Multifunctional “Clickates” as Versatile Extended Heteroaromatic Building Blocks: Efficient Synthesis via Click Chemistry, Conformational Preferences, and Metal Coordination
作者:Robert M. Meudtner、Marc Ostermeier、Richard Goddard、Christian Limberg、Stefan Hecht
DOI:10.1002/chem.200701240
日期:——
Click chemistry has been utilized to access 2,6-bis(1-aryl-1,2,3-triazol-4-yl)pyridines (BTPs) as versatile extended heteroaromatic building blocks for their exploitation in supramolecular chemistry, in particular foldamer and ligand design. In addition to their high-yielding synthesis using Cu(I)-catalyzed Huisgen-type 1,3-dipolar cycloaddition reactions the formed triazole moieties constitute an
点击化学已被用作2,6-双(1-芳基-1,2,3-三唑-4-基)吡啶(BTP)的通用扩展杂芳族结构单元,可用于超分子化学,特别是折叠剂和配体设计。除了使用Cu(I)催化的Huisgen型1,3-偶极环加成反应进行高产率合成外,形成的三唑部分还构成了BTP框架的组成部分,并编码了其明显的构象偏好及其螯合能力。在末端芳基和中央吡啶部分上均带有供电子和吸电子取代基的各种对称和非对称BTP已被有效地合成,并且可以容易地用两亲性侧链和卟啉发色团后官能化。在溶液和固态下,BTP支架均采用高度保守的类似马蹄铁的抗-抗构象。在质子化或金属配位时,BTP支架切换为螯合的syn-syn构象。已经制备了铁和euro配合物,通过单晶X射线衍射分析成功表征了铁和euro的配合物,并研究了它们的自旋态和发光性质。扩展的杂芳族BTP支架应被证明对响应性折叠基骨架的设计以及新的磁性和发光材料的制备有用。通过单晶X射线衍射