Abstract
The Pd-catalyzed cyclization and cross-coupling of hydroxylated alkenes in domino reactions are described. The alkenols undergo Pd-catalyzed cyclization and subsequent cross-coupling reactions with aryl bromides to afford (poly)hydroxylated tetrahydrofuran derivatives. The relationship between the stereoselectivity of the transformation and the steric and/or electronic effects of the substrates has also been studied. The diastereoselectivity of the cyclization of γ-hydroxyalkenes 1, 4–6 is influenced by the allylic hydroxyl functionality in favor of 2,3-cis stereoselectivity. Substitution at the C-1 carbon in alkenitols 7 and 8 ensured the formation of products with 2,5-trans diastereoselectivity (up to >19:1), independent of additional substituents.
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