New discoveries in chemical research and development in 2021. Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals. In an article, author is Wei, Pi-Feng, once mentioned the application of 120-21-8, Name: 4-Diethylaminobenzaldehyde, Name is 4-Diethylaminobenzaldehyde, molecular formula is C11H15NO, molecular weight is 177.2429, MDL number is MFCD00003382, category is benzoxazole. Now introduce a scientific discovery about this category.
The structural uniqueness of covalent organic frameworks (COFs) has brought these new materials great potential for advanced applications. One of the key aspects yet to be developed is how to improve the robustness of covalently linked reticular frameworks. In order to make the best use of pi-conjugated structures, we develop herein a killing two birds with one stone strategy and construct a series of ultrastable benzoxazole-based COFs (denoted as LZU-190, LZU-191, and LZU-192) as metal-free photocatalysts. Benefiting from the formation of benzoxazole rings through reversible/irreversible cascade reactions, the synthesized COFs exhibit permanent stability in the presence of strong acid (9 M HC1), strong base (9 M NaOH), and sunlight. Meanwhile, reticulation of the benzoxazole moiety into the Jr-conjugated COF frameworks decreases the optical band gap and therefore increases the capability for visible-light absorption. As a result, the excellent photoactivity and unprecedented recydability of LZU-190 (for at least 20 catalytic runs, each with a product yield of 99%) have been illustrated in the visible-light-driven oxidative hydroxylation of arylboronic acids to phenols. This contribution represents the first report on the photocatalytic application of benzoxazole-based structures, which not only sheds new light on the exploration of robust organophotocatalysts from small molecules to extended frameworks but also offers in-depth understanding of the structure activity relationship toward practical applications of COF materials.
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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem