Asymmetric Synthesis by the Intramolecular Haloetherification Reaction of Ene Acetal: Discrimination of Prochiral Dienes in Cyclohexane Systems
作者:Hiromichi Fujioka、Naoyuki Kotoku、Yoshinari Sawama、Hidetoshi Kitagawa、Yusuke Ohba、Tsung-Lung Wang、Yasushi Nagatomi、Yasuyuki Kita
DOI:10.1248/cpb.53.952
日期:——
A novel asymmetricsynthesis of the cyclohexane derivative functionalized by some substituents has been developed from the diene acetals (1), prepared from the corresponding diene aldehyde and (+)-hydrobenzoin. The treatment of 1 with NBS in the presence of MeOCH2CH2OH predominantly afforded 2 in a stereoselective manner. Subsequent alkylation of the methoxyethoxy group produced the optically active