Chiral Silver Phosphate Catalyzed Transformation of<i>ortho</i>-Alkynylaryl Ketones into 1<i>H</i>-Isochromene Derivatives through an Intramolecular-Cyclization/Enantioselective-Reduction Sequence
作者:Masahiro Terada、Feng Li、Yasunori Toda
DOI:10.1002/anie.201307371
日期:2014.1.3
The transformation of ortho‐alkynylaryl ketones through a cyclization/enantioselective‐reduction sequence in the presence of a chiral silver phosphate catalyst afforded 1H‐isochromene derivatives in high yield with fairly good to high enantioselectivity. An asymmetric synthesis of the 9‐oxabicyclo[3.3.1]nona‐2,6‐diene framework, which has been found in some biologically active molecules, is presented
在手性磷酸银催化剂存在下,通过环化/对映体选择性还原序列对邻炔基芳基酮的转化,可提供高产率的1 H-异戊二烯衍生物,对映选择性相当好。在某些生物活性分子中发现的9-氧杂双环[3.3.1] nona-2,6-二烯骨架的不对称合成被证明是该方法的合成效用。