Novel chiral xylofuranose-based phosphinooxathiane and phosphinooxazinane ligands for palladium-catalyzed asymmetric tandem allylic allylation

Novel chiral xylofuranose-based phosphinooxathiane and phosphinooxazinane ligands have been synthesized and found to be effective ligands for palladium-catalyzed asymmetric tandem allylic allylations of 1,4-diacetoxy-cis-2-butene with 2-(benzylamino)ethanol or 1,2-bis[benzylamino]ethane to give chiral 4-benzyl-2-vinylmorpholine (94% ee) or 1,4-dibenzyl-2-vinylpiperazine (70% ee).