ketophosphonates was carried out by the chiral complex of NaBH4-L-proline, owing to the double asymmetric induction at the α-carbon atom. The hydroxyphosphonates obtained were isolated in a diastereomerically pure state and were transformed to the optically active, free hydroxyalkylphosphonic acids. The (R)-configuration of one of them was proved by X-ray crystal structure analysis. © 2008 Wiley Periodicals
用
硼氢化钠还原二薄荷基酮
膦酸酯涉及在 α-碳原子上的不对称诱导,导致形成的 α-羟基
膦酸酯的 (R)-对映体略过量。如果通过 NaBH4-
L-脯氨酸的手性络合物进行手性二薄荷基酮
膦酸酯的还原,由于在 α-碳原子上的双不对称诱导,可以获得更高的 ee 纯度。获得的羟基
膦酸酯以非对映异构纯状态分离,并转化为旋光的游离羟基烷基
膦酸。通过 X 射线晶体结构分析证明了其中之一的 (R)-构型。© 2008 Wiley Periodicals, Inc. 杂原子
化学 19:133–139, 2008; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.20391