Stereoselective synthesis of 1,2,4-triols via intramolecular bis-silylation of CarbonCarbon triple bonds followed by hydrogenation
作者:Masahiro Murakami、Hideaki Oike、Mitsuru Sugawara、Michinori Suginome、Yoshihiko Ito
DOI:10.1016/s0040-4020(01)89908-7
日期:1993.5
new strategy for the stereoselective synthesis of 1,2,4-triols has been developed. An alkyne tethered to a disilanyl group, upon treatment with palladium acetate and tert-alkyl isocyanide, furnished an exocyclic bis-silylated olefin. Subsequent hydrogenation took place from the less-hindered side of the ring producing cis-disubstituted oxasilolane. Oxidation of the two CSi bonds of the hydrogenated
已经开发了1,2,4-三醇立体选择性合成的新策略。在用乙酸钯和叔烷基异氰化物处理后,被束缚至二硅烷基的炔烃提供了环外双甲硅烷基化的烯烃。随后从环的受阻较弱的一侧进行氢化,生成顺式-二取代的氧杂硅烷基。氢化恶唑烷烃的两个CSi键的氧化导致1,2,4-三醇的立体和区域确定的合成。