Enantioselective Synthesis of C11–C17 Segment of Mycinolide IV Using Samarium(II) Iodide-mediated Aldol Reaction
作者:Yasuyuki Ogawa、Kiichi Kuroda、Teruaki Mukaiyama
DOI:10.1246/cl.2005.698
日期:2005.5
γ-unsaturated esters were stereoselectively synthesized by aldol reaction of aldehydes with samarium enolates that were generated by epoxide-fragmentation of γ,δ-oxiranyl-α,β-unsaturated esters using two moles of samarium-(II) iodide. This samarium(II) iodide-mediated aldol reaction was applied successfully to the enantioselective synthesis of Cl 1-C17 segment of Mycinolide IV.
δ,β'-二羟基-β,γ-不饱和酯是通过醛与钐烯醇化物的羟醛反应立体选择性合成的,钐烯醇化物是通过使用两摩尔钐对γ,δ-环氧乙烷基-α,β-不饱和酯进行环氧化物裂解而产生的- (二)碘化物。这种碘化钐 (II) 介导的羟醛反应已成功应用于 Mycinolide IV 的 Cl 1-C17 片段的对映选择性合成。