作者:Phillip J. Mabe、Armen Zakarian
DOI:10.1021/ol403398u
日期:2014.1.17
A mild method for α-hydroxylation of N-acyl oxazolidinones by asymmetric radical addition of the 2,2,6,6-tetramethylpiperidine N-oxy (TEMPO) radical to titanium enolates was developed. The high diastereoselectivity and broad scope of the reaction show synthetic utility for the α-hydroxylation of substrates that are not tolerant to strongly basic conditions.
提出了一种温和的方法,该方法通过将2,2,6,6-四甲基哌啶N-氧基(TEMPO)基团不对称地自由基加成到烯醇钛上,来进行N-酰基恶唑烷酮的α-羟基化。高非对映选择性和广泛的反应范围显示了对不耐受强碱性条件的底物的α-羟基化反应的合成效用。