Gold superacid-catalyzed preparation of benzo[c]thiophenes
作者:Wouter Debrouwer、Ruben A. J. Seigneur、Thomas S. A. Heugebaert、Christian V. Stevens
DOI:10.1039/c4cc07989b
日期:——
A three-step synthesis of benzo[c]thiophenes is presented in which the key transformation is the gold-catalyzed 5-exo-dig migratory cycloisomerization of a diallyl thioacetal. It was shown that a small amount of in situ generated HAuCl4 from AuCl3 is the active catalytic species. A mechanism was proposed.