2-(Perfluorohexyl)ethanesulfonyl chloride → HCID 53469612, compound

Participants

Reaction Steps

3-chloropropylamine hydrochloride (6.0 g), diaza(1,3)bicyclo[5.4.0]-undecane (DBU, 4.1 g) and 1,2-dimethoxyethane (21.5 g) solvent were placed in the round bottom flask equipped with mechanical stirring under nitrogen. Solution of 2-(perfluorohexyl)ethanesulfonyl chloride CF3(CF2)5(CH2)2SO2Cl (10.1 g), in 1,2-dimethoxyethane (10 g) solvent was added dropwise during 30 minutes at 20-25° C. while stirring at 250 rpm. Then additional DBU (2.6 g) was added. Reaction mixture was stirred for 2 h after the DBU addition was completed. The reaction was monitored by GC to ensure the complete conversion of 2-(perfluorohexyl)ethanesulfonyl chloride. The final reaction mixture was filtered from solids through 2 mm layer of CELITE 545. The solids were washed with 1,2-dimethoxyethane and combined filtrate was evaporated in vacuum to obtain 11.3 g of crude CF3(CF2)5(CH2)2SO2NH(CH2)3Cl as yellow solid. 9.5 g of the crude product was additionally dissolved in hot toluene (7 g) and washed with 14 mL of 2.5 wt % HCl aqueous solution, followed with 12 mL water wash. Toluene solution was evaporated in vacuum to obtain 8.35 g of CF3(CF2)5(CH2)2SO2NH(CH2)3Cl (GC purity 93%, yield 88%).

Provenance & Evidence