Acetic Acid → HCID 86761240, compound

Participants

Reaction Steps

A solution of 4-(S)-benzyl-3-[3,3-bis-(4-chloro-phenyl)-propionyl]-oxazolidin-2-one (2.0 g, 4.4 mmol) in THF (25 mL) was cooled to −78° C. and added via cannula to a solution of potassium bis(trimethylsilyl)amide (0.5 M in toluene, 9.7 mL, 4.8 mmol) in THF (15 mL) at −78° C. After 30 min at −78° C., a solution of 2,4,6-triisopropylbenzenesulfonyl azide (1.77 g, 5.7 mmol) in THF (15 mL) was cooled to −78° C. and added via cannula. After 1 min, the reaction was quenched by addition of AcOH (1.2 mL, 21 mmol). The cooling bath was removed, and the mixture was allowed to warm to rt and stir overnight. The reaction mixture was diluted with water and extracted with DCM (3×). The combined organic extracts were dried (Na2SO4) and concentrated. The residue was purified by flash chromatography (EtOAc/hexanes) to provide 1.58 g (72%) of the desired azide as a white foam. 1H NMR (400 MHz, CDCl3): 7.38-7.15 (m, 13H), 5.94 (d, J=11.0, 1H), 4.50 (d, J=11.0, 1H), 4.34-4.25 (m, 1H), 4.08 (dd, J=9.2, 2.4, 1H), 3.76 (dd, J=8.8, 8.1, 1H), 3.22 (dd, J=13.5, 3.3, 1H), 2.77 (dd, J=13.5, 9.5, 1H).

Provenance & Evidence