Asymmetric synthesis with diphenylphosphine oxides: Bicyclic aminals and oxazolidines as chiral auxiliaries
作者:Peter O'Brien、Stuart Warren
DOI:10.1016/s0957-4166(96)00451-x
日期:1996.12
Syntheses of six novel phosphineoxidechiral auxiliaries are described. The auxiliaries are composed of the diphenylphosphinoyl (Ph2PO) group and either proline-derived bicyclic aminals or norephedrine-derivedoxazolidines. One auxiliary is used in the synthesis of an optically active β-hydroxyphosphineoxide.
Norephedrine-derived oxazolidines as chiral auxiliaries-stereocontrolled routes to R or S β-hydroxy phosphine oxides
作者:Peter O'Brien、Stuart Warren
DOI:10.1016/0040-4039(96)00467-4
日期:1996.4
Reduction of a β-keto phosphineoxideoxazolidine and reaction of an oxazolidine aldehyde with a lithiated phosphineoxide provide stereoselective routes to S or Rβ-hydroxyphosphineoxides.