1,1,2,2-Tetrafluoro- 2- (polyfluoroalkoxy)ethanesulfonyl Fluorides

Abstract

Several new l,l,2,2-tetrafluoro-2-(polyfluoroalkoxy)ethanesulfonyl fluorides, RfOCF2CF2S02F (Rf= CF3CH2, CF3CF2CH2, CF3CF2CF2CH2, CH3CH2, C(CF3)2H, CF3CH(CF3), CH3C(CF3)2, CH2CF2CF2CF2CH2, and C(CH20)4), were prepared in good yield by fluorinating their corresponding esters with SF4in anhydrous hydrogen fluoride. Under the conditions used, cleavage of the acyl-oxygen bond or the carbon-sulfur bond was negligible. In addition, CF3CH2OCF2CF2S02OCH2CF3and CF3CH2-0CF2CF2S02N(CH3)2were formed when CF3CH20CF2CF2S02F was reacted with CF3CH2OH and (CH3)2NH. © 1987, American Chemical Society. All rights reserved.