Optically active diethyl N-(p-toluenesulfonyl)-aziridine 2-phosphonates as chiral synthons for the synthesis of β-substituted α-amino phosphonates
作者:E. Kurt Dolence、Jason B. Roylance
DOI:10.1016/j.tetasy.2004.08.034
日期:2004.10
versatile approach for the synthesis of both protected enantiomers of aziridine 2-phosphonates for use as chiral synthons has been developed. The aziridines arise from either (R)- or (S)-phosphonoserine diethyl esters followed by N-tosylation, O-mesylation and cyclization with sodium hydride. These highly enantio-enriched aziridine 2-phosphonates have been shown to react with carbon, nitrogen, sulfur
已经开发了一种通用的方法,用于合成用作手性合成子的两种保护的氮丙啶氮丙啶的两种对映体。氮丙啶衍生自(R)-或(S)-膦丝氨酸二乙酯,接着是N-甲苯磺酸化,O-甲磺酰化和用氢化钠环化。这些高度对映体富集的氮丙啶2-膦酸酯可与碳,氮,硫,氢化物,氟化物和磷亲核试剂反应,从而可在(R)中快速生成各种β-取代的α-氨基膦酸酯。-或(S)-配置。如果是巯基亲核试剂,则使用化学计量的Tri- n-丁基膦对于清洁生产相应的硫化物产品是必需的。利用手性HPLC方法监测合成过程,以评估可能得到的产物的对映体过量。