Total Synthesis of Virgatolide B via Exploitation of Intramolecular Hydrogen Bonding
作者:Paul A. Hume、Daniel. P. Furkert、Margaret A. Brimble
DOI:10.1021/jo5008527
日期:2014.6.6
A full account of the enantioselective total synthesis of virgatolide B is reported. Key features of the synthesis include an sp3–sp2 Suzuki–Miyaura cross-coupling of a β-trifluoroboratoamide with an aryl bromide, regioselective intramolecular carboalkoxylation, and a 1,3-anti-selective Mukaiyama aldol reaction. Intramolecular hydrogen bonding governed the regioselectivity of the key spiroketalization
报道了维格列酯B的对映选择性总合成的完整说明。合成的关键特征包括β-三氟硼酰胺与芳基溴的sp 3 –sp 2 Suzuki-Miyaura交叉偶联,区域选择性分子内碳烷氧基化反应和1,3-抗选择性Mukaiyama羟醛反应。分子内的氢键决定了关键的螺酮缩合步骤的区域选择性,从而提供了作为单一区域异构体的天然产物。