反应详情

A mixture of (2R,6S,7R,13aS,14aR,16aS,Z)-6-((tert-butoxycarbonyl)amino)-2-((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 (70 mg, 0.108 mmol), CDI (34.9 mg, 0.215 mmol) in tetrahydrofuran (3 mL) was refluxed for 2 h. It was then cooled to rt and cyclobutanesulfonamide (32.0 mg, 0.237 mmol) was added and followed by DBU (0.036 mL, 0.237 mmol). The mixture was stirred at rt for 16 h. It was then concentrated and purified by silica gel chromatography, eluting with 40% acetone/hexane to isolate 70 mg of the diastereomers tert-butyl ((2R,6S,7R,13aS,14aR,16aS,Z)-14a-((cyclobutylsulfonyl)carbamoyl)-2-((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]diazacyclopentadecin-6-yl)carbamate that was used as it was.

1. temperaturewas refluxed for 2 h
2. concentrationIt was then concentrated
3. custompurified by silica gel chromatography
4. washeluting with 40% acetone/hexane