- Synthesis of 4-, 5-, 6-, and 7-azidotryptamines
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Synthesis of azidotryptamines from commercially available nitroindoles via the corresponding amino tryptamines in good overall yields (15-38%) is presented.
- Friedrich, Anne,Br?se, Stefan,O'Connor, Sarah E.
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- Design, synthesis, and biological evaluation of N-(3-cyano-1H-indol-5/6-yl)-6-oxo-1,6-dihydropyrimidine-4-carboxamides and 5-(6-oxo-1,6-dihydropyrimidin-2-yl)-1H-indole-3-carbonitriles as novel xanthine oxidase inhibitors
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Xanthine oxidase (XO) has been an important target for the treatment of hyperuricemia and gout. The analysis of potential interactions of pyrimidinone and 3-cyano indole pharmacophores present in the corresponding reported XO inhibitors with parts of the XO active pocket indicated that they both can be used as effective fragments for the fragment-based design of nonpurine XO inhibitors. In this paper, we adopted the fragment-based drug design strategy to link the two fragments with an amide bond to design the type 1 compounds 13a–13w,14c, 14d, 14f, 14g, 14j, 14k, and 15g. Compound 13g displayed an evident XO inhibitory potency (IC50 = 0.16 μM), which was 52.3-fold higher than that of allopurinol (IC50 = 8.37 μM). For comparison, type 2 compounds 5-(6-oxo-1,6-dihydropyrimidin-2-yl)-1H-indole-3-carbonitriles (25c–25g) were also designed by linking the two fragments with a single bond directly. The results showed that compound 25c from the latter series displayed the best inhibitory potency (IC50 = 0.085 μM), and it was 98.5-fold stronger than that of allopurinol (IC50 = 8.37 μM). These results suggested that amide and single bonds were applicable for linking the two fragments together to obtain potent nonpurine XO inhibitors. The structure–activity relationship results revealed that hydrophobic groups at N-atom of the indole moiety were indispensable for the improvement of the inhibitory potency in vitro against XO. In addition, enzyme kinetics studies suggested that compounds 13g and 25c, as the most promising XO inhibitors for the two types of target compounds, acted as mixed-type inhibitors for XO. Moreover, molecular modeling studies suggested that the pyrimidinone and indole moieties of the target compounds could interact well with key amino acid residues in the active pocket of XO. Furthermore, in vivo hypouricemic effect demonstrated that compounds 13g and 25c could effectively reduce serum uric acid levels at an oral dose of 10 mg/kg. Therefore, compounds 13g and 25c could be potential and efficacious agents for the treatment of hyperuricemia and gout.
- Zhang, Bing,Duan, Yulin,Yang, Yuwei,Mao, Qing,Lin, Fengwei,Gao, Jun,Dai, Xiwen,Zhang, Peng,Li, Qiuhua,Li, Jinxin,Dai, Ronghua,Wang, Shaojie
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- N-indole-1,6-dihydropyrimidine-4-carboxamide derivative as well as preparation method and application thereof
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The invention relates to an N-indole-1,6-dihydropyrimidine-4-carboxamide derivative as well as a preparation method and application thereof, belonging to the technical field of medicines. According to the invention, amide is innovatively applied as a connecting fragment in the design of a non-purine xanthine oxidase inhibitor, and the N-indole-1,6-dihydropyrimidine-4-carboxamide derivative is synthesized. An in-vitro xanthine oxidase inhibitory activity test is carried out on the designed derivative by adopting an ultraviolet spectrophotometric method, and the prepared derivative shows obvious xanthine oxidase inhibitory activity. In an acute hyperuricemia rat model test, the derivative can significantly reduce the uric acid level of serum, and thus has good in-depth research value as the novel xanthine oxidase inhibitor.
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Paragraph 0083-0084
(2021/07/28)
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- 2-(1H-INDOLE-3-CARBONYL)-THIAZOLE-4-CARBOXAMIDE DERIVATIVES AND RELATED COMPOUNDS AS ARYL HYDROCARBON RECEPTOR (AHR) AGONISTS FOR THE TREATMENT OF E.G. ANGIOGENESIS IMPLICATED OR INFLAMMATORY DISORDERS
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2-(1H-lndole-3-carbonyl)-thiazole-4-carboxamide derivatives and the corresponding imidazole, oxazole and thiophene derivatives and related compounds as aryl hydrocarbon receptor (AHR) agonists for the treatment of angiogenesis implicated disorders, such as e.g. retinopathy, psoriasis, rheumatoid arthritis, obesity and cancer, or inflammatory disorders. The present description discloses the synthesis and characterisation of exemplary compounds as well as pharmacological data thereof (e.g. pages 27 to 32 and 59 to 219; examples 1 to 8; compounds 1-1 to 1-97; tables 1-a, 2 and 3).
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Paragraph 00162; 00364
(2021/06/26)
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- Method for synthesizing indole -3 - formaldehyde compounds (by machine translation)
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The invention relates to a synthetic indole - 3 - formaldehyde compounds, which belongs to the technical field of organic synthesis. The invention will be indole compound, hexamethylene tetramine, crystalline aluminum trichloride, N, N - dimethyl formamide in proportion in 120 °C reaction under the condition of 1 - 20 the H, then filtered, washing, filtering, concentrating, column chromatography purification and other after-treatment technology, make the refined indole - 3 - formaldehyde compound. The invention overcomes the indole - 3 - benzaldehyde compound of preparation need to use not stabilized peroxide, and for a long time under the high temperature reaction of the defect. And the invention uses the advantages of simple equipment, product yield is high, the resulting yield of a target product can be up to 94%. In addition, the invention relates to a low reaction conditions, less catalyst levels, low energy consumption, the post treatment process is simple and easy to use, without the need of using a high dosage of acid or alkali, post-processing the solvent can be recovered and recycled, industrial "three wastes" is discharged little, suitable for large-scale production. (by machine translation)
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Paragraph 0041-0044; 0131-0134
(2018/08/28)
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- Iron-Catalyzed C3-Formylation of Indoles with Formaldehyde and Aqueous Ammonia under Air
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An efficient iron-catalyzed C3-selective formylation of free (N-H) or N-substituted indoles was developed by employing formaldehyde and aqueous ammonia, with air as the oxidant. This new method gave 3-formylindoles in moderate to excellent yields with fairly short reaction times. Moreover, this procedure for catalytic formylation of indoles can be applied to gram-scale syntheses.
- Wang, Qing-Dong,Zhou, Bin,Yang, Jin-Ming,Fang, Dong,Ren, Jiangmeng,Zeng, Bu-Bing
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supporting information
p. 2670 - 2674
(2017/10/06)
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- Regioselective hydroarylation reactions of C3 electrophilic N-acetylindoles activated by FeCl3: An entry to 3-(Hetero)arylindolines
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A method for the direct and rare umpolung of the 3 position of indoles is reported. The activation of N-acetylindole with iron(III) chloride allows the C-H addition of aromatic and heteroaromatic substrates to the C2-C3 double bond of the indole nucleus to generate a quaternary center at C3 and leads regioselectively to 3-arylindolines. Optimization, scope (50 examples), practicability (gram scale, air atmosphere, room temperature), and mechanistic insights of this process are presented. Synthetic transformations of the indoline products into drug-like compounds are also described.
- Beaud, Rodolphe,Guillot, Regis,Kouklovsky, Cyrille,Vincent, Guillaume
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supporting information
p. 7492 - 7500
(2014/06/23)
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- ANTICANCER AGENT
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An anticancer agent comprising a compound represented by the formula (I) [R1 represents hydrogen atom, hydroxyl group, a C1-6alkoxy group and the like; R2 and R3 represents hydrogen atom, a halogen atom, a C1-6alkyl group and the like; R4 represents hydrogen atom, a C1-6alkyl group, a C1-6alkylsulfonyl group and the like; R5 represents hydrogen atom or a substituent; .... represents a single bond or a double bond; R6 and R7 represents hydrogen atom, a C1-6alkyl group and the like; R8 represents hydrogen atom, a C1-6alkyl group and the like; A represents -O-, -S-, or - CH2-; D represents -C= or -N=; X represents methylene group, -O-, or -CO-; Q represents -N= or -C(R8)=; and Y represents a heterocyclic group or amino group], which shows a superior inhibitory activity against pim-1 kinase.
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Paragraph 0219
(2013/03/26)
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- Creation of new promoters for plant's root growth: its application for the syntheses of vulcanine and borreline, and for combating desertification at gobi desert in inner mongolia 1#
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Abstract - Various new 2-substituted indole-3-carbaldehydes are prepared. Structurally related alkaloids, vulcanine and borreline, are synthesized as well. Among the compounds, 2-haloindole-3-carbaldehydes are found to be potent promoters of plant's root growth. Its successful preliminary application is reported for making Gobi desert in Inner Mongolia full of plant.
- Somei, Masanori,Sayama, Shinsuke,Naka, Katsumi,Shinmoto, Kotaro,Yamada, Fumio
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experimental part
p. 537 - 554
(2009/09/25)
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- Novel syntheses of 1-hydroxy-6- and -5-nitroindole-3-carbaldehydes, and their derivatives as daikon-phytoalexin analogs
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1-Hydroxy-6- and -5-nitroindole-3-carbaldehydes are prepared for the first time from 1-methoxy-6- and -5-nitroindole-3-carbaldehydes, respectively, based on the discovery of novel methyl ether cleavage reaction. Utilizing them as common synthetic intermed
- Yamada, Koji,Tomioka, Saori,Tanizawa, Norihiko,Somei, Masanori
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p. 1601 - 1611
(2007/10/03)
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- Synthesis of Indoles via Ring Closure of 2-Alkylnitroaniline Derivatives.
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A variety of nitroindoles have been prepared from imidate, amidine, and sec-anilide derivatives of 2-alkyl-3- or 5-nitroanilines by a base-induced cyclization promoted by dialkyl oxalates.It is shown that essentially the same procedure also can be used to synthesize the corresponding nitroindole-3-glyoxylates in one simple operation.The synthetic potential is discussed and a mechanism is proposed.
- Bergman, Jan,Sand, Peter
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p. 6085 - 6112
(2007/10/02)
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