Triethylamine → 2-(4-(4-((3-Fluoro-4-nitrophenyl)sulfonyl)-1-piperazinyl)phenyl)-1,1,1,3,3,3-hexafluoro-2-propanol

Participants

Reaction Conditions

Reaction Steps

A 25-mL round-bottomed flask was cooled to 0° C. and charged with 1,1,1,3,3,3-hexafluoro-2-(4-(1-piperazinyl)phenyl)-2-propanol dihydro chloride (500 mg, 1.25 mmol, Example 91, Step 1), CH2Cl2 (10 mL) and triethylamine (0.52 mL, 3.74 mmol). 3-Fluoro-4-nitrobenzenesulfonyl chloride (328 mg, 1.371 mmol, Matrix Scientific, Columbia, S.C.) was added and after 10 min the reaction was concentrated onto silica gel and purified via column chromatography (40 g silica gel, 0 to 100% hexanes in EtOAc) to give 2-(4-(4-((3-fluoro-4-nitrophenyl)sulfonyl)-1-piperazinyl)phenyl)-1,1,1,3,3,3-hexafluoro-2-propanol (350 mg).

Provenance & Evidence