反应详情

HATU (9.88 g, 25.99 mmol) was added to a solution of (R)—N-(7-fluoro-1,1-dimethyl-2,3-dihydro-1H-inden-5-yl)-2-methoxy-5,6,7,8-tetrahydro-1,6-naphthyridine-5-carboxamide (8.0 g, 21.65 mmol), DIEA (7.40 mL, 43.31 mmol) and the crude cis-3-((benzyloxy)carbonyl)cyclobutanecarboxylic acid (6.59 g, 28.15 mmol) in DMF (150 mL) at room temperature, and the mixture was stirred at room temperature for 5 hr. To the reaction mixture was added water, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and brine, and dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (solvent gradient; 20→50% ethyl acetate/hexane). The obtained solid was recrystallized from ethyl acetate/hexane to give the title compound (5.50 g, 9.39 mmol, 43.4%) as white crystals.

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic layer was washed with water and brine
3. dry with materialdried over magnesium sulfate
4. customthe solvent was evaporated under reduced pressure
5. customThe obtained residue was purified by silica gel column chromatography (solvent gradient; 20→50% ethyl acetate/hexane)
6. customThe obtained solid was recrystallized from ethyl acetate/hexane