Selective Cleavage and Decarboxylation
of β-Keto Esters Derived from(Trimethylsilyl)ethanol
in the Presence of β-Keto Esters Derived fromOther
Alcohols<b />
作者:Reinhard Brückner、Eva Knobloch
DOI:10.1055/s-2008-1078568
日期:——
β-Keto[2-(trimethylsilyl)ethyl esters] are dealkoxycarbonylated at 50 °C by 0.75 equivalents of Bu 4 N + F - ·3H 2 O in THF. This reaction proceeds chemoselectively in the presence of β-keto(methyl esters), β-keto(tert-butyl esters), β-keto(allyl esters), or β-keto(benzyl esters) as revealed in intermolecular competition experiments.
β-酮[2-(三甲基甲硅烷基)乙酯]在50°C下被0.75当量的Bu 4 N + F - ·3H 2 O在THF中脱烷氧基羰基化。如分子间竞争实验所示,该反应在 β-酮(甲酯)、β-酮(叔丁酯)、β-酮(烯丙基酯)或 β-酮(苄基酯)存在下化学选择性地进行。