A new synthetic method providing both enantiomers by heteroconjugate addition strategy is described for stereocontrolled synthesis of optically active compounds from sugar chirons. Preparation includes introduction of phenylthioacetylene, acidic epimerization via dicobalthexacarbonyl complex, hydrosilylation and oxidation. Addition of carbon nucleophiles to the heteroolefins extended at the C-1 position
描述了一种通过杂共轭加成策略提供两种对映异构体的新合成方法,用于从糖chi立体控制合成光学活性化合物。制备包括引入苯
硫基
乙炔,通过二
钴六羰基配合物进行酸性差向异构化,氢化
硅烷化和氧化。将碳亲核试剂加至在C-1位延伸的杂烯烃中,得到具有高立体选择性的产物。加成模式可通过α-或β-螯合控制进行切换。