Synthesis of Thiohydroxamic Acids and Thiohydroximic Acid Derivatives

An improved and expanded preparation of thiohydroxamic acids is reported along with a one-pot conversion of these compounds to novel thiohydroximic acid derivatives. A variety of aryl, heteroaryl, and alkyl substituents are well tolerated to provide a rapid approach to alkene-functionalized thiohydroximic acids that serve as potentially useful building blocks for organic synthesis.