- Synthesis and neuroprotective effects of novel chalcone-triazole hybrids
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The development of novel neuroprotective agents is urgently needed for the treatment of neurodegenerative diseases, affecting aging individuals worldwide. In this study, a new set of chalcone-triazole hybrids (6a-g) was synthesized and evaluated for their
- Sooknual, Pichjira,Pingaew, Ratchanok,Phopin, Kamonrat,Ruankham, Waralee,Prachayasittikul, Supaluk,Ruchirawat, Somsak,Prachayasittikul, Virapong
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- Synthesis of novel perillyl-dihydropyrimidinone hybrids designed for antiproliferative activity
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A series of fifteen novel dihydropyrimidinone hybrid compounds were synthesized in good yields via a multicomponent reaction combined with the Huisgen reaction. The antiproliferative activity was investigated against nine tumor cell lines, and four hybrid
- Vendrusculo, Vinicius,De Souza, Vanessa P.,M. Fontoura, Luiz Ant?nio,M. D'Oca, Marcelo G.,Banzato, Thais P.,Monteiro, Paula A.,Pilli, Ronaldo A.,De Carvalho, Jo?o Ernesto,Russowsky, Dennis
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- Anti-leishmanial click modifiable thiosemicarbazones: Design, synthesis, biological evaluation and in silico studies
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Leishmaniasis is a devastating tropical disease with limited therapeutic options. Depending on recently reported active anti-leishmanial compounds, we designed and synthesized a series of click modifiable 1,2,3-triazole and thiosemicarbazone hybrids. Most
- Temraz, Mohamed G.,Elzahhar, Perihan A.,El-Din A. Bekhit, Alaa,Bekhit, Adnan A.,Labib, Hala F.,Belal, Ahmed S.F.
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- Kojic acid–natural product conjugates as mushroom tyrosinase inhibitors
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As part of our effort to develop potential tyrosinase inhibitors, we have conjugated the well-known tyrosinase inhibitor kojic acid (KA) with several phenolic natural products such as umbelliferone, sesamol, thymol, carvacrol, eugenol, isoeugenol, vanilli
- Ashooriha, Morteza,Emami, Saeed,Kardan, Mostafa,Khoshneviszadeh, Mahsima,Khoshneviszadeh, Mehdi,Rafiei, Alireza,Yazdian-Robati, Rezvan
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- A strategic approach to the synthesis of ferrocene appended chalcone linked triazole allied organosilatranes: Antibacterial, antifungal, antiparasitic and antioxidant studies
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A series of ferrocene appended chalcone allied triazole coupled organosilatranes (FCTSa 7–FCTSa 12) were synthesised with the aim of amalgamating the pharmacological action of the constituting moieties into a single molecular scaffold. All the synthesised
- Singh, Gurjaspreet,Arora, Aanchal,Kalra, Pooja,Maurya, Indresh Kumar,Ruizc, Cristobal Espinosa,Estebanc, M. Angeles,Sinha, Shweta,Goyal, Kapil,Sehgal, Rakesh
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- Synthesis, characterization and biological evaluation of novel dihydropyranoindoles improving the anticancer effects of HDAC inhibitors
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The dihydropyranoindole scaffold was identified as a promising target for improving the anti-cancer activity of HDAC inhibitors from the preliminary screening of a library of compounds. A suitable methodology has been developed for the preparation of novel dihydropyranoindoles via the Hemetsberger indole synthesis using azido-phenylacrylates, derived from the reaction of corresponding alkynyl-benzaldehydes with methyl azidoacetate, followed by thermal cyclization in high boiling solvents. Anti-cancer activity of all the newly synthesized compounds was evaluated against the SH-SY5Y and Kelly neuroblastoma cells as well as the MDA-MB-231 and MCF-7 breast adenocarcinoma cell lines. Biological studies showed that the tetracyclic systems had significant cytotoxic activity at higher concentration against the neuroblastoma cancer cells. More importantly, these systems, at the lower concentration, considerably enhanced the SAHA toxicity. In addition to that, the toxicity of designated systems on the healthy human cells was found to be significantly less than the cancer cells.
- Arndt, Greg M.,Bingul, Murat,Black, David StC,Cheung, Belamy B.,Kumar, Naresh,Marshall, Glenn M.
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- APOPTOSIS INHIBITORS
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The invention provides compounds that are inhibitors or covalent modifiers of succinate dehydrogenase subunit B (SDHB) and/or inhibitors of apoptosis, and pharmaceutically acceptable salts, hydrides and stereoisomers thereof. The compounds are employed in pharmaceutical compositions, and methods of making and use, including treating a person in need thereof with an effective amount of the compound or composition.
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Paragraph 0376
(2018/02/27)
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- Curcuminoid-BF2 complexes: Synthesis, fluorescence and optimization of BF2 group cleavage
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Eight difluoroboron complexes of curcumin derivatives carrying alkyne groups containing substituents have been synthesized following an optimised reaction pathway. The complexes were received in yields up to 98% and high purities. Their properties as fluo
- Weiss, Henning,Reichel, Jeannine,G?rls, Helmar,Schneider, Kilian Rolf Anton,Micheel, Mathias,Pr?hl, Michael,Gottschaldt, Michael,Dietzek, Benjamin,Weigand, Wolfgang
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supporting information
p. 2264 - 2272
(2017/11/16)
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- Synthesis and Biological Evaluation of 1,2,3-triazole tethered Pyrazoline and Chalcone Derivatives
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A series of pyrazoline derivatives and corresponding chalcone intermediates with substituents same as combretastatin-A4(CA-4) conjugated with triazole nucleus has been synthesized and evaluated for their anticancer potential. Sulphorhodamine B(SRB) assay indicated compound 12c to be the most active compound from the series with GI50 value of 6.7 μm against the human liver carcinoma cell line HepG2. Interestingly, the intermediate 11c exhibited more promising cytotoxicity demonstrating GI50 value of 1.3 μm against the prostate cancer cell line DU145. Compounds 11c and 12c caused accumulation of cells in G2/M phase and inhibited tubulin polymerization. Furthermore, these compounds reduce the mitochondrial membrane potential and activate caspases 3 and 9, thereby indicating their ability to trigger apoptosis.
- Hussaini, Syed Mohammed Ali,Yedla, Poornachandra,Babu, Korrapati Suresh,Shaik, Thokhir B.,Chityal, Ganesh Kumar,Kamal, Ahmed
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- Combinatorial synthesis of structurally diverse triazole-bridged flavonoid dimers and trimers
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Flavonoids are a large family of compounds associated with a broad range of biologically useful properties. In recent years, synthetic compounds that contain two flavonoid units linked together have attracted attention in drug discovery and development projects. Numerous flavonoid dimer systems, incorporating a range of monomers attached via different linkers, have been reported to exhibit interesting bioactivities. From a medicinal chemistry perspective, the 1,2,3-triazole ring system has been identified as a particularly attractive linker moiety in dimeric derivatives (owing to several favourable attributes including proven biological relevance and metabolic stability) and triazole-bridged flavonoid dimers possessing anticancer and antimalarial activities have recently been reported. However, there are relatively few examples of libraries of triazole-bridged flavonoid dimers and the diversity of flavonoid subunits present within these is typically limited. Thus, this compound type arguably remains underexplored within drug discovery. Herein, we report a modular strategy for the synthesis of novel and biologically interesting triazole-bridged flavonoid heterodimers and also very rare heterotrimers from readily available starting materials. Application of this strategy has enabled step-efficient and systematic access to a library of structurally diverse compounds of this sort, with a variety of monomer units belonging to six different structural subclasses of flavonoid successfully incorporated.
- Sum, Tze Han,Sum, Tze Jing,Galloway, Warren R. J. D.,Collins, Súil,Twigg, David G.,Hollfelder, Florian,Spring, David R.
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- Synthesis of newer 1,2,3-triazole linked chalcone and flavone hybrid compounds and evaluation of their antimicrobial and cytotoxic activities
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The present study was carried out in an attempt to synthesize a new class of antimicrobial and antiplasmodial agents by copper catalyzed click chemistry to afford 25 compounds 10-14(a-e) of 1,4-disubstituted-1,2,3-triazole derivatives of chalcones and flavones. The structures of the newly synthesized compounds were established by elemental analysis, IR, 1H NMR, 13C NMR and Mass spectral data. The newly synthesized compounds were evaluated for their antibacterial activity against Gram positive bacteria (Staphylococcus aureus, Enterococcus faecalis), Gram negative bacteria (Escherichia coli, Pseudomonas aeruginosa, Shigella boydii, Klebsiella pneumoniae) and antifungal activity against (Candida albicans, Candida tropicalis, Candida parapsilosis, Cryptococcus neoformans, Dermatophyte) as well as molds (Aspergillus niger, Aspergillus fumigatus). The antiplasmodial and cytotoxic activities of these compounds were also evaluated against human malaria parasite Plasmodium falciparum strain 3D7 and human hepato-cellular carcinoma cells (Huh-7), respectively. Compounds 10a, 10c, 10d, 12c and 14e showed promising antibacterial activity while compounds 10e, 11d, 11e, 12c, 13a, 13b, 13e, 14a and 14d showed good antifungal activity as compared to the corresponding standard drugs. Compound 10b was found to be the most active against Plasmodium falciparum while the remaining compounds showed moderate to weak antiplasmodial activity. However, cytotoxic activities of all compounds were found ineffective against Huh-7 cells.
- Kant, Rama,Kumar, Dharmendra,Agarwal, Drishti,Gupta, Rinkoo Devi,Tilak, Ragini,Awasthi, Satish Kumar,Agarwal, Alka
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- Design, synthesis and molecular docking studies of novel N-benzenesulfonyl-1,2,3,4-tetrahydroisoquinoline-based triazoles with potential anticancer activity
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A novel series of N-benzenesulfonyl-1,2,3,4-tetrahydroisoquinolines (14-33) containing triazole moiety were designed and synthesized through rational cycloadditions using the modified Pictet-Spengler reaction and the Click chemistry. Antiproliferative act
- Pingaew, Ratchanok,Mandi, Prasit,Nantasenamat, Chanin,Prachayasittikul, Supaluk,Ruchirawat, Somsak,Prachayasittikul, Virapong
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p. 192 - 203
(2014/06/09)
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- Evaluation and optimization of antifibrotic activity of cinnamoyl anthranilates
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Tranilast is an anti-inflammatory drug in use for asthma and atopic dermatitis. In studies over the last decade it has been revealed that tranilast can reduce fibrosis occurring in the kidney during diabetes, thereby delaying and/or preventing kidney dysfunction. We report a structure-activity study aimed at optimizing the antifibrotic activity of tranilast. A series of cinnamoyl anthranilates were prepared and assessed for their ability to prevent TGF-β-stimulated production of collagen in cultured renal mesangial cells. We reveal derivatives with improved potency and reduced cellular toxicity relative to tranilast. 3-Methoxy-4-propargyloxycinnamoyl anthranilate reduces albuminuria in a rat model of progressive diabetes, and thus has potential as an innovative treatment for diabetic nephropathy.
- Zammit, Steven C.,Cox, Alison J.,Gow, Renae M.,Zhang, Yuan,Gilbert, Richard E.,Krum, Henry,Kelly, Darren J.,Williams, Spencer J.
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supporting information; experimental part
p. 7003 - 7006
(2010/07/08)
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- THERAPEUTIC COMPOUNDS
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Substituted cinnamoyl anthranilate compounds exhibiting anti-fibrotic activity; or derivatives thereof, analogues thereof, pharmaceutically acceptable salts thereof, and metabolites thereof; with the proviso that the compound is not Tranilast.
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(2008/06/13)
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- Palladium-catalyzed cleavage of O/N-propargyl protecting groups in aqueous media under a copper-free condition
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(Figure presented) A copper-free palladium-mediated cleavage of O/N-propargyl bonds in aqueous media has been investigated, affording a mild and convenient method for the deprotection of phenols and anilines. The methodology could be utilized for the selective removal of propargyl groups from aryl ethers and amines without affecting a variety of unprotected functional groups present in the substrates. The mechanism and scope of the reaction is discussed.
- Pal, Manojit,Parasuraman, Karuppasamy,Yeleswarapu, Koteswar Rao
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p. 349 - 352
(2007/10/03)
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- Regioselective protection of the 4-hydroxyl of 3,4-dihydroxy-benzaldehyde
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The regioselective protection of the 4-hydroxyl group of 3,4-dihydroxy-benzaldehyde was accomplished with seven different protecting groups (benzyl, p-methoxybenzyl, o-nitrobenzyl, 2,6-dichlorobenzyl, 3,4-dichlorobenzyl, vinyl and propargyl) in yields ranging between 67-75percent.
- Plourde, Guy L.,Spaetzel, Randy R.
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p. 697 - 705
(2007/10/03)
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- Total synthesis of chelerythrine, a benzo[c]phenanthridine alkaloid
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By taking advantage of our novel synthetic methods involving CsF-mediated Claisen rearrangement of an aryl propargyl ether to a 2-methylbenzolfuran and oxidative cleavage of the furan ring to a salicylaldehyde, total synthesis of chelerythrine, a benzo[c]phenanthridine alkaloid, was accomplished via the common intermediate (5) prepared through the two routes shown in Chart 3.
- Ishii,Ishikawa,Takeda,Suzuki,Harayaya
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p. 2002 - 2006
(2007/10/02)
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