Synthesis of xanthene and coumarin derivatives in water by using β-Cyclodextrin

Synthesis and in vitro antimicrobial activity evaluation of coumarin-3-carboxylic acids obtained via cascade reaction using chitosan as a recyclable catalyst

“…In this case, their reaction showed low yields, likely due to the low solubility of these substrates in water. This behavior was also observed by Kamat and collaborators (2020), 30 who synthesized coumarin-3carboxylic acids under conditions close to those used in this work, however, using b-cyclodextrin as a homogeneous catalyst.…”

“…This methodology provided results superior to those achieved by various methods related in the literature as sustainable and eco-friendly using homogeneous catalysts and water as solvent. 13,17,29,30 However, when using monosubstituted salicylaldehyde derivatives containing bulky groups (entry 8, Table 4) or disubstituted (entry 9, Table 4), the reactions proceeded slowly. In this case, their reaction showed low yields, likely due to the low solubility of these substrates in water.…”

Synthesis of some derivatives of 1,8-dioxo-octa-hydro xanthene and 9-aryl-hexahydro acridine-1,8-dione using metal ion-exchanged NaY zeolite as heterogeneous catalyst

“… 36 In 2020, Kamat et al prepared various derivatives of xanthene and coumarin with the help of beta-cyclodextrin as a reusable catalyst at 70 °C in water. 37 Dikusar et al In 2020 a suitable method for tetrahydrobenzo[ a ]acridine-11(7 H )-one and dihydrobenzo[ f ]pyrimido[4,5- b ]quinoline-9,11(7 H ,8 H )-dione containing residues of nicotinic and isonicotinic acids covalently attached via ester groups in different positions of the aromatic core. Quaternary ammonium salts of the synthesized acridine derivatives as well as a metal complex with palladium PdLCl 2 were obtained.…”