A variety of fluorinated phenols, biaryls, 6H-benzo[c]chromen-6-ones and fluorenones were prepared based on regioselective [3+3] cyclizations of 1,3-bis(silyl enol ethers) with 2-fluoro-3-silyloxy-2-en-1-ones.

Functionalized 3-(trifluoromethyl)phenols were prepared by formal [3+3] cyclization of 1,3-bis(silyl enol ethers) with readily available open-chained and cyclic α,β-unsaturated trifluoromethyl ketones. The reaction of 3,4-dihydro-5-(trifluo-

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