Catalytic Asymmetric Hydrogenation of α-Arylcyclohexanones and Total Synthesis of (−)-α-Lycorane
作者:Gang Li、Jian-Hua Xie、Jing Hou、Shou-Fei Zhu、Qi-Lin Zhou
DOI:10.1002/adsc.201300165
日期:2013.5.17
efficient catalytic asymmetric hydrogenation of racemic α‐arylcyclohexanones with an ethylene ketal group at the 5‐position of the cyclohexane ring via dynamic kinetic resolution has been developed, giving chiral α‐arylcyclohexanols with two contiguous stereocenters with up to 99% ee and >99:1 cis/trans‐selectivity. Using this highly efficient asymmetric hydrogenation reaction as a key step, (−)‐α‐lycorane
通过动态动力学拆分,开发了一种高效的催化消旋外消旋α-芳基环己酮在环己烷环5位带有乙烯缩酮的氢化反应,得到具有两个连续立体中心的手性α-芳基环己醇,ee高达99%,大于99 :1顺/反选择性。使用这一高效的不对称加氢反应作为关键步骤,从市售原料中分13步合成了(-)-α-乙二烷,总收率达19.6%。