Beilstein J. Org. Chem.2020,16, 2888–2902, doi:10.3762/bjoc.16.238
; heterogeneous catalyst; immobilizedcoppercatalyst; lignosulfonate; nitrogen-containing heterocycles; solid acid; Introduction
Heterogeneous metal catalysts have been continuously receiving considerable attention in the field of organic synthesis owing to the advantages of easy separation and recycling [1][2
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Graphical Abstract
Figure 1:
Schematic illustration for the preparation of the catalyst in this work.