Benzyl Alcohol → Benzyl 1-{{{[2(R)-Hydroxycyclopent-1(R)-yl]oxy}carbonyl}aminomethyl}-1-Cyclohexane Acetate

To a stirred solution of compound (49) (0.5 g, 1.67 mmol), 1,3-dicyclohexylcarbodiimide (1.0 g, 5.0 mmol) and DMAP (19 mg, 0.16 mmol) in dichloromethane (100 mL) at room temperature under nitrogen atmosphere was added benzyl alcohol (1.1 mL, 10 mmol). The reaction mixture was stirred at room temperature for 15 h (monitored by tlc and LC/MS), then filtered, and the white solid was washed with dichloromethane (2×15 mL). The combined filtrates were washed with water (2×25 mL), dried over Na2SO4 and concentrated in vacuo. The crude product was purified using flash chromatography on silica gel using hexane/ethyl acetate (2:1) as eluant to provide 0.51 g (78%) of compound (50) as a colorless liquid. 1H NMR (400 MHz, CDCl3): δ1.36–1.75 (14H, m); 1.99–2.10 (2H, m); 2.35 (2H, s); 3.17 (2H, d, J=6.8 Hz); 4.05 (1H, m); 4.65 (1H, m); 5.12 (2H, s); 5.34 (1H, t, J=6.8 Hz); 7.36 (5H, m). MS (ESI): m/z=390.22 (M+H+).

1. filtrationfiltered
2. washthe white solid was washed with dichloromethane (2×15 mL)
3. washThe combined filtrates were washed with water (2×25 mL)
4. dry with materialdried over Na2SO4
5. concentrationconcentrated in vacuo
6. customThe crude product was purified

ORDレコード

ord-393f63016bf14db39e04c7918dd66553

出典データセット

uspto-grants-2006_04

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07026351B2