Several π-deficient 2-(arylsulfonyl)ethyl groups have been
studied as carboxylic acid protecting groups. The 2-[3,5-bis(trifluoromethyl)phenylsulfonyl]ethyl
group is the most easily removed protecting group for acids under
mild basic conditions using aqueous NaHCO3.
alcohols - carboxylic acids - eliminations - protecting groups - sulfones