Synthesis of Dicarboxylate “C-Clamp” 1,2-Diethynylarene Compounds as Potential Transition-Metal Ion Hosts
作者:Erwin Reisner、Stephen J. Lippard
DOI:10.1002/ejoc.200700816
日期:2008.1
We report an efficient convergent synthesis of a new type of C-clamp ligand with a 1,2-diethynylarene scaffold involving a chelate host capable of binding a guest molecule in its endo-dicarboxylate pocket. The chemistry involves a combination of palladium-catalyzed Sonogashira, Heck, and Suzuki cross-coupling reactions. The compounds 2,3-bis[2-(2′-carboxybiphenyl-4-yl)ethynyl]triptycene and 4,5-bi
我们报告了一种新型 C 钳配体与 1,2-二乙炔基芳烃支架的高效收敛合成,该支架涉及螯合宿主,能够在其内二羧酸盐口袋中结合客体分子。该化学反应涉及钯催化的 Sonogashira、Heck 和 Suzuki 交叉偶联反应的组合。化合物2,3-双[2-(2'-羧基联苯-4-基)乙炔基]三苯并4,5-双[2-(2'-羧基联苯-4-基)乙炔基]藜芦醇及其2'-羧基-间-三联苯-4-基类似物被设计为双核配体,以组装具有风车几何形状的羧酸根桥接过渡金属配合物。一种含有共结晶水分子的 C 型钳化合物的 X 射线晶体结构揭示了水客体与 C 型钳主体的内取向羧酸实体之间的强氢键。此外,制备了两个syn-N-供体配体作为合成支架,以模拟羧酸桥双核蛋白中N-供体原子的几何排列。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)