Sodium Carbonate-Promoted Formation of 5-Amino-1,2,4-thiadiazoles and 5-Amino-1,2,4-selenadiazoles with Elemental Sulfur and Selenium
Jun-Xu Lin, Guohui Liu, Li-Qiu Liu, Ying‐Chun Wang, Yan He
Abstract
Sodium carbonate-promoted facile synthesis of 5-amino-1,2,4-thiadiazoles and 5-amino-1,2,4-selenadiazoles with elemental sulfur and selenium, respectively, was developed. This method was carried out with O 2 in the air as the green oxidant, and it has several advantages, including low cost, low toxicity, and stable sulfur and selenium sources, good to excellent yields with water as the sole byproduct, simple operation, and a broad substrate scope. Preliminary mechanistic studies indicate that the formation of the 1,2,4-thiadiazole ring and the 1,2,4-selenadiazole ring undergoes different processes.
Topics & Concepts
SulfurSeleniumChemistryThiadiazolesSodium carbonateCarbonateOrganic chemistrySodiumInorganic chemistrySulfur-Based Synthesis TechniquesOrganoselenium and organotellurium chemistrySynthesis and biological activity