Synthesis of 3-Deoxy Glycals via Tandem Metathesis Sequences and Their Use in an Intermolecular Heck Arylation
作者:Bernd Schmidt、Anne Biernat
DOI:10.1002/ejoc.200800824
日期:2008.12
Deoxy glycals can be synthesized from a mannitol-derived C2-symmetric diene diol by using the tandem RCM/isomerization approach. Incorporation of a ruthenium-catalyzed dehydrogenative silylation step into the reaction sequence is possible. Thus, an orthogonally protected 3-deoxy glycalresults via a tandem RCM/hydrosilylation/isomerization sequence. All ruthenium-catalyzed steps of this tandem sequence
通过使用串联 RCM/异构化方法,可以从甘露醇衍生的 C2 对称二烯二醇合成脱氧糖醇。将钌催化的脱氢甲硅烷基化步骤并入反应序列是可能的。因此,通过串联 RCM/氢化硅烷化/异构化序列产生正交保护的 3-脱氧糖基。该串联序列的所有钌催化步骤均在不同条件下发生,从而允许中间体的选择性合成。通过该途径获得的 3-脱氧糖醛会发生区域选择性和立体选择性 Heck 反应,例如 C-芳基糖苷的合成。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)