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Fe3O4@SiO2@TiO2 efficiently catalysed the preparation of tetrahydrobenzo[b]pyrans by a one-pot three component reaction of aldehydes, dimedone and malononitrile at 100 °C under solvent-free conditions.

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A novel nanomagnetic catalyst with Cl[DABCO-NOR 2 R]C(NOR 2 R)R 3 R tags was designed, synthesized and fully characterized by several identical techniques such as Fourier transform spectroscopy infrared (FT-IR), Energy-dispersive X-ray spectroscopy (EDX), elemental mapping analysis, thermal gravimetry analysis (TG), derivative thermal gravimetric (DTG), powder X-ray diffraction patterns (XRD), Field scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), physical adsorption and physisorption of NR 2 R isotherms (BET) and vibrating sample magnetometer (VSM). The mentioned nano-magnetic This is a previous version particles were used as an efficient and recyclable catalyst for the one-pot three component condensation reaction of 5-amino-3-methyl-1-phenylpyrazole, aryl aldehydes and malononitrile for the synthesis of pyrazolo[3,4-b]-pyridine derivatives under neat condition. -0,002 -0,0015 -0,001 -0,0005 0 86 88 90 92 94 96 98 100 55 155 255 355 455 555 655 755 Weight % Temperature (ºC)Weight % DTG [mgs^-1] Weight % DSC [mW] Comentario [U2 :[ ‫ﻋﺯﻳﺯ‬ ‫ﺧﺷﻧﻭﺩ‬ ‫ﺩﮐﺗﺭ‬ ‫ﻓﺭﻣﺎﺋﻳﺩ.‬ ‫ﺍﺩﻳﺕ‬ ‫ﻟﻁﻔﺎ‬ ‫ﺭﺍ‬ ‫ﺑﺧﺵ‬ ‫ﺍﻳﻥ‬ ‫ﻟﻁﻔﺎ‬ Comentario [U3 :[ ‫ﻋﺯﻳﺯ‬ ‫ﺧﺷﻧﻭﺩ‬ ‫ﺩﮐﺗﺭ‬ ‫ﻣﺗﻭﺟﻪ‬ ‫ﺭﺍ‬ ‫ﺭﻓﺭﻧﺱ‬ ‫ﺍﻳﻥ‬ ‫ﺷﺩﻥ‬ ‫ﻫﺎﻳﻼﻳﺕ‬ ‫ﻋﻠﺕ‬ ‫ﭼﻳﺳﺕ.‬ ‫ﺑﺧﺎﻁﺭ‬ ‫ﻧﺷﺩﻡ‬