A Highly Diastereoselective Route to Dinaphtho[<i>c</i>,<i>e</i>][1,2]oxaphosphinines and Their Application as Ligands in Homogeneous Catalysis
作者:Ivan A. Shuklov、Natalia V. Dubrovina、Haijun Jiao、Anke Spannenberg、Armin Börner
DOI:10.1002/ejoc.200901427
日期:2010.3
place. DFT calculations were performed to determine the dihedral angles of several dinaphtho[c,e][1,2]oxaphosphinines and to explain the observed loss of stereochemistry during the total synthesis from the starting enantiopure BINOL. The synthetic potential of 6-chloro-6H-dinaphtho[c,e][1,2]oxaphosphinine was corroborated in its reactions with phenols to afford the corresponding phosphonites. These
描述了一种以萘酚 (BINOL) 为原料合成 6H-二萘酚-[c,e][1,2] 氧代膦的新方法。中间体二萘并[2,1-b;1',2'-d]呋喃的开环具有极高的非对映选择性,并形成热力学最稳定的产物。通过 31 P NMR光谱和X射线结构分析阐明立体化学。立体异构 P 中心的差向异构化没有发生。进行 DFT 计算以确定几种二萘并 [c,e][1,2] 氧膦的二面角,并解释在起始对映体纯 BINOL 的全合成过程中观察到的立体化学损失。6-氯-6H-二萘并[c,e][1,2]氧代膦的合成潜力在其与苯酚的反应中得到证实,以提供相应的亚膦酸酯。