作者:Tse-Lok Ho、Bin Tang、Guohua Ma、Pengfei Xu
DOI:10.1002/jccs.201100664
日期:2012.3
Synthesis of (±)‐diospongin A has been achieved from the (2SR,4RS)‐pentane‐1,2,4,5‐tetraol in six steps. An intermediate has also been converted into yashabushidiol A. This work features a desymmetric cyclization and reduction of a meso‐1,7‐diarylheptanoid precursor to furnish the desired cis‐2,6‐disubstituted tetrahydropyran.
由(2 SR,4 RS)-戊烷-1,2,4,5-四醇通过六个步骤完成了(±)-双皂甙A的合成。中间体也已转化为矢车菊二醇A。这项工作的特点是不对称环化并还原了内消旋-1,7-二芳基庚烷前体,可提供所需的顺式-2,6-二取代的四氢吡喃。