2018
DOI: 10.7598/cst2018.1502
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Ultrasound Promoted Green Synthesis of Chalcones of 3-Acetylcoumarin

Abstract: A highly efficient and eco-friendly synthesis of chalcones of 3-acetylcoumarins has been developed involving the reaction of 3-acetylcoumarins with substituted aromatic aldehyde in the presence of potassium hydroxide under dual frequency ultrasonic irradiation. The synthesized compounds were characterized by their melting points, FTIR and 1 H MNR spectra.

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“…The best identified reaction conditions consisted in reacting 2,3-dihydrobenzofuran-5carbaldehyde with substituted acetophenones in ethanol, in the presence of sodium hydroxide, under ultrasound irradiation at room temperature (Figure 5A) (Adole et al, 2020). Sharma and co-workers developed an approach to get coumarin hybrids with other molecules such as maleimide, αlipoic acid and resveratrol, thus combining two biologically active structures and also synthesisized a set of chalcones presenting Frontiers in Chemistry frontiersin.org coumarin heterocycle as the ring B (Sharma et al, 2018). Arafa et al had the goal of finely-tune a new green protocol to synthesize bis-chalcones through a Claisen-Schmidt condensation.…”
Section: Ultrasound Chemistrymentioning
confidence: 99%
“…The best identified reaction conditions consisted in reacting 2,3-dihydrobenzofuran-5carbaldehyde with substituted acetophenones in ethanol, in the presence of sodium hydroxide, under ultrasound irradiation at room temperature (Figure 5A) (Adole et al, 2020). Sharma and co-workers developed an approach to get coumarin hybrids with other molecules such as maleimide, αlipoic acid and resveratrol, thus combining two biologically active structures and also synthesisized a set of chalcones presenting Frontiers in Chemistry frontiersin.org coumarin heterocycle as the ring B (Sharma et al, 2018). Arafa et al had the goal of finely-tune a new green protocol to synthesize bis-chalcones through a Claisen-Schmidt condensation.…”
Section: Ultrasound Chemistrymentioning
confidence: 99%