| http://www.w3.org/ns/prov#value | - The sulfone is then converted to the corresponding free acid of the formula: utilizing a suitable base, e.g., lithium hydroxide, sodium hydroxide, and the like, including mixtures thereof, in a suitable solvent, such as, for example, THF, acetonitrile, DMF, DMSO, methylene chloride and the like, including mixtures thereof.
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