Methanesulfonyl chloride → HCID 86670450, compound

Participants

Reaction Conditions

Reaction Steps

A 150-mL round-bottomed flask was charged with tert-butyl (3R)-3-(hydroxymethyl)-4-(4-(2,2,2-trifluoro-1-hydroxy-1-(trifluoromethyl)ethyl)phenyl)-1-piperazinecarboxylate (0.393 g, 0.857 mmol), DIPEA (0.450 mL, 2.58 mmol) and EtOAc (5 mL). The reaction mixture was cooled to 0° C. and methanesulfonyl chloride (0.095 mL, 1.2 mmol, Sigma-Aldrich, St. Louis, Mo.) was added dropwise. The mixture was stirred at 0° C. for 1 h. At that time, 4 drops of methanesulfonyl chloride was added and stirring at 0° C. resumed for 10 min. The material was directly purified by column chromatography (25 g of silica, 0 to 50% EtOAc in hexanes) to afford tert-butyl (3R)-3-(((methylsulfonyl)oxy)methyl)-4-(4-(2,2,2-trifluoro-1-hydroxy-1-(trifluoromethyl)ethyl)phenyl)-1-piperazinecarboxylate (0.311 g) as a white foam.

Provenance & Evidence