Novel Formations of Unsymmetrical 1,2,5-Benzotrithiepins from Olefins and Benzopentathiepin in the Presence of Lewis Acid. Benzopentathiepin as a Novel 1,5-Dipole Synthon

Abstract Some unsymmetrical 1,2,5-benzotrithiepins were synthesized in moderate to good yields by the novel reactions of various olefins with benzopentathiepin (BPT) in the presence of a Lewis acid, trifluoroborane etherate. In this reaction, BPT was found to serve as a 1,5-dipole synthon.