Stereoselective Synthesis of Substituted Tetrahydropyrans and Isochromans by Cyclization of Phenylseleno Alcohols
作者:Andrea Temperini、Anna Barattucci、Paola Maria Bonaccorsi、Ornelio Rosati、Lucio Minuti
DOI:10.1021/acs.joc.5b01199
日期:2015.8.21
A selenium-mediated strategy for the stereoselective synthesis of substituted tetrahydropyrans and isochromans has been developed starting from 5-phenylseleno ketones. After enantioselective reduction, the chiral nonracemic phenylseleno alcohols were oxidized to the conesponding selenones, which underwent an effcient 6-exo-tet ring-closure reaction.