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This research introduced a novel nano catalyst, LDH@PTRMS@DCMBA@CuI, developed from nano copper immobilized on a layered double hydroxide modified with a new type of sulfonamide: N 1 , N 3 -dicarbamimidoylbenzene-1,3-disulfonamide (DCMBA). This catalyst demonstrated significant activity and selectivity in synthesizing 5-amino-1 H -pyrazole-5-carbonitrile derivatives. The derivatives were produced via a three-component one-pot reaction combining benzaldehydes, malononitrile, and phenyl hydrazine in H 2 O/EtOH solvent at 55 °C. This innovative synthesis strategy offered several advantages, including eco-friendliness, simplicity, stability, mild reaction conditions, easy purification of products, short reaction times (15-27 min), and excellent yields (85-93%). Additionally, the green methodology was validated by the catalyst's reusability over four consecutive cycles without significant loss of catalytic activity., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)

This research developed a new nanocatalyst by incorporating nanocopper iodide onto the surface of a layered double hydroxides modified. This new nanocatalyst enables the green synthesis of tetrahydrobenzo[ b ]pyrans and 2-amino-4 H -chromene derivatives through a one-pot, three-component reaction, demonstrating remarkable activity and selectivity. Key advantages of this method include increased products yield (86-96%), rapid reaction kinetics (5-23 minutes), low reaction temperature (40 °C), synthesis of new products, straightforward purification methods, catalyst recyclability (up to 4 cycles), and solvent-free conditions., Competing Interests: The authors declare no competing interests., (This journal is © The Royal Society of Chemistry.)

A novel catalyst based on layered double hydroxides coated with copper nitrate [LDH@(3-chloropropyl)trimethoxysilane@N1,N4- bis (4,6-diamino-1,3,5-triazin-2-yl)benzene-1,4-disulfonamide@Cu] was successfully synthesized. The structure of the new synthesized catalyst was investigated and confirmed using different analytical techniques, such as Fourier-transform infrared spectroscopy (FTIR), energy-scattered X-ray spectroscopy (EDX) mapping, X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and heat gravity/heat derivatization (TGA/DSC). The skilled catalyst proved its efficiency for one-pot three-component synthesis of pyrano[2,3- d ]pyrimidine and new dihydropyrazolo[4',3':5,6]pyrano[2,3- d ]pyrimidine-dione derivatives. Using this efficient catalyst, products were synthesized with a high yield, in a short time, and under soft and solvent-free conditions. The catalyst can be recovered and reused four times without a significant loss of efficiency., Competing Interests: The authors declare no competing financial interest., (© 2024 The Authors. Published by American Chemical Society.)