Gold(I)‐Catalyzed Cyclodehydration Enabled by the Triisopropylsilyl Group: A Synthetically Versatile Methodology

of a triisopropylsilyl group into allyl and allenyl carbinols greatly enhances the efficiency of gold(I)‐catalyzed cyclodehydration, which can provide rapid access to a library of various compounds including 1 H ‐indenes ( Table 2 and Scheme 5 ), benzofulvenes ( Table 3 ), indan‐2‐ones ( Scheme 2 ), fulvenes ( Table 4 ), cyclopentadienes ( Table 4 ), 5 H ‐dibenzo[ a , c ][7]annulenes ( Scheme 6 ) and dibenzosuberones ( Scheme 6 ). The developed method enables unprecedented product generality for several classes of cyclodehydration reactions, which is particularly notable for the preparation of 1 H ‐indenes. The first synthesis of non‐benzo‐fused fulvenes via cyclodehydration of allenyl vinyl carbinols could be accomplished. The protocol is remarkable for mild conditions, operational convenience, and easy access to starting materials.