Stereochemistry of the Singlet Oxygenation of Simple Alkenes: A Stereospecific Transformation
作者:Mariza N. Alberti、Georgios Vassilikogiannakis、Michael Orfanopoulos
DOI:10.1021/ol801488w
日期:2008.9.18
The stereochemistry of the allylic oxidation (ene reaction) mediated by singlet oxygen ((1)O2), using the optically active alkene (S,S)-cis-1,4-diphenyl-2-butene-1,4-d2 , in MeOH and aprotic solvents was investigated. Our findings indicate that the title reaction is a highly stereospecific suprafacial process, independent of solvent polarity. The observation of an isotope effect, which matches the
使用旋光性烯烃(S,S)-cis-1,4-diphenyl-2-butene-1,4-d2由单线态氧((1)O2)介导的烯丙基氧化(烯反应)的立体化学,研究了在甲醇和非质子溶剂中的溶解度。我们的发现表明标题反应是高度立体有规的表面过程,与溶剂极性无关。同位素效应的观察结果与立体比例完全匹配,排除了双自由基或开放偶极中间体。