A highly efficient asymmetric synthesis of optically active α,β-epoxyaldehydes from α,β-unsaturated acids
作者:Shiro Terashima、Masaji Hayashi、Kenji Koga
DOI:10.1016/s0040-4039(00)78592-3
日期:1980.1
The bromolactones(3) prepared from α,β-unsaturated acids(1) were converted to optically active α,β-epoxyaldehydes(2(R),3(S)-6)(84–98% ee) by successive epoxide formation and reductive cleavage of the proline moiety. The overall process constitutes a highly efficient asymmetric synthesis of 2(R),3(S)-6 from 1.
由α,β-不饱和酸(1)制备的溴内酯(3)通过连续形成环氧化物而转化为旋光性α,β-环氧醛(2(R),3(S)-6)(84–98%ee)和脯氨酸部分的还原性切割。整个过程构成了1中2(R),3(S)-6的高效不对称合成。