Fluorinated ?-sultones

Chlorosulfates

“…Now XII, prepared independently (eq 55), did not react with excess piperidine to yield X, and hence XII was not an intermediate in reaction 54. It must therefore be concluded that in the primary reaction of phenyl chlorosulfate with (^NH 0SO.C! Ph0S02-XI XII (55) piperidine the phenoxy group is displaced from sulfur in preference to chlorine yielding the piperidinium sulfonyl chloride (XI), which with excess piperidine gives sulfone X.…”