Suppression of epimerization due to selectivity leakage: an application towards the total synthesis of (−)-centrolobine
作者:Cheng-Hsia Angeline Lee、Teck-Peng Loh
DOI:10.1016/j.tetlet.2005.12.108
日期:2006.3
An InCl3-mediated Prins cyclization of homoallylic alcohols with aldehydes has been established. The enantioselectivities of the trisubstituted tetrahydropyrans are almost retained through the suppression of epimerization. The synthetic value of this protocol is demonstrated by the total synthesis of (−)-centrolobine.
已经建立了InCl 3介导的均醛醇与醛的Prins环化。三取代的四氢吡喃的对映选择性几乎通过抑制差向异构而得以保留。该协议的合成价值通过(-)-中心洛宾的全合成得到证明。