Sulfuric acid-modified poly(vinylpyrrolidone) ((PVP–SO<sub>3</sub>H)HSO<sub>4</sub>): a new highly efficient, bio-degradable and reusable polymeric catalyst for the synthesis of acridinedione derivatives
A facile and efficient protocol for the synthesis of xanthenedione and acridinrdione derivatives has been developed via the one-pot condensation reaction between dimedone and aldehydes (for the synthesis of xanthenediones) and dimedone, aldehydes and primary amines (for the synthesis of acridinediones) in presence of the formic acid as solvent at room temperature. All the products were obtained in good to excellent yields and all reactions were completed in short times.
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Silica‐bonded S‐sulfonic acid (SBSSA) has been found to be an efficient catalyst for the synthesis of 1,8‐dioxo‐decahydroacridines and 1,8‐dioxo‐octahydroxanthenes in excellent yields. The former have been synthesized from aromatic aldehydes, amines, and 5,5‐dimethyl‐1,3‐cyclohexanedione, whereas the latter from this mixture without amines. The method is an easy access to functionalized acridine and xanthene derivatives. The catalyst can be reused. J. Heterocyclic Chem., (2010).
Sulfonated Polyethylene Glycol (PEG-SO<sub>3</sub>H) as Eco-Friendly and Potent Water Soluble Solid Acid for Facile and Green Synthesis of 1,8-Dioxo-Octahydroxanthene and 1,8-Dioxo-Decahydroacridine Derivatives
In this work, a green, simple, and highly efficient procedure for the preparation of 1,8-dioxo-octahydroxanthene and 1,8-dioxo-decahydroacridine derivatives (as biologically active heterocycles, fluorescence materials and Pharmaceutical compounds) is described. Sulfonated polyethylene glycol (PEG-SO3H) has been used as an efficient and reusable catalyst for the one-pot multi component domino condensation reaction of dimedone and an aromatic aldehyde without/and a primary amine. The reactions were completed at 80 degrees C in water as green solvent. Using this procedure, all the products were obtained in good to excellent yields. The catalyst has been recovered and reused several times without any lose of reactivity.
One-pot cascade synthesis and in vitro evaluation of anti-inflammatory and antidiabetic activities of S-methylphenyl substituted acridine-1,8-diones
investigated. The anti-inflammatory results infer that the compounds 4c and 4d are showing excellent activity with an inhibition percentage of 80.58 ± 0.42, 81.72 ± 1.72 by membrane stabilization and 77.72 ± 0.76, 78.76 ± 0.81 by albumin denaturation methods, which is comparable with the standard diclofenac at a concentration of 100 μg/ml. Further, the antidiabetic assay revealed the moderate activity for the