Abstract
Two mild Cu(II) diimine catalyzed click reactions have been reported to be efficient, robust, and additive-free one-pot procedures to isolate carbazole decorated 1,2,3-triazoles with high regioselectivity. The Cu(II) diimine complex [(L)Cu(OAc)2(OH2)], where L = N-(2-pyridinylmethylene)-2,6-dibenzhydryl-4-methoxylamine, was synthesized and characterized. In the first method, the click reactions were demonstrated between 9-(2-propynyl)-carbazole and aryl azide using catalyst 1 at room temperature in water. In the second approach, the fast and convenient procedures to prepare carbazole decorated 1,2,3-triazoles were reported through the mechanical grinding method, which enabled the isolation of carbazole decorated 1,2,3-triazoles within 6:32 min. Besides, both the catalytic protocols were demonstrated without the addition of either external reductant or base. The structural details of carbazole decorated 1,2,3-triazoles were elucidated using single-crystal X-ray diffraction and NMR techniques.
Graphical Abstract
Two mild Cu(II) diimine catalyzed click reactions have been reported to be efficient, robust, and additive-free one-pot procedures to isolate carbazole decorated 1,2,3-triazole derivatives with high regioselectivity.
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We gratefully acknowledge the DST-SERB (EMR/2017/001211) for financial support.
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Kalaivanan, S., Prabusankar, G. Highly Active Cu(II) Diimine Catalyzed Click Reactions: A Mild Yet Fast Approach to Carbazole Substituted 1,2,3-Triazoles. Catal Lett 153, 167–177 (2023). https://doi.org/10.1007/s10562-022-03971-y
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DOI: https://doi.org/10.1007/s10562-022-03971-y