反应详情

温度

0 °C

To a solution of (±)-trans-[3-azido-4-hydroxy-piperidine-1-carboxylic acid tert-butyl ester (Example 112, 1.24 mmol, 0.3 g) in DCM (4 mL) at 0° C. was added Dess-Martin periodinane (1.48 mmol, 0.63 g) portion wise, and the reaction was stirred for 8 h. The reaction was diluted with DCM (5 mL), cooled to 0° C., and quenched with Na2S2O3 solution, organic layer was separated and washed with saturated NaHCO3 solution, water, brine and dried (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified on a SiO2 cartridge with 5% ethyl acetate in hexanes-30% ethylacetate in hexanes to provide 3-azido-4-oxo-piperidine-1-carboxylic acid tert-butyl ester.

1. customquenched with Na2S2O3 solution, organic layer
2. customwas separated
3. washwashed with saturated NaHCO3 solution, water, brine
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified on a SiO2 cartridge with 5% ethyl acetate in hexanes-30% ethylacetate in hexanes