Dichloroacetyl chloride → HCID 15887433, compound

Participants

Reaction Conditions

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, 400 mg) in dry methylene chloride (4.1 mL) at 0° C. under N2 is treated with triethylamine (0.21 mL) and dichloroacetyl chloride (0.11 mL), and the resulting mixture is stirred at 0° C. for three hours, diluted with methylene chloride (10 mL), washed with water (10 mL), saturated aqueous sodium bicarbonate (10 mL) and saline (10 mL), dried over anhydrous sodium sulfate and concentrated under reduced pressure to give the crude product which is then chromatographed on silica gel (70-230 mesh, 50 g), eluting with methanol/chloroform (5/95). Pooling and concentration of those fractions with an Rf=0.53 by TLC (methanol/chloroform, 10/90), trituration with methylene chloride/diethyl ether and filtration gives the title compound, mp 168-170° C.

Provenance & Evidence