SYNTHESIS AND PHOTOREACTION OF 4,5,7-TRI-T-BUTYL BENZO[C]THIOPHENE - A NOVEL BENZO[C]THIOPHENE DERIVATIVE AND ITS DEWAR ISOMER

摘要

4,5,7-Tri-t-butylbenzo[c]thiophene (1) has been successfully synthesized via cyclic sulfite (7) in high yield. Upon irradiation,l undergoes photovalence isomerization to afford the 3,4,6-tri-t-butylbenzo[1,2]cyclobutene sulfide (2) as a first example of Dewar benzo[c]thiophene. [References: 7]