Regio- and Stereospecific Cleavage of Stannyloxiranes with Lithium Diphenylphosphide
作者:Ana M. González-Nogal、Purificación Cuadrado、M. Angeles Sarmentero
DOI:10.1002/ejoc.200800984
日期:2009.2
group and, depending on the nature of the silyl group, led either to stereodefined β-silylated vinylphosphane oxides or to β-stannyl silyl enol ethers. Finally, the gem-silyl-stannyloxiranes underwent β-opening to give mixtures of β-phosphanyl acylsilanes and silyl enol ethers. All compounds are interesting synthons of great versatility in organic chemistry.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451
未取代或 C-取代的锡基环氧乙烷与二苯基磷化锂发生立体特异性反应,产生由 α-开环产生的 β-羟基磷烷氧化物或通过 β-开环产生 β-膦酰基酮。此外,二锡基环氧乙烷的反应性取决于它们的配置。顺式异构体提供相应的 α,β-二膦醇,而反式异构体则显示为无反应性。另一方面,β-甲硅烷基-甲锡基环氧乙烷的开环区域化学受锡基团控制,并且根据甲硅烷基的性质,导致立体定义的β-甲硅烷基化乙烯基膦氧化物或β-甲锡基甲硅烷基烯醇醚。最后,gem-甲硅烷基-锡基环氧乙烷经历β-开环,得到β-磷酰基酰基硅烷和甲硅烷基烯醇醚的混合物。