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Synfacts 2021; 17(11): 1247
DOI: 10.1055/s-0040-1720715
Polymer-Supported Synthesis

Photochemical Meerwein Arylation By Using a Titanium(VI)-Based Covalent Organic Framework

Contributor(s):
Yasuhiro Uozumi
,
Aya Tazawa
Lu H.-S, Han W.-K, Yan X, Chen C.-J, Niu T, *, Gu Z.-G. * Jiangnan University, Wuxi, P. R. of China
A 3D Anionic Metal Covalent Organic Framework with soc Topology Built from an Octahedral TiIV Complex for Photocatalytic Reactions.

Angew. Chem. Int. Ed. 2021;
60: 17881-17886
DOI: 10.1002/anie.202102665.
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Key words

photocatalysis - titanium catalysis - covalent organic framework - Meerwein arylation

Significance

A titanium (VI)-based three-dimensional covalent organic framework (Ti-COF), prepared according to Equation 1, catalyzed the Meerwein arylation of alkenes in MeCN–H2O under white LED irradiation to afford the corresponding Meerwein addition products in ≤75% yield (eq. 2).


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Comment

The Ti-COF catalyst was characterized by means of FTIR, 13C CP/MAS NMR, UV/Vis DRS, XPS, PXRD, TGA, N2 adsorption/desorption isotherms, BET, SEM, TEM, HRTEM, STEM, EDX, and elemental analyses. In the Meerwein addition reaction of 4-nitrobenzenediazonium tetrafluoroborate and styrene, the catalyst was recovered and reused four times without significant loss of its catalytic activity.


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Publication History

Article published online:
19 October 2021

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