The EtAlCl2-Catalyzed Cargill Rearrangement of Bicyclo[n.2.0] Compounds Prepared by the [2+2] Cycloaddition of Cycloalkenones and 1-t-Butyldimethylsilyl-2-methylthioacetylene

Abstract EtAlCl2 catalyzes the Cargill rearrangement of bicyclo[n.2.0] compounds which were prepared by the TiCl4-mediated [2+2] cycloaddition reaction of cycloalkenones and 1-t-butyldimethylsilyl-2-methylthioacetylene, yielding various bicyclo[n-1.2.1] compounds under mild reaction conditions.