《One-pot synthesis of 2-amino-3-cyanopyridines and hexahydroquinolines using eggshell-based nano-magnetic solid acid catalyst via anomeric-based oxidation》 was written by Akbarpoor, Tahere; Khazaei, Ardeshir; Seyf, Jaber Yousefi; Sarmasti, Negin; Gilan, Maryam Mahmoudiani. Synthetic Route of C7H6O2 And the article was included in Research on Chemical Intermediates in 2020. The article conveys some information:
In the present research, the eggshell as a hazardous waste by European Union regulations was converted to a valuable catalyst, namely nano-Fe3O4@(HSO4)2. The as-prepared catalyst, first, was characterized using different techniques, including Fourier-transform IR spectroscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, field emission SEM, and transmission electron microscopy. Back-titration method confirmed the loading of a high surface d. of acidic group, namely 8.8 mmol HSO4 per g of the catalyst. The catalytic property of the as-prepared catalyst was examined in the synthesis of 2-amino-3-cyanopyridines via anomeric-based oxidation (ABO), and hexahydroquinolines derivatives High yield, short reaction time, solvent-free condition, waste to wealth, and optimization with the design of experiment are the major advantages of the present work. Taken together, these results suggest the conversion of waste to wealth products around the world and usage in organic transformation. After reading the article, we found that the author used 3-Hydroxybenzaldehyde(cas: 100-83-4Synthetic Route of C7H6O2)
3-Hydroxybenzaldehyde(cas: 100-83-4) can be used as a reactant along with ethyl acetoacetate and thiourea in the synthesis of corresponding dihydropyrimidine-2-thione (monastrol), using Yb(OTf)3 as a catalyst by Biginelli cyclocondensation reaction.Synthetic Route of C7H6O2
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