Phosphine-catalyzed synthesis of β-lactones from ketenes and chiral β-oxyaldehydes
作者:Shi Chen、Mukulesh Mondal、Matthew P. Adams、Kraig A. Wheeler、Nessan J. Kerrigan
DOI:10.1016/j.tetlet.2015.09.141
日期:2015.11
catalytic procedure for the diastereoselective synthesis of β-lactones bearing up to three stereogenic centers, from disubstituted ketenes and chiral β-oxyaldehydes. Tri-n-butylphosphine was determined to be the best catalyst with yields of up to 95% and moderate to good diastereoselectivity (dr up to 4:1) obtained in the formation of highly substituted β-lactones.
在这封信中,我们描述了一种由双取代的烯酮和手性的β-乙氧基醛组成的非对映选择性合成β-内酯的催化程序,该β-内酯最多可容纳三个立体中心。三Ñ丁基膦被确定为具有高达95%的产率的最佳催化剂和中度至良好的非对映选择性(DR高达4:1)在高度取代的β-内酯的形成而获得。