Origins of stereoselectivity in radical additions: reactions of alkenes and radicals bearing oxazolidine and thiazolidine amide groups
作者:Ned A. Porter、Ian J. Rosenstein、Robert A. Breyer、John D. Bruhnke、Wen Xue Wu、Andrew T. McPhail
DOI:10.1021/ja00046a010
日期:1992.9
analysis of four alkenes that undergo stereoselective radical addition reactions are reported. The facial selectivity of radical additions to these alkenes is understood based upon their solid-state conformations. Alkenes which have a conformation placing a group at a position in space sterically protecting one the faces from addition undergo radical addition with diastereofacial selectivity. The structures
报道了四种经过立体选择性自由基加成反应的烯烃的单晶 X 射线分析。这些烯烃的自由基加成的面部选择性是根据它们的固态构象来理解的。具有将基团置于空间位置的构象的烯烃在空间上保护一个面免于加成,以非对映面选择性进行自由基加成。烯烃的结构通过基团相对于进行加成的烯烃中心的极坐标进行分析