Enantioselective Desymmetrization of Diphenylphosphinamides via (−)-Sparteine-Mediated <i>Ortho</i>-Lithiation. Synthesis of <i>P</i>-Chiral Ligands
作者:Cristinel Popovici、Pascual Oña-Burgos、Ignacio Fernández、Laura Roces、Santiago García-Granda、María José Iglesias、Fernando López Ortiz
DOI:10.1021/ol902545q
日期:2010.2.5
N-dialkyl-P,P-diphenylphosphinamides using [n-BuLi·(−)-sparteine] is described as an efficient method for the synthesis of P-chiral ortho-functionalized derivatives in high yields and ee’s from 45 to >99%. The method allows access to new enantiomerically pure P-chiralphosphine and diimine ligands.
描述使用[ n -BuLi·(-)-sparteine]对N-二烷基-P,P-二苯基次膦酰胺进行不对称邻位锂化是一种高效合成P-手性邻位官能化衍生物的有效方法,ee产自45到> 99%。该方法允许获得新的对映体纯的P-手性膦和二亚胺配体。