Synthesis of a new class of furo[3,2-c]coumarins and its anticancer activity

Targeting Tumor Associated Carbonic Anhydrases IX and XII: Highly Isozyme Selective Coumarin and Psoralen Inhibitors

A small library of psoralen carboxylic acids and their corresponding benzenesulfonamide derivatives were designed and synthesized to evaluate their activity and selectivity toward tumor associated human carbonic anhydrase (hCA) isoforms IX and XII. Both psoralen acids and sulfonamides exhibited potent inhibition of IX and XII isozymes in the nanomolar concentration range. However, psoralen acids resulted as the most selective in comparison with the corresponding benzenesulfonamide derivatives. Our data indicate that the psoralen scaffold is a promising starting point for the design of highly selective tumor associated hCA inhibitors.

Preparation and characterization of novel phthalhydrazide-functionalized MCM-41 and its application in the one-pot synthesis of coumarin-fused triazolopyrimidines

Preparation and characterization of novel phthalhydrazide-functionalized MCM-41 and its application in the one-pot synthesis of 4-hydroxycoumarin-fused triazolopyrimidines.

Synthesis, Crystal Structure and Antitumour Activity Evaluation of 1H-thieno[2,3-c]chromen-4(2H)-one Derivatives

A series of 1 H-thieno[2,3-c]chromen-4(2 H)-one derivatives were synthesised through Knoevenagel condensation of substituted flavanones with thiazolidine-2,4-dione in ethanol in the presence of piperidine. The mechanism of the reaction was proposed. All synthesised compounds were characterised by IR, 1H NMR, 13C NMR, HRMS, and elemental analysis. The structure of 2-(3-chlorophenyl)-1 H-thieno[2,3- c]chromen-4(2 H)-one was confirmed by a single crystal X-ray diffraction analysis. A preliminary antitumour screening showed that 2-(2-fluorophenyl)-1 H-thieno [2,3- c]chromen-4(2 H)-one had moderate to good activity against A549, BGC-823, HCT116 and MDA-MB-453 cancer cell lines, and 2-(3,4-dimethoxyphenyl)-1 H-thieno[2,3- c]chromen-4(2 H)-one displayed similar activity against these four kinds of cancer cells compared with the reference drug.

One-pot multicomponent synthesis of furo[3,2-c]coumarins promoted by amino-functionalized Fe3O4@SiO2 nanoparticles

Amino-functionalized Fe3O4@SiO2 nanoparticles (Fe3O4@SiO2–NH2 NPs) were prepared by treating Fe3O4@SiO2 NPs with (3-aminopropyl)-triethoxysilane. They have been characterized by powder X-ray diffraction, vibrating sample magnetometer, scanning electronic microscopy, energy dispersive X-ray, thermogravimetric analysis and FT-IR spectroscopy. A neat, atom-economical, environmentally benign one-pot multicomponent synthetic route for the synthesis of furo[3,2-c]coumarins in good yields has been devised using the Fe3O4@SiO2–NH2 NPs. The present methodology can be used for the design of libraries and diversity-oriented synthesis, and has potential for biological applications and drug discovery.