Acetic Anhydride → HCID 68510668, compound

Participants

Reaction Steps

To a 0° C. solution of compound 49 (0.16 g, 0.45 mmol) in dry CH2Cl2 (5 mL) was added Ac2O (0.25 mL, 2.70 mmol) followed by dropwise addition of Et3N (0.25 mL, 1.80 mmol). The reaction was stirred for 2 h under N2. The reaction mixture was diluted with CH2Cl2 (40 mL), washed with saturated NaHCO3 (10 mL), water (2×10 mL), and saturated NaCl (2×10 mL). Dried over MgSO4 and filtered. The solvent was removed under reduced pressure and the product was purified by column chromatography (EtOAc/hexanes 3:7) to afford 51 as a white solid (154 mg, 86%); MS m/z: 398 (M+H)+. Anal. Calcd. For, C20H19N3O2S2: C, 60.43; H, 4.82; N, 10.57; S, 16.13. Found: C, 60.54; H, 4.91; N, 10.41; S, 15.87.

Provenance & Evidence