- Synthesis, cytotoxic, antibacterial and free radical scavenging activities of new 1,2,4-triazole schiff bases
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Twelve new 1,2,4-triazole Schiff bases bearing a fluorinated indole ring were successfully synthesized. The 1,2,4-triazole Schiff bases were synthesized from the condensation reaction of 4-amino-5-mercapto-3-[(5-fluoro-2-methyl-1H-indol-3-yl)methyl]-1,2,4-triazole with a series of ben-zaldehyde derivatives in the presence of (+)-tartaric acid as the catalyst. The structures of Schiff bases were elucidated by FTIR, NMR and mass spectral data. All newly synthesized Schiff bases were screened for their cytotoxic, antibacterial and free radical scavenging activities. Schiff bases 6b, 6c, 6i and 6j with hydroxyl group at ortho or meta position of the phenyl ring demonstrated higher cytotoxic activity against COLO-205 cell lines with IC50 94.0-144.3 μmol/mL. Schiff base bearing 2-OH and 5-Cl groups showed moderate antibacterial activity against Bacillus cereus at MIC 151 μmol/mL. On the other hand, compounds 6b (IC50 150.4 μmol/mL), 6e (IC50 146.4 μmol/mL), 6f (IC50 120.9 μmol/mL) and 6g (IC50 146.2 μmol/mL) displayed a better free radical scavenging activity than the standard BHT.
- Gan, Kwang-Chun,Sim, Kooi-Mow,Lim, Tuck-Meng,Teo, Kah-Cheng
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p. 191 - 198
(2020/02/29)
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- Indole compounds with: N-ethyl morpholine moieties as CB2 receptor agonists for anti-inflammatory management of pain: Synthesis and biological evaluation
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The CB2 receptor plays a crucial role in analgesia and anti-inflammation. To develop novel CB2 agonists with high efficacy and selectivity, a series of indole derivatives with N-ethyl morpholine moieties (compounds 1-56) were designed, synthesized and biologically evaluated. Compounds 1, 2, 3, 46 and 53 exhibited high CB2 receptor affinity at low nanomolar concentrations and good receptor selectivity (EC50(CB1)/EC50(CB2) greater than 1000). The most active compound, compound 2, was more potent than the standard drug GW405833 for in vitro agonistic action on the CB2 receptor. More importantly, in a rat model for CFA-induced inflammatory hyperalgesia, compound 2 had a potent anti-inflammatory pain effect within 12 hours after administration. At the 1 h time point, compound 2 had a dose-dependent reversal for hyperalgesia with an estimated ED50 value of 1.097 mg kg-1. Moreover, compound 2 significantly suppressed the pro-inflammatory cytokines (IL-1β, IL-6 and TNF-α) in CFA-induced lesions. These protective effects of compound 2 on inflammatory pain were superior to those of GW405833, suggesting that compound 2 may be a promising therapeutic drug that needs further validation.
- Ji, Jing,Li, Jiaojiao,Li, Zhengfu,Xu, Ruibo
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p. 1935 - 1947
(2019/11/20)
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- Discovery of selective indole-based prostaglandin D2 receptor antagonist
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A series of N-benzoyl-2-methylindole-3-acetic acids were synthesized and biologically evaluated as prostaglandin (PG) D2 receptor antagonists. Some of the selected compounds significantly inhibited OVA-induced vascular permeability in guinea pig conjunctiva after oral dosing. Structure-activity relationship study is presented.
- Iwahashi, Maki,Shimabukuro, Atsushi,Onoda, Takahiro,Matsunaga, Yoko,Okada, Yutaka,Matsumoto, Ryoji,Nambu, Fumio,Nakai, Hisao,Toda, Masaaki
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body text
p. 4574 - 4588
(2011/09/19)
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- Use of indole-3-acetic acid derivatives in medicine
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Compounds of formula (I), or physiologically functional derivatives thereof, wherein: R1, R2, R3 and R′3 are independently selected from II or lower alkyl; and R4, R5, R6 and R7 are independently selected from H, electron withdrawing groups (such as F, Cl, Br, I, OCF3, carboxyl groups, acetal groups, electron deficient aryl groups), lower alkyl groups lower alkoxy groups, aryl groups or aryloxy groups, wherein it least one of R4, R5, R6, and R7 is selected from an electron withdrawing group, may be used in methods of therapy, particular in treating neoplastic diseases in methods of GDEPT, ADPET, PDEPT and PDT
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- Indole-3-acetic acid derivatives
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Compounds of formula (I), or physiologically functional derivatives thereof, wherein: R1, R2, R3 and R′3 are independently selected from H or lower alkyl; and R4, R5, R6 and R7 are independently selected from H, electron withdrawing groups (such as F, Cl, Br, I, OCF3, carboxyl groups, acetal groups, electron deficient aryl groups), lower alkyl groups, lower alkoxy groups, aryl groups or aryloxy groups, wherein at least one of R4, R5, R6 and R7 is selected from an electron withdrawing group, may be used in methods of therapy, particular in treating neoplastic diseases in methods of GDEPT, ADPET, PDEPT and PDT.
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- 4-AMINOMETHYL-1-ARYL-CYCLOHEXYLAMINE DERIVATIVES
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The invention concerns 4-aminomethyl-1-aryl-cyclohexylamine derivatives, methods for producing same, medicines containing said compounds and the use of 4-aminomethyl-1-aryl-cyclohexylamine derivatives for producing medicines.
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- USE OF INDOLE-3-ACETIC ACID DERIVATIVES IN MEDICINE
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Compounds of formula (I), or physiologically functional derivatives thereof, wherein: R1, R2, R3 and R'3 are independently selected from II or lower alkyl; and R4, R5, R6 and R7 are independently selected from H, electron withdrawing groups (such as F, Cl, Br, I, OCF3, carboxyl groups, acetal groups, electron deficient aryl groups), lower alkyl groups lower alkoxy groups, aryl groups or aryloxy groups, wherein it least one of R4, R5, R6, and R7 is selected from an electron withdrawing group, may be used in methods of therapy, particular in treating neoplastic diseases in methods of GDEPT, ADPET, PDEPT and PDT
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- Halogenated indole-3-acetic acids as oxidatively activated prodrugs with potential for targeted cancer therapy
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Substituted indole-3-acetic acid (IAA) derivatives, plant auxins with potential for use as prodrugs in enzyme-prodrug directed cancer therapies, were oxidised with horseradish peroxidase (HRP) and toxicity against V79 Chinese hamster lung fibroblasts was determined. Rate constants for oxidation by HRP compound I were also measured. Halogenated IAAs were found to be the most cytotoxic, with typical surviving fractions of -3 after incubation for 2 h with 100 μM prodrug and HRP.
- Rossiter, Sharon,Folkes, Lisa K.,Wardman, Peter
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p. 2523 - 2526
(2007/10/03)
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- New N-(pyridin-4-yl)-(indol-3-yl)acetamides and propanamides as antiallergic agents
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A series of new N-(pyridin-4-yl)-(indol-3-yl)alkylamides 44-84 has been prepared in the search of novel antiallergic compounds. Synthesis of the desired ethyl (2-methyindol-3-yl)acetates 1-4 was achieved by indolization under Fischer conditions; Japp-Klingemann method followed by 2- decarboxylation afforded the ethyl (indol-3-yl)alkanoates 17-25. Amidification was successfully carried out by condensation of the corresponding acids or their N-aryl(methyl) derivatives with 4-aminopyridine promoted by 2-chloro-1-methylpyridinium iodide. Efforts to improve the antiallergic potency of the title series by variation of the indole substituents (R1, R2, R) and the length of the alkanoic chain (n = 1, 2, 3) led to the selection of N-(pyridin-4-yl)-[1-(4-fluorobenzyl)indol-3- yl]acetamide 45, out of 41 compounds. This amide was 406-fold more potent than astemizole in the ovalbumin-induced histamine release assay, using guinea pig peritoneal mast cells, with an IC50 = 0.016 μM. Its inhibitory activity in IL-4 production test from Th-2 cells was identical to that of the reference histamine antagonist (IC50 = 8.0 μM) and twice higher in IL-5 assay: IC50 = 1.5 and 3.3 μM, respectively. In vivo antiallergic activity evaluation confirmed efficiency of 45 in sensitized guinea pig late phase eosinophilia inhibition, after parenteral and oral administration at 5 and 30 mg/kg, respectively. Its efficiency in inhibition of microvascular permeability was assessed in two rhinitis models; ovalbumin and capsaicin- induced rhinorrhea could be prevented after topical application of submicromolar concentrations of 45 (IC50 = 0.25 and 0.30 μM); and it also exerted significant inhibitory effect in the first test after iv and oral administration, with ID50 = 0.005 and 0.46 mg/kg.
- Menciu, Cecilia,Duflos, Muriel,Fouchard, Fabienne,Le Baut, Guillaume,Emig, Peter,Achterrath, Ute,Szelenyi, Istvan,Nickel, Bernd,Schmidt, Jürgen,Kutscher, Bernhard,Günther, Eckhardt
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p. 638 - 648
(2007/10/03)
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- Cis-mono and disubstituted-2-methyl-3-[(piperazinyl) and (piperidino)ethyl]indolines, intermediates for their preparation and methods of preparation
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Novel substituted 3-[2-(4-phenyl or pyridyl-1-piperazinyl or piperidino)ethyl]indolines useful as antipsychotic agents in mammals as well as substituted 3-[2-(4-phenylpiperidino)ethyl]indole intermediates for their preparation.
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