反应详情

A mixture of sodium azide (1.44 g, 22.1 mmol) and (R)-(−)-N-carbobenzyloxy-3-[2-fluoro-4-[5-[[(3-nitrophenylsulfonyl)oxy]-methyl]-2-3-oxazolidinyl]phenyl]azetidine (Example 81, Step 6, 2.60 g, 4.44 mmol) in DMF (30 mL) was stirred for 16 hr, then filtered. The solvent was removed at 38°/0.75 mm and the residue extracted with ethyl acetate (100 mL) and washed with water (3×50 mL) and brine (50 mL). After drying over magnesium sulfate, filtration and evaporation gave a yellow oil. Chromatography over silica gel (150 g, 40-60 μm) eluting with 1-3% methanol-methylene chloride gave the title compound as a pale yellow foam. FAB-HRMS: theory 426.1577 (M+1); meas. 426.1580.

1. filtrationfiltered
2. customThe solvent was removed at 38°/0.75 mm
3. extractionthe residue extracted with ethyl acetate (100 mL)
4. washwashed with water (3×50 mL) and brine (50 mL)
5. dry with materialAfter drying over magnesium sulfate, filtration and evaporation
6. customgave a yellow oil
7. washChromatography over silica gel (150 g, 40-60 μm) eluting with 1-3% methanol-methylene chloride