We have developed a one-pot O-sulfinative
Passerini/oxidation reaction, in which a combination of an
aldehyde, an isocyanide, and a sulfinic acid react, followed by
the addition of mCPBA as an oxidant to give the
corresponding α-(sulfonyloxy)amides in high yields. This
reaction is the first reported demonstration of an isocyanidebased
multicomponent reaction using a sulfinic acid in place of a carboxylic acid. A wide range of aldehydes and isocyanides are
applicable to this reaction.