We have developed the synthesis of model nonracemic aromatic triynes (-)-(S)-1-4 containing the 1-[2-(but-3-yn-1-yl)-1-naphthyl]ethynyl}-2-[((S)-1-methylprop-2-yn-1-yl)oxy]- methyl}naphthalene unit. The common 1,2-di(2-substituted-1-naphthyl)acetylene part was constructed via Sonogashira coupling of appropriate 1-iodonaphthalenes with 1-ethynylnaphthalenes both bearing tethered acetylene units in positions 2. The chirality of triynes (-)-(S)-1-4 was introduced by incorporating commercially available (-)-(S)-but-3-yn-2-ol (10) into tethered acetylene units. The nonracemic triynes are intended to be used as substrates in stereoselective [2+2+2] triyne cycloisomerization catalyzed by transition metal complexes.
我们已经开发了模型非拉克米芳香三炔烃的合成,其中包含1-[2-(丁-3-炔-1-基)-1-萘基]乙炔基}-2-[((S)-1-甲基丙-2-炔基)氧基]-甲基}萘单元。常见的1,2-二(2-取代-1-萘基)乙炔部分是通过适当的1-碘萘与带有位置2上乙炔基的1-乙炔基萘的Sonogashira偶联构建的。三炔烃(-)-(S)-1-4的手性是通过将市售的(-)-(S)-丁-3-炔-2-醇(10)并入带有乙炔基的单元引入的。非拉克米三炔烃旨在用作过渡金属配合物催化的立体选择性[2+2+2]三炔环异构化反应的底物。