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
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.