A Novel Intramolecular Photo-redox Reaction: Acyclic-Cyclic Interconversion between Dithiol and Disulfide in Thioindigo Derivatives
Synthesis of new thioindigo derivatives containing SH groups at the terminal positions of the side chains, intramolecular S-S bond formation by a photo-redox reaction, and thermal bond scission due to reducing ability of the leuco form are described.