Synthesis and characterization of poly(4-vinylpyridine)/MCM-48 catalyst for one-pot synthesis of substituted 4H-chromenes

In this paper, we wish to report the synthesis and characterization of poly(4-vinylpyridine) supported on MCM-48 by in situ polymerization of 4-vinylpyridine in the presence of MCM-48. This catalyst was effectively employed as a novel heterogeneous basic catalyst for the one-pot synthesis of 4H-chromenes in aqueous medium. This catalyst was easily prepared, and showed considerable level of reusability.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► A novel polymer-inorganic hybrid material (poly(4-vinylpyridine)/MCM-48) is prepared by a very simple and inexpensive method. ► Poly(4-vinylpyridine)/MCM-48 is used as a novel heterogeneous basic catalyst for one-pot synthesis of 4H-chromenes in an aqueous medium. ► Existence of both organic and inorganic phases in this composite has critical effects on the catalyst activity. ► The composite catalyst possesses excellent stability and recyclability in the reaction.