Pyridine → HCID 18684834, compound

Participants

Reaction Steps

A solution of (S)-(-)-4-[4-[5-(aminomethyl)-2-oxo-3-oxazolidinyl]-2-fluorophenyl]-1-piperidinecarboxylic acid 1,1-dimethylethyl ester (EXAMPLE 20, Step 8, 9.45 g) in dry methylene chloride (96 mL) under N2 is treated with pyridine (5.82 mL) and acetic anhydride (3.40 mL), and the resulting mixture is stirred at ambient temperature for four hours, diluted with methylene chloride (25 mL), washed with water (25 mL), saturated aqueous sodium bicarbonate (25 mL) and saline (25 mL), dried over anhydrous sodium sulfate and concentrated under reduced pressure to give the crude product which is then chromatographed on silica gel (230-400 mesh, 350 g), eluting with a gradient of methanol/chloroform (2.5/97.5-7.5/92.5). Pooling and concentration of those fractions with an Rf =0.51 by TLC (methanol/chloroform, 10/90) gives the title compound, mp 144-146° C.

Provenance & Evidence