-butoxycarbonyl)amino)-2-((5-chloro-4-methoxyisoquinolin-1-yl)oxy)-7,9-dimethyl-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 (300 mg, 0.43 mmol) in DMF (20 mL) was added 1,1′-carbonyldiimidazole (CDI, 92 mg, 0.57 mmol) at room temperature. The reaction mass was heated at 50° C. for 2 h. To this hot solution was added 1-fluorocyclopropane-1-sulfonamide TFA (166 mg, 0.65 mmol) followed by DBU (135 mg, 0.87 mmol). The resulting solution was stirred at 50° C. for overnight. The reaction mass was diluted with water and extracted with ethyl acetate. The combined organic layer was washed with water, dried over anhydrous Na2SO4 and concentrated under reduced pressure to get desired product as diastereomeric mixture. The diastereomeric mixture was separated by HPLC to get desired product Compound 29 (110 mg, 33%). tert-butyl ((2R,6S,7R,9R,13aS,14aR,16aS,Z)-2-((5-chloro-4-methoxyisoquinolin-1-yl)oxy)-14a-(((1-fluorocyclopropyl)sulfonyl)carbamoyl)-7,9-dimethyl-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]diazacyclopentadecin-6-yl)carbamate MS: MS m/z 808.2 (M++1).

Provenance & Evidence