Highly stereoselective synthesis of antitumor agents: both enantiomers of goniothales diol, altholactone, and isoaltholactone
作者:Jhillu Singh Yadav、Atcha Krishnam Raju、Ponugoti Purushothama Rao、Gurram Rajaiah
DOI:10.1016/j.tetasy.2005.08.047
日期:2005.10
A flexible stereoselective route to synthesize both enantiomers of the highly functionalized substituted tetrahydrofurans and α,β-unsaturated-δ-lactones, goniothales diol, altholactone, and isoaltholactone, from readily available cinnamyl alcohol is described. This approach derived its asymmetry from Sharpless catalytic asymmetric epoxidation and Sharpless asymmetric dihydroxylation reactions. The
描述了从容易获得的肉桂醇合成高度官能化的取代的四氢呋喃的对映异构体和α,β-不饱和-δ-内酯,菊苣二醇,甲内酯和异甲内酯的对映体的灵活的立体选择性途径。这种方法的不对称性源于Sharpless催化不对称环氧化和Sharpless不对称二羟基化反应。所产生的二醇以高对映体过量产生,并在催化量的樟脑磺酸存在下以立体选择性方式环化。