反应详情

温度

0 °C

To a 0° C. solution of tert-butyl(3S,4S)-7-cyano-1-((2-methoxynaphthalen-1-yl)methyl)-4-methyl-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-3-ylcarbamate (448 mg, 921 μmol) in CH2Cl2 (9.21 ml) was added pyridine (375 μl, 4.6 mmol), followed by acetyl chloride (78.8 μl, 1.1 mmol), dropwise. The reaction was stirred at 0° C. for 1 h, then allowed to warm to rt and stirred for an additional 20 h, then quenched by the addition of H2O and extracted with CH2Cl2. The combined organic layers were washed with sat. aq. NaHCO3 and sat. aq. NaCl, dried over Na2SO4, filtered, and concentrated. The crude material was purified by flash chromatography to provide tert-butyl(3S,4S)-5-acetyl-7-cyano-1-((2-methoxynaphthalen-1-yl)methyl)-4-methyl-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-3-ylcarbamate (316 mg, 65%) as a white solid. MS m/z 551 (MNa)+.

1. temperatureto warm to rt
2. stirringstirred for an additional 20 h
3. customquenched by the addition of H2O
4. extractionextracted with CH2Cl2
5. washThe combined organic layers were washed with sat. aq. NaHCO3 and sat. aq. NaCl
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe crude material was purified by flash chromatography