Organic-inorganic Porous Materials Research Articles

Functionalized Mesoporous MCM-41 as a Hybrid Catalyst for the Efficient Synthesis of Chromene and Mono/Bis Phthalazine-Trione Derivatives

Hybrid structures containing organic-inorganic porous materials are of substantial interest as green, heterogeneous and recyclable catalysts. In this study, an organic-inorganic hybrid material is prepared by surface functionalization of mesoporous MCM-41 with organic tags. The structure of hybrid material was characterized using the Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA). Subsequently, the catalytic activity of this novel hybrid material was investigated in the efficient one-pot, multicomponent reactions (MCRs) for synthesis of 2-amino-4H-chromenes and mono/bis phthalazine-triones under environmentally benign conditions. The most important advantages of this work are mild and green conditions, short reaction time, high efficiency and excellent yields of desired products. Moreover, the hybrid catalyst could be recycled up to four reaction runs with slight loss of the catalytic activity.

Zeolite-based hybrid material as an efficient promoter in the green synthesis of mono/bis-phthalazinones

Hybrid structures containing organic-inorganic porous materials are of great interest as green, heterogeneous, and recyclable catalysts. In this study, a novel organic-inorganic hybrid material (Zeolite HY@DETA) via the surface-functionalization of the Zeolite HY was prepared. The structure of hybrid material was characterized using the Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), Energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA), and Brunauer–Emmett–Teller (BET) surface area analysis. Subsequently, the catalytic activity of this novel hybrid material was considered in the one-pot three-component synthesis of 3-amino-1-aryl-5,10-dioxo-1H-pyrazolo[1,2-b]phthalazine-2-carbonitrile and some bis phthalazine-dione derivatives under green and environmentally benign conditions. The products were synthesized in excellent yields within a short reaction time and identified using elemental analysis, FT-IR, 1H NMR, and 13C NMR spectroscopies. This protocol avoids the use of harmful catalysts, toxic solvents, and harsh reaction conditions. Besides, the catalyst could be recycled for five reaction runs with a slight loss of catalytic activity.