Letters in Organic Chemistry - Volume 15, Issue 9, 2018

The synthesis of a novel class of trichloro-1-{(N-arylamino)ethylidene}malononitrile via a copper-catalyzed multicomponent reaction of malononitrile-trichloroacetonitrile adduct and aryl halides in good yields is described. The reported protocol has some advantages such as simple and mild procedure, easy work-up, no column chromatography, available starting materials-catalyst, pure products and good to high yields.

Diverse pathways and inflammatory responses are controlled by cAMP which is a vital intracellular second messenger. The cAMP is suppressed by the enzyme Phosphodiesterase4 (PDE4) specifically PDE4B2, which is the target proteins articulated in the inflammatory cells, for instance, T cells and monocytes in the pathogenesis of diseases such as asthma, rheumatoid arthritis, COPD and multiple sclerosis. PDE4 inhibition leads Read More

Nano-Fe3O4@ZrO2-SO3H (n-FZSA), was utilized as a magnetic catalyst for the synthesis of various fluoroquinolone compounds. These compounds were prepared by the direct amination of 7- halo-6-fluoroquinolone-3-carboxylic acids with piperazine derivatives and (4aR,7aR)-octahydro-1Hpyrrolo[ 3,4-b] pyridine in water. The results showed that n-FZSA exhibited high catalytic activity towards the synthesis of fluoroquinol Read More

A facile and convenient approach for the synthesis of dimeric calixarene, with a C6-bridge is described. C6-bridge spacer molecule increased the synthetic dimmer ability for further macromolecular studies. Our results (experimental and computational) show that the dimeric calixarene 6 has good affinity for Inositol hexaphosphate IP6.

A novel and green heterogeneous nanocomposite, polyethylene oxide sulfonic acid coated on magnetic nanoparticles surface (Fe3O4@PEO-SO3H), was successfully synthesized and completely characterized by Fourier-transforms infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), vibrating sample magnetometry (VSM), inductively-coupled plasma (ICP), Brunauer– Emmett-Teller (BET), scanning Read More

Background: Gliclazide is a second generation sulfonyl urea which acts as hypoglycemic agent (oral antidiabetic agent). It improves the function of blood coagulation, has hypoglycemic effect, and thus has been widely used in clinical treatment. Several syntheses of Gliclazide have been reported, but all of them have some drawbacks. Therefore, there has been an ever-increasing interest in finding a novel route for Glicla Read More

A series of protected and unprotected 3-O and 2, 3-di-O-alkyl derivatives of L-ascorbic acid were synthesized and their cytotoxic activity against metastatic breast epithelial carcinoma (MCF-7) cell line was evaluated. Cytotoxic activity evaluation indicated that compounds show moderate cytotoxic effects on tested cell line. Some of the 2, 3-di-O-alkyl derivatives of L-ascorbic acid exhibited potent inhibiting activity against M Read More

Three-component reaction between arylglyoxal monohydrates, isocyanides and 1,3- diketones in water is reported. This reaction provides a simple and efficient route for the synthesis of poly-functionalized furan derivatives. The reaction conditions and work-up procedure are simple and products were obtained in good yields.

Immobilization of polyethylene glycol substituted 1-methylimidazolium bromide on the surface of Fe3O4 magnetic nanoparticles led to the synthesis of powerful and recyclable heterogeneous phase-transfer catalysts which were successfully used for the one-pot three-component condensation of aryl aldehydes, malononitrile and 1,3-dicarbonyl compounds, to afford the corresponding 2-amino-3- cyano-4H-pyrans. The catalysts ca Read More

Background: Anthracnose, caused by the fungus Colletotrichum lindemuthianum, is one of the most important diseases that affect common beans. As some chalcones and triazoles are active cores against fungi, 1,2,3-triazolyl-chalcone hybrids could present more intense antifungal activities than the fungicides commercially available. Objective: The present work aimed at synthesizing these hybrids, evaluating them as antifun Read More

A model compound of graphene, with nine condensed aromatic rings has been optimized at DFT/B3LYP/6-311G+(d,p) level of theor, and the D index for aromaticity was calculated. The D index of eight possible epoxidation products was calculated showing that probably the reaction occurred only in the external crown of the molecule.

A very simple and efficient procedure for the preparation of primary amides is described from carboxylic acids using Mukaiyama reagent/KNCO in aqueous acetonitrile. Availability of the reagents, simplicity, and easy workup of the reaction crude make this method attractive for organic chemists.

In this study, the efficiency of some electrophilic halogen reagents including 2,4,6-trichloro- 1,3,5-triazine, 2,4,4,6-tetrabromo-2,5-cyclohexadienone, 2-chloro-1-methylpyridinium iodide, Nbromosuccinimide, trichloroisocyanuric acid, and 1,3-dibromo-5,5-dimethylhydantoin for the direct phosphine-free conversion of carboxylic acids into the corresponding acyl isothiocyanates was investigated. All of the reagent Read More

A wide variety of hydroxyaryl ketones bearing different motifs was successfully synthesized with good yields and excellent selectivities in the presence of HF@SiO2 as an environmental friendly acid under solvent-free condition. Mild and green reaction conditions and excellent yields (50-91%) make this method an attractive method for the efficient synthesis of hydroxyaryl ketones. Fries rearrangement of phenyl benzoate Read More