1,3-Stereocontrol with phosphine oxides: asymmetric synthesis of all four diastereoisomers of a γ′-benzyloxy β-hydroxy phosphine oxide
作者:Adam Nelson、Stuart Warren
DOI:10.1039/a903370j
日期:——
structure of lithiated phosphine oxides. We have developed complementary methods for the asymmetric synthesis of all four diastereomeric β-hydroxy phosphine oxides 4-benzyloxy-2-diphenylphosphinoyl-1-(2-furyl)octan-1-ol and our approach constitutes a formal synthesis of all eight possible stereoisomers. A series of similar β-hydroxy phosphine oxides were eliminated to give optically active homoallylic
本文介绍了具有γ'立体中心的旋光性氧化膦[例如,(R)-1-二苯基膦酰基庚基-3-基苄基醚]可被锂化并与醛和酯反应。反应表现出中等水平的1,3不对称诱导,并提出了模型来解释根据构型不稳定性和锂化膦氧化物的已知结构观察到的立体选择性。我们已经开发了互补的方法来不对称合成所有四种非对映体的β-羟基膦氧化物4-苄氧基-2-二苯基膦酰基-1-(2-呋喃基)辛-1-醇,我们的方法构成了所有八种可能的立体异构体的正式合成。消除了一系列相似的β-羟基膦氧化物,得到了光学活性的均烯丙基醇衍生物。