16714-23-1

A catalyst-controlled highly chemoselective and regioselective intramolecular cycloamidation of triazol-1-ylbenzamides toward the synthesis of scarcely known heterocycles is reported. In the presence of a palladium catalyst, this cycloisomerization reacti

The progestational potency and selectivity of synthetic steroidal agonists can be enhanced by even larger chemical moieties at 17α-position of the steroid backbones. Hereby a series 5a-c and 6a-c of novel 17α-[1-(substituted phenyl)-1,2,3-triazol-4-yl]-19-nortestosterone-17β-yl acetates were designed and synthesized using click chemistry approach searching progestogenic derivatives with potential anticancer activity. Compounds 5a,b and 6a,c have affected to different extents the three histopatho-logical parameters considered for evaluation of their progestational activity. The compounds 5a,b and 6a,c showed modifications in rat uterus at 35.7-34.8 nM levels with privileged endometrial thickening effect and least change of uterine weight relative to NEA at 52.9 nM level. Up to 40 mg/kg dose compounds 5b and 6c were non-toxic. Molecular docking of the ligands in PR showed in the majority of cases a conformational fitting into the active site different from that of the reference steroid NEA. Compound 6b revealed about 46.4% growth inhibition of CNS cancer SNB-75 cell line, 56% growth inhibition of renal cancer A498 cell line and 56.7% growth inhibition of prostate cancer PC-3 cell line which was mediated by cell cycle arrest. Drugability of the screened compounds showed tolerated results after being challenged to diverse physicochemical parameters.

A rapid synthesis of aryl azides from the corresponding aryl halides catalyzed by CuI/diamine is described. Sodium ascorbate was found to have a positive effect on stabilization of the catalyst system. The reactions were performed under very mild conditions generally with high yields. In the case of aryl iodides, the transformation could be carried out at room temperature. Georg Thieme Verlag Stuttgart.

We have obtained the X-ray crystal structure of the galectin-8 N-terminal domain (galectin-8N) with a previously reported quinoline–galactoside ligand at a resolution of 1.6 ?. Based on this X-ray structure, a collection of galactosides derivatised at O3 with triazole, benzimidazole, benzothiazole, and benzoxazole moieties were designed and synthesised. This led to the discovery of a 3-O-(N-methylbenzimidazolylmethyl)–galactoside with a Kd of 1.8 μM for galectin-8N, the most potent selective synthetic galectin-8N ligand to date. Molecular dynamics simulations showed that benzimidazole–galactoside derivatives bind the non-conserved amino acid Gln47, accounting for the higher selectivity for galectin-8N. Galectin-8 is a carbohydrate-binding protein that plays a key role in pathological lymphangiogenesis, modulation of the immune system, and autophagy. Thus, the benzimidazole-derivatised galactosides represent promising compounds for studies of the pathological implications of galectin-8, as well as a starting point for the development of anti-tumour and anti-inflammatory therapeutics targeting galectin-8.

Carbon isotope labeling is a traceless technology, which allows tracking the fate of organic compounds either in the environment or in living organisms. This article reports on a general approach to label urea derivatives with all carbon isotopes, including14C and11C, based on a Staudinger aza-Wittig sequence. It provides access to all aliphatic/aromatic urea combinations.

Three series of novel 1H-1,2,3-triazole-4-carboxamides: 1-aryl-5-alkyl/aryl-1H-1,2,3-triazole-4-carboxamides, 1-aryl-5-amino-1H-1,2,3-triazole-4-carboxamides and 1,2,3-triazolo[1,5-a]quinazoline-3-carboxamides were synthesized via base-mediated click azide reactions. Compounds were evaluated for their antimicrobial activities against primary pathogens: Gram-positive and Gram-negative bacterial strains Escherichia coli, Klebsiella pneumonia, Acinetobacter baumannii, Pseudomonas aeruginosa, Staphylococcus aureus, as well as fungal strain Cryptococcus neoformans var. grubii and Candida albicans. Compounds exhibiting moderate to good activities were selected for SAR analysis. Several 5-methyl-1H-1,2,3-triazole-4-carboxamides 4d, 4l, 4r, showed potent antibacterial effect against S. aureus. On the contrary, 5-amino-1H-1,2,3-triazole-4-carboxamide 8b and [1,2,3]triazolo[1,5-a]quinazoline-3-carboxamide 9a were active against pathogenic yeast C. albicans. Thus, compound 4l under 1 μM demonstrated 50% growth inhibition against S. aureus. At the same concentration, the compound 9a killed approx. 40% of C. albicans cells. In general, these compounds demonstrated selective action and no significant impact on the viability of human keratinocytes of HaCaT line.

The present invention relates to a compound according to formula (I), wherein R1 and R5 are independently selected from H, halogen, hydroxyl, NO2, CN, C1-C6-alkyl optionally substituted by one or more R11, C1-C6-alkoxy optionally substituted by one or more R11, C3-C6-cycloalkyl optionally substituted by one or more R11, -Cn-alkyl-N(R12)(R13) with n=0-3, -Cn-alkyl-C(O)N(R12)(R13) with n=0-3, -SO2-N(R14)-C(O)-R15; -Cn-alkyl-N(R14)-C(O)-R15 with n=0-3, -Cn-alkyl-C(O)-OR16 with n=0-3, -O(C1-C3-alkyl-O)m-C1-C3-alkyl-OR10 with m=0-3, -Cn-alkyl-OR16 with n=0-3, -NH-Cn-alkyl-R18 with n=0-3; -O-Cn-alkyl-R18 with n=0-3; -OPO(OR10)2, -PO(OR10)2, and a heterocycle optionally substituted by one or more R17; R3 is selected from halogen, hydroxyl, NO2, CN, C1-C6-alkyl optionally substituted by one or more R11, C1-C6-alkoxy optionally substituted by one or more R11, C3-C6-cycloalkyl optionally substituted by one or more R11, -Cn-alkyl-N(R12)(R13) with n=0-3, -Cn-alkyl-C(O)N(R12)(R13) with n=0-3, -SO2-N(R14)-C(O)-R15; -Cn-alkyl-N(R14)-C(O)-R15 with n=0-3, -Cn-alkyl-C(O)-OR16 with n=0-3, -O(C1-C3-alkyl-O)m-C1-C3-alkyl-OR10 with m=0-3, -Cn-alkyl-OR16 with n=0-3, -NH-Cn-alkyl-R18 with n=0-3; -O-Cn-alkyl-R18 with n=0-3; -OPO(OR10)2, -PO(OR10)2, and a heterocycle optionally substituted by one or more R17; R2 and R4 are independently selected from H, halogen, C1-C6-alkyl optionally substituted by one or more R11; R6, R7, R8 and R9 are independently selected from H, halogen, hydroxyl, NO2, CN, C1-C6-alkyl optionally substituted by one or more R11, C1-C6-alkoxy optionally substituted by one or more R11, C3-C6-cycloalkyl optionally substituted by one or more R11, -Cn-alkyl-N(R12)(R13) with n=0-3, -Cn-alkyl-C(O)N(R12)(R13) with n=0-3, -SO2-N(R12)(R13), -SO2-N(R14)-C(O)-R15; -Cn-alkyl-N(R14)-C(O)-R15 with n=0-3, -Cn-alkyl-C(O)-OR16 with n=0-3, -O(C1-C3-alkyl-O)m-C1-C3-alkyl-OR10 with m=0-3, -Cn-alkyl-OR16 with n=0-3, -NH-Cn-alkyl-R18 with n=0-3; -O-Cn-alkyl-R18 with n=0-3; -OPO(OR10)2, -PO(OR10)2, and a heterocycle optionally substituted by one or more R17; R10 is selected from H and C1-C6-alkyl optionally substituted by one or more R11; said one or more R11 is independently selected from Cl, F and hydroxy; R12, R13, R14, R15 and R16 are independently selected from H, C1-C6-alkyl optionally substituted by one or more R11, C3-C6-cycloalkyl optionally substituted by one or more R11, -SO2-C1-C6-alkyl optionally substituted by one or more R11, or wherein said R12 and R13 together with the nitrogen to which they are attached form a heterocycle optionally substituted by one or more R17; said one or more R17 is independently selected from halogen, hydroxy, NO2, CN, -N(R12)(R13), -C(O)-R16, -C(O)-OR16, -Cn-alkyl-OR16 with n=0-3, C1-C6-alkyl optionally substituted by one or more R11, and C1-C6-alkoxy optionally substituted by one or more R11; R18 is selected from -N(R12)(R13), -OR10, -C(O)-R16, -C(O)-OR16, -C(O)- N(R12)(R13), CN, and a heterocycle optionally substituted by one or more R17; and wherein at least one of R1, R2, R4, R5, R6, R7, R8 or R9 is not H; and pharmaceutically acceptable salts, stereoisomers, enantiomers, tautomers of the compounds of formula (I) as well as pharmaceutical compositions thereof and their uses in methods of reducing the virulence of bacteria that express AgrA, in methods for preventing or treating diseases caused or exacerbated by bacteria, preferably by Staphylococcus aureus, such as skin or lung infections or atopic dermatitis.

Gankyrin is an oncoprotein overexpressed in numerous cancer types and appears to play a key role in regulating cell proliferation, cell growth, and cell migration. These roles are largely due to gankyrin's protein-protein interaction with the 26S proteaso

Aminopeptidase N (APN) has been proved to be deeply associated with cancer angiogenesis, metastasis and invasion. Therefore, APN gains increasing attention as a promising anti-tumor target. In the current study, we report the design, synthesis, biological evaluation and structure-activity relationship of one new series of leucine ureido derivatives containing the 1,2,3-triazole moiety. Among them, compound 31f was identified as the best APN inhibitor with IC50 value being two orders of magnitude lower than that of the positive control bestatin. Compound 31f possessed selective cytotoxicity to several tumor cell lines over the normal cell line human umbilical vein endothelial cells (HUVECs). Notably, when combined with 5-fluorouracil (5-Fu), 31f exhibited synergistic anti-proliferation effect against several tumor cell lines. At the same concentration, 31f exhibited much better anti-angiogenesis activities than bestatin in the HUVECs capillary tube formation assay and the rat thoracic aorta rings test. In the in vitro anti-invasion assay, 31f also exhibited superior potency over bestatin. Moreover, considerable in vivo antitumor potencies of 31f alone or in combination with 5-Fu were observed without significant toxic signs in a mouse heptoma H22 tumor transplant model.

An efficient and regioselective synthesis of novel 1,2,3-triazole-fused-1,5-benzoxazocinones through intramolecular cyclization of substituted ethynyl triazoyl benzoic acids was explored. A crucial precursor 5-iodo-1,2,3-triazole benzoate was obtained fro

Fischer's approach towards the synthesis of aryl azides and triazinoles from diazonium salts and hydroxylammonium chloride (phenylhydraxylamine) was reinvestigated and optimized. The new methodology enables the preparation of aryl azides and triazinoles in high yields in water at room temperature. The procedure is very simple, robust, easily scalable, reproducible, and "green".

[Figure not available: see fulltext.] A method for the synthesis of 6-substituted 12-oxo-6,12-dihydroazepino[2,1-b]quinazolines via a photoinitiated reaction of orthosubstituted aryl azides with sodium 2-aminobenzoate is proposed. Stepwise annulation of t

Two sets of new conjugates obtained from d-mannose derivatives and o-, m-, and p-substituted benzoic acid esters interconnected through a triazole ring were synthesized by Cu(I) catalyzed azide-alkyne cycloaddition. All synthesized compounds were tested for their in vitro cytotoxic activity against seven cancer cell lines with/without multidrug resistance phenotype as well as non-tumor MRC-5 and BJ fibroblasts. Butyl ester of 4-aminobenzoic acid 6c showed the highest activity among all tested compounds, however, it was active only against K562 myeloid leukemia cells. N-Glycosyltriazole conjugates, both acetylated and nonacetylated at mannose moiety, were almost completely inactive. In contrast, some of the acetylated O-glycosyl conjugates showed cytotoxic activity which was cell line dependent and strongly affected by position of benzoic acid substitution as well as a length of its ester alkyl chain; the most potent compound was acetylated mannoside conjugated with octyl ester of m-substituted benzoic acid. However, deacetylation resulting in hydrophilicity increase of the glycosides almost completely abolished their cytotoxic potency.

Dimethyl acetylenedicarboxylate (DMAD) undergoes efficient Huisgen 1,3-dipolar cycloaddition reaction with various X-substituted aryl azides (X = 2C1, 3C1, 2COOCH3, 4COOCH3), applying two different conditions, under conventional stir

Photolysis of aryl azides to give nitrenes, and their subsequent rearrangement in the presence of water to give 3H-azepinones, is performed in continuous flow in a photoreactor constructed of fluorinated ethylene polymer (FEP) tubing. Fine tuning of the reaction conditions using the flow reactor allowed minimization of secondary photochemical reactions.

Here we present the solution phase parallel synthesis of a combinatorial library consisting of 776 new substituted 3-phenylsulfonyl-[1,2,3]triazolo[1,5- a]quinazolines and a study of the relation of their structure with a 5-HT 6 receptor antagonistic activity in a functional cell (HEK 293) analysis and radioligand competitive binding. We have found highly active and selective 5-HT6R antagonists. The most active 5-HT6R antagonists have IC50 i 10 nM in a binding assay, which is 100 times higher than the activity with respect to other serotonin receptors.

(Chemical Equation Presented) Synthesis of novel 3-substituted-1,2,3- triazolo[1,5-a]quinazolinones in high yields was performed via anionic hetero-domino reaction of appropriate substituted 2-azidobenzoates prepared from isatines and acetonitriles activated by 1,3-thiazole, 1,3-benzothiazole, 1,3,4-oxadiazole, and 1,2,4-oxadiazole rings. It was shown that acetonitriles exhibited high reactivity and were convenient methylenic compounds for such reactions providing rapid structural variation.

A small molecule (1835F03) that inhibits Staphylococcus aureus wall teichoic acid biosynthesis, a proposed antibiotic target, has been discovered. Rapid, parallel, solution-phase synthesis was employed to generate a focused library of analogs, providing detailed information about structure-activity relationships and leading to the identification of targocil, a potent antibiotic.

Broad-band irradiation (λ > 350 nm) of 2-(methoxycarbonyl)phenyl azide (1) in Ar at 10 K monitored by IR and UV-vis spectroscopy resulted in the formation of at least five major products, all of which were shown to be photointerconvertible under these con

The photolyses of ortho-substituted aryl azides (o-XC6H4N3 where X = CONHNH2, CONHN=CHAr, NO2, CN, CF3, SO2OMe, SO2NH2, or SO2Ph) in methanol-tetrahydrofuran solution are described.With X = CF3 or CONHN=CHAr, 3-substituted 2-methoxy-3H-azepines are products, while in other cases polymeric products, amines or mixtures of isomeric azepines are obtained.The product from the photolysis of o-azidophenyl phenyl sulphoxide (X = SOPh) is identified tentatively (n.m.r. evidence) as 7-methoxy-2-phenylsulphinyl-3H-azepine.In contrast, methyl p-azidobenzoate and p-cyanophenyl azide yield the corresponding 5-substituted 2-methoxy-3H-azepines, whereas methyl m-azidobenzoate yields only methyl 2-methoxy-3H-azepine-6-carboxylate.Irradiation of methyl o-azidobenzoate in aqueous tetrahydrofuran gives 1,3-dihydro-3-methoxycarbonyl-2H-azepin-2-one.

Several p-nitrobenzoate and o-nitrobenzoate esters have been found to undergo competing SNAr and SN2 reactions with azide, alkoxide, and thiophenoxide ions. SNAr displacement of the nitro group even competes with SN2 displacement on the methyl group of methyl esters 1c and 11. Esters 1a and 1b undergo predominately SNAr displacements with azide, whereas 1c undergoes predominately an SN2 displacement with azide. Both 1b and 1c undergo predominately SNAr reactions with alkoxides and thiophenoxide. The SNAr products from the azide reactions consist of mixtures of p-azidobenzoates, p-aminobenzoates, and 4,4′-azodibenzoates whose compositions depend upon the reaction conditions.