Stereoconvergent ‘one-pot’ tandem [2,3]-Wittig-anionic oxy-Cope rearrangement of acyclic bis-allylic ethers in the diastereoselective synthesis of substituted tetrahydropyrans
Abstract
The unsaturated alcohols derived from a ‘one-pot’ tandem [2,3]-Wittig-anionic oxy-Cope (AOC) rearrangement undergo a halocyclisation reaction with iodine in acetonitrile to give substituted tetrahydropyrans with a high degree of stereocontrol.