Synthesis of Thioesters by Simultaneous Activation of Carboxylic Acids and Alcohols Using PPh<sub>3</sub>/NBS with Benzyltriethylammonium Tetrathiomolybdate as the Sulfur Transfer Reagent
A new and simple route for the synthesis of thioesters starting from carboxylicacids and alcohols is reported by usingtetrathiomolybdate as the key sulfurtransferreagent. Triphenylphosphane and N-bromosuccinimide were used for the activation of the carboxylicacid and alcohol in the same pot followed by the transfer of sulfur from tetrathiomolybdate. Thioesters were obtained in good to moderate