反应详情

温度

50 °C

(3S,7S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-1-methyl-2-oxo-2,3,5,6,7,8-hexahydro-1H-4-oxa-1,6-diaza-anthracene-7-carboxylic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester (3.5 g, 5.37 mmol) was dissolved in 10 mL DMF and sodium bicarbonate (21.5 mmol) and (1-bromo-propyl)-benzene (10.7 mmol) added. The mixture was stirred at 50° C. for 20 h and room temperature for 48 hours. The mixture was poured onto diethyl ether and 10% sodium carbonate. The aqueous layer was extracted with ether and organic layers combined. The organic layer was dried over sodium sulfate and concentrated. The residue was purified over silica (EtOAc-hexanes-DCM-TEA, 0.5/5/4.5/0.02) to provide (3S,7S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-1-methyl-2-oxo-6-((S)-1-phenyl-propyl)-2,3,5,6,7,8-hexahydro-1H-4-oxa-1,6-diaza-anthracene-7-carboxylic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester (803 mg, 1H NMR (400 MHz, d6 acetone): 7.7 (d, 1H), 7.6 (d, 1H), 7.46 (d, 1H), 7.33 (m, 7H), 6.98 (m, 2H), 6.87 (s, 1H), 6.77 (s, 1H), 5.65 (s, 1H), 5.13 (s, 2H), 4.55 (m, 1H), 4.20 (s, 2H), 3.9 (m, 1H), 3.55 (m, 1H), 3.38 (s, 3H), 2.95 (m, 2H), 1.6 (m, 6H), 1.15 (m, 1H), 0.95 (m, 1H) 0.9 (m, 2H), 0.8 (m, 4H), 0.7 (d, 3H), 0.65 (m, 6H).

1. extractionThe aqueous layer was extracted with ether and organic layers
2. dry with materialThe organic layer was dried over sodium sulfate
3. concentrationconcentrated
4. customThe residue was purified over silica (EtOAc-hexanes-DCM-TEA, 0.5/5/4.5/0.02)