Stereoselective Solid‐State Synthesis of Substituted Cyclobutanes Assisted by Pseudorotaxane‐like MOFs

Abstract

Regioselective photodimerization of trans-4-styrylpyridine (4-spy) derivatives is performed using pseudorotaxane-like Zn-based metal organic frameworks MOFs as templates.T he formation of rctt-HT (head-to-tail) dimers is achieved by confining pairs of coordinated 4-spyd erivative ligands within hexagonal windows and then irradiating them with UV light. It is also possible to achieve aphotodimerization reaction where two different substituted 4-spyl igands are included in such aMOF material. The ether bond formation is employed to protect the sensitive -OH group of HO-spya nd the methyl group of CH 3 O-spyi ss ubsequently removed after the formation of cyclobutane derivative in the CH 3 O-spy-based MOF.I ntroducing substituents at the 2-or 3-position of the phenyl group of 4-spyd oes not significantly affect the rate of the dimerization process except in the case of the strongly electron-withdrawing nitro group where the rate is significantly decreased. These results are in striking contrast to the mixtures of photoproducts and lowy ields obtained by untemplated photodimerization in organic solvents.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under https://doi.

Sustainable Coordination Polymer-Based Catalyst and Its Application in the Nitroaromatic Hydrogenation under Mild Conditions

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“…Stabilization of the catalysts on solid supports is one of the simplest methods to modify the efficiency and recycling of catalysts. , The most commonly used solids are zeolites, carbon materials, mesoporous SiO 2 , magnetic materials, and so on. − Coordination polymers (CPs) are solid-state constructions involving reiterated coordination units extending in one, two, or three dimensions . These organic–inorganic solids with infinite and uniform building blocks are constructed from polydentate organic ligands as linkers and metallic ions or metal-containing clusters as nodes. − Nowadays, CPs have received much attention due to their unique structural properties such as various metal sites, highly ordered porosity, high surface area, functional organic linkers, and good biocompatibility. − Due to these outstanding physicochemical properties, CPs can be utilized for a wide variety of applications in catalysis, photocatalysis, sensors, gas storage, biomedicine, water remediation, separation, and electrocatalysis. , …”

Tunable Interlayer Distance via Adsorption of Cyclic Hydrocarbons in SCSC Mode

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Terpyridine-metal complexes: effects of different substituents on their physico-chemical properties and density functional theory studies

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