Selective Formation of α-Cleavage Cycloadduct of Oxirane with Heterocumulene Promoted by High-Coordinated Trialkyltin Complexes
作者:Katsunori Yano、Nobuyoshi Amishiro、Akio Baba、Haruo Matsuda
DOI:10.1246/bcsj.64.2661
日期:1991.9
In the reaction of monosubstituted oxiranes and heterocumulenes, trialkyltin iodides coordinated by phosphine oxides effectively catalyzed the formation of heterocycles via cleavage at the substituted site in the oxirane ring, while other types of organotin complexes or noncomplexed organotin iodides promoted selective cleavage at the opposite site. A mechanistic investigation demonstrated that the
在单取代环氧乙烷和杂枯草烯的反应中,氧化膦配位的三烷基锡碘化物通过环氧乙烷环中取代位点的裂解有效催化杂环的形成,而其他类型的有机锡络合物或未络合的有机锡碘化物则促进了相反位点的选择性裂解。机理研究表明,氧化膦的配位促进了环氧乙烷环裂解的逆反应,导致主要形成 α-裂解环加合物。