期刊
RESEARCH ON CHEMICAL INTERMEDIATES
卷 48, 期 9, 页码 3851-3865出版社
SPRINGER
DOI: 10.1007/s11164-022-04776-9
关键词
Covalent organic framework (COF); Nanoporous; Melamine; Terephthalaldehyde; Acidic catalyst; Phosphotungstic acid (H3PW12O40)
资金
- ViceChancellor for Research Affairs of Ahvaz Jundishapur University of Medical Sciences [N-0006]
A novel solid acid catalyst was developed for the efficient synthesis of the target product under solvent-free conditions. The catalyst offers multiple advantages, including high yield, the use of inexpensive chemicals, simple operation, easy separation, and recyclability.
In this study, phosphotungstic acid (H3PW12O40)-supported melamine-terephthalaldehyde Covalent Organic Framework (COF-PTA) has been prepared as a novel solid acid catalyst for the synthesis of 2H-indazolo[2,1-b]phthalazine trions under solvent-free conditions. The catalyst was characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM) and Brunauer-Emmett-Teller (BET) surface area analysis. The advantages of using this ecofriendly protocol include: excellent yield in a shorter time period, inexpensive chemicals without any use of solvents, simple experimental and work-up procedure. The catalyst was readily separated and was recycled for several runs with no significant loss of catalytic property.
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