TBAI-Catalyzed Reaction between N-Tosylhydrazones and Sulfur: A Procedure toward 1,2,3-Thiadiazole

A TBAI-catalyzed reaction between N-tosyl hydrazone and sulfur was developed, leading to 1,2,3-thiadiazoles in moderate to good yields. It represents a facile and practical procedure to access thiadiazole under metal-free conditions. This procedure serves as an improvement for the Hurd–Mori reaction.