Convenient Access to Conformationally Rigid Sultams.
Dmitry DibchakValeriya ShcherbacovaAleksandr V DenisenkoPavel K MykhailiukPublished in: Organic letters (2019)
Synthesis of the previously unknown conformationally rigid sultams fused with the cyclobutane ring was developed. The key transformation was an intramolecular photochemical cyclization of linear sulfonamides. Crystallographic analysis showed that the obtained structures populated the uncharted region in the chemical space.