[F:1][C:2]([F:8])([F:7])[S:3]([NH2:6])(=[O:5])=[O:4].[F:9][C:10](=[C:15]([F:17])[F:16])[CH2:11][C:12](Cl)=[O:13]>[OH-].[Na+]>[F:9][C:10](=[C:15]([F:17])[F:16])[CH2:11][C:12]([NH:6][S:3]([C:2]([F:8])([F:7])[F:1])(=[O:5])=[O:4])=[O:13]To an ice-cooled solution of trifluoromethanesulfonamide (2.75 g, 18.4 mmol) in 7.4 mL of 2.5 N sodium hydroxide was added 3,4,4-trifluoro-3-butenoyl chloride (2.93 g, 18.5 mmol) with stirring in 2 min. The mixture was stirred in cold for 30 min and the white precipitate formed was filtered, washed with cold water (10 mL) and dried to give 0.82 g (16%) of the desired product as a white solid. m.p. 115°-120° C.
Wird geladen…