The ene reaction between an enol and an alkyne is an established synthetic reaction with respect to its five-membered-ring-forming variant, known as the Conia reaction.[1, 2] Recent reports on transition-metal catalysis have described several examples of the extension of the reaction to six-and seven-membered carbocycles,[2a, f, i, 3] yet it is entirely unknown whether or not the reaction is applicable to the synthesis of larger rings. Herein, we report ...
