Using of modified sugarcane bagasse as a green and inexpensive catalyst for the synthesis of indeno[1,2-b]quinolin-8-one derivatives

Chemical grafting of 3-aminipropyl triethoxysilane to carbonized bagasse and acidification of amino groups leads us to introduce a new, efficient and green solid acid catalyst. We used the Fourier-transform infrared spectroscopy (FT-IR), X-Ray Diffraction (XRD), Thermogravimetric analysis (TGA), Field Emission Scanning Electron Microscope (FE-SEM), elemental-mapping and Energy Dispersive X-ray spectroscopy (EDX) for the characterization of the catalyst. This novel catalyst efficiently used to the synthesis of benzo[h]indenoquinolin derivatives and the products were obtained with 80–95% of yields at 3-5 h with high purity. All of the products were characterized by FT-IR, 1H and 13CNMR spectroscopies and compared with authentic samples. Our protocol offers several significant advantages, such as easy preparation of catalyst, green nature of catalyst and reaction media, high yields, good reaction times and easy workup.