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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Supramolecular bidentate phosphorus ligands based on bis-zinc(II) and bis-tin(IV) porphyrin building blocks
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Supramolecular bidentate phosphorus ligands based on bis-zinc(II) and bis-tin(IV) porphyrin building blocks

机译：基于双锌（II）和双锡（IV）卟啉结构单元的超分子双齿磷配体

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摘要

Selective metal-ligand interactions have been used to prepare supramolecular bidentate ligands by mixing monodentate ligands with a suitable template. For these assemblies pyridine phosphorus ligands and a zinc(II) porphyrin dimer were used. In the rhodium-catalysed hydroformylation of 1-octene and styrene improved selectivities have been obtained for some of the assembled bidentate ligand systems. In the palladium catalysed asymmetric allylic alkylation similar effects were observed; the enantioselectivity increased by using a bisporphyrin template. The preparation of supramolecular catalyst systems was also explored using tin-oxygen interactions. Dihydroxotin(IV) porphyrin and carboxylic phosphorus ligands assemble into supramolecular ligands and the phosphorus donor atom coordinates to transition metals. The stronger oxygen-tin bond, compared to pyridine-zinc does not result in a better performance of the catalyst.
机译：通过将单齿配体与合适的模板混合，选择性金属-配体相互作用已用于制备超分子双齿配体。对于这些组件，使用吡啶磷配体和锌（II）卟啉二聚体。在铑催化的1-辛烯和苯乙烯的加氢甲酰化反应中，对于某些组装的二齿配体体系，已经获得了提高的选择性。在钯催化的不对称烯丙基烷基化反应中，观察到了相似的效果。通过使用双卟啉模板，对映选择性增加。还使用锡-氧相互作用探索了超分子催化剂体系的制备。二氢氧杂卟啉（IV）卟啉和羧基磷配体组装成超分子配体，磷供体原子配位至过渡金属。与吡啶-锌相比，更强的氧-锡键不会导致催化剂的更好性能。

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