Aldol Reaction of Trimethylsilyl Enolate with Aldehyde Catalyzed by Pyridine<i>N</i>-Oxide as a Lewis Base Catalyst
作者:Hisahiro Hagiwara、Hideyuki Inoguchi、Masakazu Fukushima、Takashi Hoshi、Toshio Suzuki
DOI:10.1055/s-2005-872664
日期:——
Aldol reaction of trimethylsilyl enolate with aldehydes proceeded in the presence of a catalytic amount of a Lewis base, pyridine N-oxide, and lithium chloride in DMF at room temperature. Not only aryl aldehydes but also alkyl aldehydes provided the aldol products in satisfactory yields. The reaction was mild enough to apply to aldehydes having HO, AcO, THPO, TBDMSO, MeS, pyridyl, or olefinic groups
三甲基甲硅烷基烯醇酯与醛的羟醛反应在催化量的路易斯碱、吡啶N-氧化物和氯化锂的存在下在DMF中在室温下进行。不仅芳基醛而且烷基醛都以令人满意的产率提供醛醇产物。该反应足够温和以适用于具有 H2O、AcO、THPO、TBDMSO、MeS、吡啶基或烯烃基团的醛。