- Chemoselective reduction of nitroarenes, N-acetylation of arylamines, and one-pot reductive acetylation of nitroarenes using carbon-supported palladium catalytic system in water
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Developing and/or modifying fundamental chemical reactions using chemical industry-favorite heterogeneous recoverable catalytic systems in the water solvent is very important. In this paper, we developed convenient, green, and efficient approaches for the chemoselective reduction of nitroarenes, N-acetylation of arylamines, and one-pot reductive acetylation of nitroarenes in the presence of the recoverable heterogeneous carbon-supported palladium (Pd/C) catalytic system in water. The utilize of the simple, effective, and recoverable catalyst and also using of water as an entirely green solvent along with relatively short reaction times and good-to-excellent yields of the desired products are some of the noticeable features of the presented synthetic protocols. Graphic abstract: [Figure not available: see fulltext.].
- Zeynizadeh, Behzad,Mohammad Aminzadeh, Farkhondeh,Mousavi, Hossein
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p. 3289 - 3312
(2021/05/11)
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- Synthetic method 5- of -4- (-1- I -3-)-(C)-(C)-ethyl-methyl-indol. (by machine translation)
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To the method, the 3 - indole chromogenic 5 - substrate is obtained, by hydrolyzing the indole phenol with acetic. anhydride, under an acidic condition with acetic, anhydride to form an indole, chromogenic substrate by hydrolyzing the, indole phenol, with acetic anhydride under an acidic, condition with acetic anhydride under an acidic condition 5 - 5 . (by machine translation)
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Paragraph 0018; 0020
(2020/02/06)
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- Anti-malarial, cytotoxicity and molecular docking studies of quinolinyl chalcones as potential anti-malarial agent
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Abstract: The quinolinyl chalcones series (A1–A14) were screened for antimalarial activity. According to in vitro antimalarial studies, many quinolinyl chalcones are potentially active against CQ-sensitive and resistance P. falciparum strains with no toxicity against Vero cell lines. The most active quinolinyl chalcones A4 (with IC50 0.031?μM) made a stable A4–heme complex with ??25?kcal/mole binding energy and also showed strong π–π interaction at 3.5??. Thus, the stable A4–heme complex formation suggested that these quinolinyl chalcones act as a blocker for heme polymerization. The docking results of quinolinyl chalcones with Pf-DHFR showed that the halogenated benzene part of quinolinyl chalcones made strong interaction with Pf-DHFR as compared to quinoline part. A strong A4–Pf-DHFR complex was formed with low binding energy (??11.04?kcal/mole). The ADMET properties of quinolinyl chalcones were also studied. The in vivo antimalarial studies also confirmed the A4 as an active antimalarial agent. Graphical abstract: [Figure not available: see fulltext.].
- Hameed, Asima,Masood, Sara,Hameed, Aamir,Ahmed, Ejaz,Sharif, Ahsan,Abdullah, Muhammad Imran
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p. 677 - 688
(2019/07/17)
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- Copper-(II) Catalyzed N-Formylation and N-Acylation of Aromatic, Aliphatic, and Heterocyclic Amines and a Preventive Study in the C-N Cross Coupling of Amines with Aryl Halides
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A Cu-(II) catalyzed N-formylation and N-acylation of amines with moderate to excellent yields, using N, N-dimethyl formamide (DMF) and N, N-dimethyl acetamide (DMA) as a formyl and acylating sources in the presence of 1,2,4-triazole is reported. This novel, highly efficient and simple protocol shows broad substrate scope for aliphatic, aromatic, and heterocyclic amines. In addition, the conditions to prevent N-formylation and N-acylation impurities in the C?N cross coupling of amines and aryl halides are described typically when DMF and DMA are used as solvents, with various catalysts, ligands, and bases.
- Sonawane, Rahul B.,Rasal, Nishant K.,Bhange, Dattatraya S.,Jagtap, Sangeeta V.
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p. 3907 - 3913
(2018/09/12)
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- Ni2B@Cu2O and Ni2B@CuCl2: two new simple and efficient nanocatalysts for?the green one-pot reductive acetylation of nitroarenes and direct N-acetylation of arylamines using solvent-free mechanochemical grinding
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Abstract: Ni2B@Cu2O and Ni2B@CuCl2 are introduced as simple and efficient earth-abundant transition-metal-based nanocomposites for the?green one-pot reductive acetylation of aromatic nitro compounds and direct N-acetylation of arylamines using a solvent-free mechanochemical grinding technique. The designed Ni2B-based nanocomposites were characterized by Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM) with energy-dispersive X-ray (EDX) spectroscopy. Notable advantages of these methods include broad substrate scope, use of a solvent-free mechanochemical grinding technique, implementation of earth-abundant transition-metal-based nanocomposites as simple and practical catalysts, and short reaction time and high yield at ambient condition. The mentioned methods can also be successfully applied for the?synthesis of a broad range of other amides (especially substituted acetamides) using green chemistry protocols. Also, the recoverability and reusability of the mentioned new nanocomposites were investigated. Graphical abstract: [Figure not available: see fulltext.].
- Zeynizadeh, Behzad,Younesi, Reza,Mousavi, Hossein
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p. 7331 - 7352
(2018/08/25)
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- Sulfated choline ionic liquid-catalyzed acetamide synthesis by grindstone method
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Sulfated choline ionic liquid (SCIL) has been found to be an efficient solid acid IL catalyst for the protection of amine groups with acetic anhydride under solvent-free grindstone conditions. The attractive features of this new catalytic methodology include its sustainability, facile work-up procedure, economic viability, and biodegradability. The SCIL catalyst was characterized using infrared spectroscopy, wide-angle X-ray scattering analysis, and scanning electron microscopy with energy dispersive X-ray spectroscopy. The catalyst could be reused six times without significant loss in activity. Furthermore, no chromatographic separations were needed to obtain the desired products.
- Kalla, Reddi Mohan Naidu,Lim, Jaehwa,Bae, Jaeyeong,Kim, Il
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supporting information
p. 1595 - 1599
(2017/04/03)
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- Co3O4 nanoparticles prepared by oxidative precipitation method: an efficient and reusable heterogeneous catalyst for N-formylation of amines
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Abstract: N-formylation of different amines was carried out with formic acid in the presence of the Co3O4 nanoparticles as an efficient, stable heterogeneous catalyst to give the corresponding formamides under solvent-free conditions. This method has advantages over the reported methods such as high yields, mild conditions, easy work-up and short reaction times. The catalyst was characterized by different techniques such as XRD, SEM and FT-IR spectroscopy. Graphical Abstract: [Figure not available: see fulltext.]
- Marjani, Ahmad Poursattar,Hosseini, Seyed Ali,Shokri, Zahra,Maleki, Nasim
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p. 413 - 422
(2017/01/14)
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- INHIBITORS OF RENAL OUTER MEDULLARY POTASSIUM CHANNEL
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Compounds of Formula I and the pharmaceutically acceptable salts thereof are provided as inhibitors of the ROMK (Kir1.1) channel. The compounds may be used as diuretic and/or natriuretic agents and for the therapy and prophylaxis of medical conditions including cardiovascular diseases such as hypertension, heart failure and chronic kidney disease and conditions associated with excessive salt and water retention.
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Page/Page column 56
(2016/02/05)
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- Synthesis and Herbicidal Activity of Triketone-Quinoline Hybrids as Novel 4-Hydroxyphenylpyruvate Dioxygenase Inhibitors
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4-Hydroxyphenylpyruvate dioxygenase (EC 1.13.11.27, HPPD) is one of the most important targets for herbicide discovery. In the search for new HPPD inhibitors with novel scaffolds, triketone-quinoline hybrids were designed and subsequently optimized on the basis of the structure-activity relationship (SAR) studies. Most of the synthesized compounds displayed potent inhibition of Arabidopsis thaliana HPPD (AtHPPD), and some of them exhibited broad-spectrum and promising herbicidal activity at the rate of 150 g ai/ha by postemergence application. Most promisingly, compound III-l, 3-hydroxy-2-(2-methoxy-7-(methylthio)quinoline-3-carbonyl)cyclohex-2-enone (Ki = 0.009 ~M, AtHPPD), had broader spectrum of weed control than mesotrione. Furthermore, compound III-l was much safer to maize at the rate of 150 g ai/ha than mesotrione, demonstrating its great potential as herbicide for weed control in maize fields. Therefore, triketone-quinoline hybrids may serve as new lead structures for novel herbicide discovery.
- Wang, Da-Wei,Lin, Hong-Yan,Cao, Run-Jie,Chen, Tao,Wu, Feng-Xu,Hao, Ge-Fei,Chen, Qiong,Yang, Wen-Chao,Yang, Guang-Fu
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p. 5587 - 5596
(2015/06/25)
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- Synthesis, characterization, theoretical, anti-bacterial and molecular docking studies of quinoline based chalcones as a DNA gyrase inhibitor
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A series of fourteen (A1-A14) new qunioline based chalcones were synthesized by condensing 2,7-dichloro-8-methyl-3-formyl quinoline with acetophenone and acetylthiophenes, and subsequently characterized by IR, NMR and Mass spectroscopy. All the compounds were screened for antibacterial activities and found potentially active antibacterial agents. Bioassay, theoretical and dockings studies with DNA gyrase (the enzyme required for super coiling of DNA of bacteria) results showed that the type and positions of the substituents seemed to be critical for their antibacterial activities. The bromo and chloro substituted chalcone displayed high anti-bacterial activity. The A4 and A6 showed high interaction with DNA gyrase, contributing high free binding energy (ΔG -8.18 and -8.88 kcal).
- Abdullah, Muhammad Imran,Mahmood, Asif,Madni, Murtaza,Masood, Sara,Kashif, Muhammad
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- PYRAZOLINE DERIVATIVES AND THEIR USE AS SELECTIVE ANDROGEN RECEPTOR MODULATORS
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The invention relates to a compound of formula (I) in free form or in pharmaceutically acceptable salt form (I), in which the substituents are as defined in the specification; to compounds of formula (I) for use as androgen receptor modulators. The present invention further provides a combination of pharmacologically active agents and a pharmaceutical composition.
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Paragraph 0429; 0430; 0431
(2014/11/13)
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- PYRAZOLINE DERIVATIVES AND THEIR USE AS SELECTIVE ANDROGEN RECEPTOR MODULATORS
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The invention relates to a compound of formula (I) in free form or in pharmaceutically acceptable salt form (I), in which the substituents are as defined in the specification; to compounds of formula (I) for use as androgen receptor modulators. The present invention further provides a combination of pharmacologically active agents and a pharmaceutical composition
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Page/Page column 45; 46
(2013/03/26)
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- Novel efficient routes to indoxyl glycosides for monitoring glycosidase activities
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A new efficient synthesis for broad access to indoxyl glycosides was developed. Indoxylic acid allyl ester linked to a sugar structure served as the key intermediate in this route. Selective ester cleavage and mild decarboxylation led to the corresponding indoxyl glycosides in good yields. This synthesis was applied for preparation of indoxyl glycosides of fucose, sialic acid, and 6′-sialyl lactose.
- Boettcher, Stephan,Hederos, Markus,Champion, Elise,Dekany, Gyula,Thiem, Joachim
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p. 3766 - 3769
(2013/08/23)
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- Discovery of potent and muscle selective androgen receptor modulators through scaffold modifications
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A novel series of imidazolin-2-ones were designed and synthesized as highly potent, orally active and muscle selective androgen receptor modulators (SARMs), with most of the compounds exhibiting low nM in vitro potency in androgen receptor (AR) binding and functional assays. Once daily oral treatment with the lead compound 11a (AR Ki = 0.9 nM, EC50 = 1.8 nM) for 14 days induced muscle growth with an ED50 of 0.09 mg/kg, providing approximately 50-fold selectivity over prostate growth in an orchidectomized rat model. Pharmacokinetic studies in rats demonstrated that the lead compound 11a had oral bioavailability of 65% and a plasma half-life of 5.5 h. On the basis of their preclinical profiles, the SARMs in this series are expected to provide beneficial anabolic effects on muscle with minimal androgenic effects on prostate tissue.
- Li, James J.,Sutton, James C.,Nirschl, Alexandra,Zou, Yan,Wang, Haixia,Sun, Chongqing,Pi, Zulan,Johnson, Rebecca,Krystek Jr., Stanley R.,Seethala, Ramakrishna,Golla, Rajasree,Sleph, Paul G.,Beehler, Blake C.,Grover, Gary J.,Fura, Aberra,Vyas, Viral P.,Li, Cindy Y.,Gougoutas, Jack Z.,Galella, Michael A.,Zahler, Robert,Ostrowski, Jacek,Hamann, Lawrence G.
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p. 3015 - 3025
(2008/02/06)
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- Novel bicyclic compounds as modulators of androgen receptor function and method
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The present invention relates to bicyclic compounds according to formula I, pharmaceutical compositions containing such compounds and methods of using such compounds in the treatment of androgen receptor-associated conditions, such as age-related diseases, for example sarcopenia, wherein R1, R2, R5, X and n are defined herein.
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Page/Page column 16
(2010/11/25)
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- Tandem optimization of target activity and elimination of mutagenic potential in a potent series of N-aryl bicyclic hydantoin-based selective androgen receptor modulators
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Pharmacokinetic studies in cynomolgus monkeys with a novel prototype selective androgen receptor modulator revealed trace amounts of an aniline fragment released through hydrolytic metabolism. This aniline fragment was determined to be mutagenic in an Ames assay. Subsequent concurrent optimization for target activity and avoidance of mutagenicity led to the identification of a pharmacologically superior clinical candidate without mutagenic potential.
- Hamann, Lawrence G.,Manfredi, Mark C.,Sun, Chongqing,Krystek Jr., Stanley R.,Huang, Yanting,Bi, Yingzhi,Augeri, David J.,Wang, Tammy,Zou, Yan,Betebenner, David. A.,Fura, Aberra,Seethala, Ramakrishna,Golla, Rajasree,Kuhns, Joyce E.,Lupisella, John A.,Darienzo, Celia J.,Custer, Laura L.,Price, Jennifer L.,Johnson, James M.,Biller, Scott A.,Zahler, Robert,Ostrowski, Jacek
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p. 1860 - 1864
(2008/02/04)
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- MONOCYCLIC N-ARYL HYDANTOIN MODULATORS OF ANDROGEN RECEPTOR FUNCTION
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The present invention relates to novel compounds useful in the treatment of androgen receptor associated conditions, such as age-related diseases, pharmaceutical compositions containing at least one of the compounds of the present invention and methods of treating a patient in need of therapy for an androgen receptor associated condition by administering a therapeutically effective amount of at least compound of the present invention.
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Page/Page column 42;43
(2010/02/12)
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- Novel bicyclic compounds as modulators of androgen receptor function and method
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The present invention relates to bicyclic compounds according to formula I, pharmaceutical compositions containing such compounds and methods of using such compounds in the treatment of androgen receptor-associated conditions, such as age-related diseases, for example sarcopenia, wherein R1, R2, R2′ R5, G, n and W are defined herein.
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Page/Page column 17
(2010/02/13)
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- Synthesis and antitumor evaluation of novel 5-substituted-4-hydroxy-8- nitroquinazolines as EGFR signaling-targeted inhibitors
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The synthesis and biological activity of a series of novel 5-substituted-4-hydroxy-8-nitroquinazolines that may function as inhibitors of EGFR- and/or ErbB-2-related oncogenic signaling are described. These compounds were prepared by SNAr reaction of 5-chloro-4-hydroxy-8- nitroquinazoline with alkyl or aryl amines, or alkyl alcohol as nucleophiles. Although the enzyme assay showed a weak inhibition effect against both EGFR and ErbB-2 tyrosine kinases, the cell-based antitumor activity turned out promising. Compounds having 5-anilino substituent exhibit high potency with 5-(4-methoxy)anilino-4-hydroxy-8-nitroquinazoline (1h) being the best dual EGFR/ErbB-2 inhibitors, which effectively inhibited the growth of both EGFR (MDA-MB-468, IC50 50 = 13 μM) overexpressing human tumor cell lines in vitro. More interestingly, the variation of the substituent(s) at the 3- and/or 4-position of the 5-anilino portion was found to modulate the selectivity and potency dramatically. However, compounds having an alkylamino or alkyloxy group at the 5-position of 4-hydroxy-8-nitroquinazolines are essentially inactive. These results are consistent with molecular modeling observations. This study was the first attempt to identify new structural types of dual EGFR/ErbB-2-related signaling inhibitors by incorporation of the anilino group at the 5-position of 4-hydroxy-8-nitroquinazolines' core structure, providing promising new templates for further development of potent inhibitors targeting both EGFR and ErbB-2 tyrosine kinases.
- Jin, Yi,Li, Hui-Yuan,Lin, Li-Ping,Tan, Jinzhi,Ding, Jian,Luo, Xiaomin,Long, Ya-Qiu
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p. 5613 - 5622
(2007/10/03)
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- Pd-catalyzed ortho-selective oxidative coupling of halogenated acetanilides with acrylates
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Coupling of different halogenated acetanilides with acrylates using Pd-catalyzed ortho-selective C-H bond activation is reported. The yields of coupled products are low to high depending on the substrate. In general, arenes with electron-rich substituents like methoxy and methyl groups gave higher yields of the coupled products. The presence of the halogen substituent did not interfere with the activation process under these conditions.
- Lee, George T.,Jiang, Xinglong,Prasad, Kapa,Repic, Oljan,Blacklock, Thomas J.
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p. 1921 - 1924
(2007/10/03)
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- N-Phenylpyrazole derivatives
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N-Phenylpyrazole derivatives of the formula: STR1 (wherein each of R5 and R6 represents a C1 -C4 alkyl or alkoxy radical, a trifluoromethyl, trifluoromethoxy, nitro, cyano or primary amino radical, or a fluorine, chlorine or bromine atom, each of R7, R8 and R9 represents a hydrogen atom, a C1 -C4 alkyl or alkoxy radical, a trifluoromethyl, trifluoromethoxy, nitro, cyano or primary amino radical or a fluorine, chlorine or bromine atom, or R5, R7, R8 and R9 each represents a hydrogen atom and R6 represents a trifluoromethoxy or trifluoromethyl radical, and R10 represents a cyano radical or substituted carbamoyl radical --CONHR11, wherein R11 represents a methyl or ethyl radical) have been found to possess useful herbicidal properties. All such N-phenylpyrazole derivatives with the exception of 5-amino-4-cyano-1-(2,4-dichlorophenyl)pyrazole and 5-amino-4-cyano-1-(4-chloro-2-methylphenyl)pyrazole are new compounds. Herbicidal compositions containing such N-phenylpyrazole derivatives are described and also processes for the preparation of the new compounds.
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- 4- and 5-Substituted 2,3-dihydro-1H-isoindoles, pharmaceutical compositions and method of inhibiting phenylethanolamine N-methyltransferase
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Pharmaceutical compositions and methods of inhibiting phenylethanolamine N-methyltransferase using novel 2,3-dihydro-1H-isoindole compounds having 4- and 5-substituents.
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