β-Keto Esters Derived from 2-(Trimethylsilyl)ethanol: An Orthogonal Protective Group for β-Keto Esters
作者:Reinhard Brückner、Eva Knobloch
DOI:10.1055/s-2008-1067157
日期:2008.7
esters derived from 2-(trimethylsilyl)ethanol undergo cleavage and decarboxylation when treated with 0.75 equivalents of tetrabutylammonium fluoride trihydrate in tetrahydrofuran at 50 °C, while P-keto esters derived from methanol, tert-butyl alcohol, allyl alcohol, or benzyl alcohol stay intact. Conversely, methyl-, tert-butyl-, allyl-, or benzyl P-keto esters can be cleaved and decarboxylated without
衍生自 2-(三甲基甲硅烷基)乙醇的 β-酮酯在 50 °C 下在四氢呋喃中用 0.75 当量的四丁基氟化铵三水合物处理时会发生裂解和脱羧,而衍生自甲醇、叔丁醇、烯丙醇或苯甲醇保持原样。相反,甲基-、叔-丁基-、烯丙基-或苄基P-酮酯可以被裂解和脱羧,而2-(三甲基甲硅烷基)乙基P-酮酯不受影响。类似地,由 2-(三甲基甲硅烷基) 乙醇和甲醇、叔丁醇、烯丙醇或苯甲醇衍生的混合双 (β-酮酯) 可以在相同的反应条件下进行化学选择性去功能化。