A new synthetic method providing both enantiomers by heteroconjugate addition strategy is described for stereocontrolled synthesis of optically active compounds from D-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体的新合成方法,用于从D-糖chi醛中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。加法模式可通过α-或β-螯合控制进行切换。