In this communication, we report a novel thia-Fries rearrangement (Scheme 1) in which a series of ten aryl N,N-dialkylsulfamates 1 have been isomerised to para-2 and/or ortho-3-hydroxysulfonamides in good yields (Table 1). This is a new and efficient method for synthesising sulfonamides bearing an -OH functionality. ... Since the original report of Rittler 1 of the Fries rearrangement giving hydroxydiarylsulfones, there have been numerous literature references to this ...
