| abstract |
The present invention provides a novel fluorosulfonic acid and a salt thereof, and a synthetic intermediate thereof, which have a stable and high acidity as compared with conventional fluorosulfonic acids. Furthermore, the present invention also provides a method for producing a novel fluorosulfonic acid capable of easily synthesizing various derivatives and uses thereof. Specifically, general formula (1): R—S (═O) n —CF 2 —SO 3 H (1) (wherein R is a group bonded to an adjacent sulfur atom and a carbon atom, An alkyl group that may have a group, a haloalkyl group that may have a substituent, an alkenyl group that may have a substituent, a haloalkenyl group that may have a substituent, and a substituent A alkynyl group which may have a substituent, a haloalkynyl group which may have a substituent, a cycloalkyl group which may have a substituent or the like, and n represents 1 or 2, or a salt thereof provide. |