Access to <i>P</i>-stereogenic compounds <i>via</i> desymmetrizing enantioselective bromination
作者:Qiu-Hong Huang、Qian-Yi Zhou、Chen Yang、Li Chen、Jin-Pei Cheng、Xin Li
DOI:10.1039/d0sc07008d
日期:——
novel and efficient desymmetrizing asymmetric ortho-selective mono-bromination of bisphenol phosphine oxides under chiral squaramide catalysis was reported. Using this asymmetric ortho-bromination strategy, a wide range of chiral bisphenol phosphine oxides and bisphenol phosphinates were obtained with good to excellent yields (up to 92%) and enantioselectivities (up to 98.5 : 1.5 e.r.). The reaction
报道了一种在手性方酰胺催化下双酚氧化膦的新型高效去对称不对称邻位选择性单溴化反应。利用这种不对称邻位溴化策略,获得了多种手性双酚氧化膦和双酚次膦酸盐,具有良好至优异的产率(高达 92%)和对映选择性(高达 98.5 : 1.5 er)。该反应可以放大,并且通过转化和在不对称反应中的应用证明了所需P-立体化合物的合成效用。