Development of P-stereogenic 2-phenyl-1,3,2-oxazaphosphorine ligands and their unexpected sensitivity to oxidation
作者:Wendy L. Benoit、Masood Parvez、Brian A. Keay
DOI:10.1016/j.tetasy.2008.12.027
日期:2009.1
P-Stereogenic oxazaphosphorine compounds of the form 4 have not previously been reported as asymmetricligands for metal-catalyzed reactions. In an effort to explore the behavior of such oxazaphosphorine ligands, monomeric oxazaphosphorine borane 9 and dimeric oxazaphosphorine boranes 25 and 26 were synthesized as catalyst precursors. The absolute configuration of the phosphorus center contained in