Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne, Switzerland.
Chemistry. 2012 Nov 12;18(46):14867-74. doi: 10.1002/chem.201202313. Epub 2012 Sep 27.
Multicomponent reactions between 1,4-benzenediboronic acid, catechol, and different pyridyl ligands are reported. The condensation of 1,4-benzenediboronic acid with catechol gives 1,4-bis(benzodioxaborole)benzene. Upon crystallization, the ester aggregates with the N-donor ligands through dative B-N bonds. Depending on the nature of the pyridyl ligand, molecularly defined macrocycles or polymeric structures are obtained. 1D polymers are formed with 4,4-bipyridine and 1,2-di(4-pyridyl)ethylene, whereas a 2D network is obtained with the tetradentate ligand tetra(4-pyridylphenyl)ethylene. These results highlight the utility of dative B-N bonds in structural supramolecular chemistry and crystal engineering.
报道了 1,4-苯二硼酸、儿茶酚和不同吡啶配体之间的多组分反应。1,4-苯二硼酸与儿茶酚的缩合得到 1,4-双（苯并二恶硼烷）苯。结晶时，酯通过配位的 B-N 键与 N-供体配体聚集。根据吡啶配体的性质，得到了分子定义的大环或聚合结构。4,4-联吡啶和 1,2-二(4-吡啶基)乙烯形成 1D 聚合物，而四(4-吡啶基苯基)乙烯的四齿配体则得到 2D 网络。这些结果突出了配位 B-N 键在结构超分子化学和晶体工程中的应用。
