Abstract
Baylis-Hillman adducts undergo smooth oxidative Mukaiyama-Michael addition and a subsequent cyclization with silyl enol ethers in the presence of Dess-Martin periodinane (DMP) and pyridine under mild reaction conditions to afford a new class of dihydropyran derivatives in good yields with high diastereoselectivity. This is the first report on the preparation of cis-fused dihydropyrans from Baylis-Hillman adducts and silyl enol ethers.
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