Chris am Ende (@chrisamende.bsky.social)

Lewis Acid-Catalyzed Sulfur Fluoride Exchange A new method uses metal Lewis acids as catalysts to convert sulfonyl fluorides, fluorosulfates, and sulfamoyl fluorides with silyl amines into S–N bond-containing compounds via sulfur fluoride exchange. The reaction successfully employs Ca(NTf2)2 as a catalyst to form sulfonamides, sulfamates, and sulfamides using in situ-generated or commercially available silyl amines in 35–99% yields. Other metal Lewis acids are also demonstrated to be catalysts in SuFEx, forming sulfonamides and sulfamates in yields comparable to those of Ca(NTf2)2. https://pubs.acs.org/doi/10.1021/acs.orglett.4c03726