ompg-C3N4/SO3H organocatalyst-mediated green synthesis of 1,2-dihydro-1-arylnaphtho[1,2-e][1,3] oxazin-3-ones under solvent-free and mild conditions: a fast and facile one-pot three-component approach

• Published in: Monatshefte für Chemie 2020-05, Vol.151 (5), p.791-798
• Main Authors: Goodarzi, Nahal, Rashidizadeh, Afsaneh, Ghafuri, Hossein
• Format: Article
• Language: English
• Subjects: Aldehydes; Analytical Chemistry; Carbon; Carbon nitride; Catalysts; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Graphite; Infrared analysis; Inorganic Chemistry; Morphology; Naphthol; Organic Chemistry; Original Paper; Physical Chemistry; Silicon dioxide; Solvents; Synthesis; Theoretical and Computational Chemistry
• ISSN: 0026-9247; 1434-4475
• DOI: 10.1007/s00706-020-02605-6

In this research, we have described the synthesis of the well-ordered mesoporous graphite carbon nitride (ompg-C 3 N 4 ) by applying SBA-15 as a potential hard silica template, and the catalytic performance of sulfonated well-ordered mesoporous graphite carbon nitride (ompg-C 3 N 4 /SO 3 H) as an environment‐friendly and efficient polymeric solid acid catalyst was investigated in the one‐pot preparation of 1,2-dihydro-1-arylnaphtho[1,2- e ][1,3]oxazin-3-ones. This cyclocondensation reaction was performed in the presence of various substituted aldehydes, urea, and 2-naphthol through mild and efficient solvent-free method. The structure and morphology of ompg-C 3 N 4 /SO 3 H were characterized using various instrumental analysis methods including FT-IR, EDS, FESEM, TEM, TGA, DTG, XRD, and BET. The simplicity of the process, low reaction times, simple workup, high to quantitative yields, avoiding the utilization of organic solvents, and reusability of the as-prepared catalyst are several prominent advantages of this present synthetic method. Graphic abstract