D-Glucosamine was successfully employed as a chiral auxiliary for the enantioselective synthesis of phosphine oxides. The influence of the anomeric position was also investigated and revealed the excellent ability of the α-anomer to perform this transformation in a highly selective fashion. The methodology employed consisted of three steps: diastereoselective formation of the oxazaphospholidine followed
D-葡萄糖胺已成功地用作手性助剂,用于氧化膦的对映选择性合成。还研究了端基异构体位置的影响,并揭示了α-端基异构体以高度选择性的方式进行这种转化的出色能力。所采用的方法包括三个步骤:非对映体形成氧杂氮
磷吡啶,随后通过与两种
格氏试剂的反应选择性裂解
PN和PO键。制备了从P(V)转变为P(III)前体的P-表位
恶唑膦烷,从而允许合成对映体氧化膦。另外,手性助剂可以被回收并有效地再循环。