n-propylsulfamic acid supported onto magnetic fe3o4 nanoparticles (mnps-psa) was investigated as an efficient and magnetically recoverable catalyst for the one-pot synthesis of substituted coumarins from the reaction of coumarin with variety aromatic aldehydes in high to excellent yield at room temperature under solvent-free conditions. the magnetic nanocatalyst can be readily recovered easily ...

A novel flavonoid, (-)-2R,3R-3,5,4’-trihydoxyflavan-[6,7:5”,6”]-2”-pyranone, named uncariechin (1), was isolated from the methanolic extract of the leaves of Uncaria longiflora var. pteropoda (Miq.) Ridsd. along with the known (-)-epiafzelechin (2) and (-)-epicatechin (3), methyl 4-hydroxybenzoate and 4-hydroxybenzaldehyde, four pentacyclic oxindole alkaloids, isopteropodine, pteropodine, uncar...

The present article describes the evaluation of the in vitro activity against M. tuberculosis H37Rv of eight coumarin-derived aminoalcohols and amidoamines. Seven of the compounds display activity between 10 and 20 times higher than the classicall anti-TB drug ethambutol. The combination of coumarin scaffold with aminoalcohol fragments gave the most promising activities with MICs up to 0.32 μM.

Five new flavonoids, 5,8-dihydroxy-3,7-dimethoxy-3',4'-methylenedioxyflavone (1), 7-hydroxy-3,5-dimethoxy-3',4'-methylenedioxyflavone (2), 7-(2,3-dihydroxy-3-methylbutoxy)-3,5-dimethoxy-3',4'-methylenedioxyflavone (3), 7-(2,3-dihydroxy-3-methylbutoxy)-3,3',4',5-tetramethoxyflavone (4), and 7-(2,3-dihydroxy-3-methylbutoxy)-3,3',4',5,8-pentamethoxyflavone (5), were isolated from the leaves of Mel...

A new poly-substituted benzaldehyde, 1, and a known compound quercetin (2) were isolated from the leaves of Lysimachia fordiana Oliv. The structure of compound 1, named fordianol, was determined as 2-heptyl-3,6-dihydroxy-4- methoxybenzaldehyde on the basis of spectroscopic methods. Fordianol did not inhibit the growth of SWO-38 (human brain neuroglioma), MCF-7 (human breast cancer) or HeLa (hum...

A Series of 3-Substituted phenyl 2-(3,4-dihydroxyphenyl ethyl amino)-6-substituted quinazolin-4-(3H) ones (4a-4h) have been synthesized by the reaction of 3-Substituted phenyl -2-methylbromo-6-substituted quinazolin-4-(3H) ones (3a-3h) with dopamine (3,4 dihydroxy phenyl ethyl amine). The biological screening showed that compound 4f namely 3-(2-Chloro phenyl)2-(3, 4-dihydroxyphenyl ethyl amino)...

The nucleophilic ring opening of epoxy fatty esters was carried out using the amino-1,2,4-triazole to yield substituted derivatives of β-amino alcohol. The synthesis of the substituted beta amino alcohols has been achieved by refluxing equimolar quantities of long chain epoxy esters (epoxy fatty esters) and 4-amino-1,2,4-triazole in dichloromethane to yield following compounds, methyl 10-(4'-am...

Coumarins are a class of compounds with benzopyrone ring system. In the present work 7-hydroxy-4-methyl coumarin was prepared by the reaction of resorcinol and ethylacetoacetate mixture in the presence of concentrated sulphuric acid. 7-hydroxy-4-methyl coumarin was acetylated with acetic anhydride in the presence of acetic acid. The product formed was treated with bromine in glacial acetic acid...

A series of highly functionalized 1-(2',4'-dihydroxy-5'-substituted phenyl)-3-thienylpropane-1,3-diones 3a-g have been produced upon Baker-Venkataraman rearrangement of 4hydroxy-5-substituted-2-thienoyloxyacetophenones 2a-g using dimethylsulphoxide in NaOH. All the synthesized motifs 3a-g were confirmed by the spectroscopic analyses and evaluated for antibacterial efficacy against different pat...

The synthesis of three substituted 6,7-dihydroxy-4-quinazolineamines: tandutinib (1), erlotinib (2) and gefitinib (3) in improved yields is reported. The intermediates were characterized by NMR and the purities determined by HPLC.