- Design, synthesis, and biological evaluation of 2-(phenoxyaryl)-3-urea derivatives as novel P2Y1 receptor antagonists
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A novel series of 2-(phenoxyaryl)-3-urea derivatives were designed, synthesized, and biologically evaluated for their anti-thrombotic activity. Most of compounds exhibited good inhibition against P2Y1 receptor. Among them, three compounds 11, 12, and 13 demonstrated good P2Y1 receptor antagonistic potency in vitro (IC50 = 0.62 μM, 0.82 μM, and 0.21 μM, respectively). In antiplatelet aggregation study, four compounds 2, 3, 9, and 13 showed good antiplatelet activity. The possible binding modes of compounds with P2Y1 receptor were also explored by molecular docking simulation. The docking studies demonstrated that compound 13 interacted well with Phe119 through hydrophobic interaction and modestly improved the P2Y1 receptor antagonistic activity, making it justifiable for further investigation.
- Peng, Jingjing,Zhao, Lifen,Wang, Lanlan,Chen, Hui,Qiu, Yunguang,Wang, Jiang,Yang, Huaiyu,Liu, Jun,Liu, Hong
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p. 302 - 310
(2018/09/18)
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- Optimization of potent inhibitors of P. falciparum dihydroorotate dehydrogenase for the treatment of malaria
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Inhibition of dihydroorotate dehydrogenase (DHODH) for P. falciparum potentially represents a new treatment option for malaria, since DHODH catalyzes the rate-limiting step in the pyrimidine biosynthetic pathway and P. falciparum is unable to salvage pyrimidines and must rely on de novo biosynthesis for survival. We report herein the synthesis and structure-activity relationship of a series of 5-(2-methylbenzimidazol-1-yl)-N-alkylthiophene-2-carboxamides that are potent inhibitors against PfDHODH but do not inhibit the human enzyme. On the basis of efficacy observed in three mouse models of malaria, acceptable safety pharmacology risk assessment and safety toxicology profile in rodents, lack of potential drug-drug interactions, acceptable ADME/pharmacokinetic profile, and projected human dose, 5-(4-cyano-2-methyl-1H-benzo[d]imidazol-1-yl) -N-cyclopropylthiophene-2-carboxamide 2q was identified as a potential drug development candidate.
- Skerlj, Renato T.,Bastos, Cecilia M.,Booker, Michael L.,Kramer, Martin L.,Barker, Robert H.,Celatka, Cassandra A.,O'Shea, Thomas J.,Munoz, Benito,Sidhu, Amar Bir,Cortese, Joseph F.,Wittlin, Sergio,Papastogiannidis, Petros,Angulo-Barturen, Inigo,Jimenez-Diaz, Maria Belen,Sybertz, Edmund
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supporting information; experimental part
p. 708 - 713
(2011/11/04)
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- ANTI-CANCER DRUGS AND USES RELATING THERETO FOR METASTATIC MALIGNANT MELANOMA AND OTHER CANCERS
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The present invention discloses triazene analogs of the general formula (I) and formula (II), their tautomeric forms, stereoisomers, polymorphs, hydrates, solvates, and pharmaceutically acceptable salts thereof for the metastatic malignant melanoma and other cancers including but not limited to lymphomas, sarcomas, carcinomas, and gliomas. The invention further discloses a process for the preparation of the above said triazene analogs of formula (I) and formula (II), and their pharmaceutically acceptable compositions.
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Page/Page column 38-39
(2010/04/06)
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- Novel compounds useful for bradykinin B1 receptor antagonism
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Disclosed are compounds that are bradykinin B1 receptor antagonists and are useful for treating diseases, or relieving adverse symptoms associated with disease conditions, in mammals mediated by bradykinin B1 receptor.
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Page/Page column 36
(2010/11/25)
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- NOVEL MUSCARINIC ACETYLCHOLINE RECEPTOR ANTAGONISTS
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Muscarinic Acetylcholine receptor antagonists and methods of using them are provided.
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Page/Page column 10
(2010/11/08)
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- 3-ALKYLIDENEHYDRAZINO SUBSTITUTED HETEROARYL COMPOUNDS AS THROMBOPOIETIN RECEPTOR ACTIVATORS
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A compound represented by the formula (1): wherein A is a nitrogen atom or CR4, B is an oxygen atom, a sulfur atom or NR9 (provided that when A is a nitrogen atom, B is not NH), R1 is a C2-14; aryl group, L1 is a bond, CR10R11, an oxygen atom, a sulfur atom or NR12, X is OR13, SR13 or NR14NR15, R2 is a hydrogen atom, a formyl group, a C1-10; alkyl group or the like, L2 is a bond or the like, L3 is a bond, CR17R18, an oxygen atom, a sulfur atom or NR19, L4 is a bond, CR20R21, an oxygen atom, a sulfur atom or NR22, Y is an oxygen atom, a sulfur atom or NR23, and R3 is a C2-14; aryl group, a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.
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Page 563-564
(2008/06/13)
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- 6H-THIENO`2, 3-B!PYRROLE DERIVATIVES AS ANTAGONISTS OF GONADOTROPIN RELEASING HORMONE (GNRH)
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The invention relates to a group of novel thieno-pyrrole compounds of Formula (I): wherein: R1, R2, R3, R4 and R5 are as defined in the specification, which are useful as gonadotrophin releasing hormone antagonists. The invention also relates to pharmaceutical formulations of said compounds, methods of treatment using said compounds and to processes for the preparation of said compounds.
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- Electrophilic tetraalkylammonium nitrate nitration. II. Improved anhydrous aromatic and heteroaromatic mononitration with tetramethylammonium nitrate and triflic anhydride, including selected microwave examples
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A new one-pot nitration employing tetramethylammonium nitrate and trifluoromethanesulfonic anhydride in dichloromethane to provide a ready source of the nitronium triflate nitrating agent is presented. Rapid and selective nitration with a variety of aromatic and heteroaromatic substrates is achieved resulting in the synthesis of several novel organic compounds. A distinct advantage is the removal of undesired byproducts by aqueous workup. This very mild nitration permits large-scale syntheses and gives high isolated product yields that often require no further purification. This tetramethylammonium nitrate-based nitration also has been applied to microwave-assisted conditions, and the results with several compounds are outlined.
- Shackelford, Scott A.,Anderson, Mark B.,Christie, Lance C.,Goetzen, Thomas,Guzman, Mark C.,Hananel, Martha A.,Kornreich, Wayne D.,Li, Haitao,Pathak, Ved P.,Rabinovich, Alex K.,Rajapakse, Ranjan J.,Truesdale, Larry K.,Tsank, Stella M.,Vazir, Haresh N.
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p. 267 - 275
(2007/10/03)
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- Toward an understanding of the chemical etiology for DNA minor-groove recognition by polyamides
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Crescent-shaped polyamides composed of aromatic amino acids, i.e., 1-methyl-1H-imidazole Im, 1-methyl-1H-pyrrole Py, and 3-hydroxy-1H-pyrrole Hp, bind in the minor groove of DNA as 2:1 and 1:1 ligand/DNA complexes. DNA-Sequence specificity can be attributed to shape-selective recognition and the unique corners or pairs of corners presented by each heterocycle(s) to the edges of the base pairs on the floor of the minor groove. Here we examine the relationship between heterocycle structure and DNA-sequence specificity for a family of five-membered aromatic amino acids. By means of quantitative DNase-I footprinting, the recognition behavior of polyamides containing eight different aromatic amino acids, i.e., 1-methyl-1H-pyrazole Pz, 1H-pyrrole Nh, 5-methylthiazole Nt, 4-methylthiazole Th, 3-methylthiophene Tn, thiophene Tp, 3-hydroxythiophene Ht, and furan Fr, were compared with the polyamides containing the parent-ring amino acids Py, Im, and Hp for their ability to discriminate between the four Watson - Crick base pairs in the DNA minor groove. Analysis of the data and molecular modeling showed that the geometry inherent to each heterocycle plays a significant role in the ability of polyamides to differentiate between DNA sequences. Binding appears sensitive to changes in curvature complementarity between the polyamide and DNA. The Tn/Py pair affords a modest 3-fold discrimination of T · A vs. A · T and suggests that an S-atom in the thiophene ring prefers to lie opposite T not A.
- Marques, Michael A.,Doss, Raymond M.,Urbach, Adam R.,Dervan, Peter B.
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p. 4485 - 4517
(2007/10/03)
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- Synthesis of highly potent and selective hetaryl ureas as integrin αVβ3-receptor antagonists
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Solid-phase synthesis and SAR of integrin αVβ3-receptor antagonists containing a urea moiety as non-basic guanidine mimetic are described. The most potent compounds exhibited IC50 values towards αVβ3 in the nanomolar range and high selectivity versus related integrins like αIIbβ3. For selected examples efficacy in functional cellular assays is demonstrated.
- Lange, Udo E.W.,Backfisch, Gisela,Delzer, Juergen,Geneste, Herve,Graef, Claudia,Hornberger, Wilfried,Kling, Andreas,Lauterbach, Arnulf,Subkowski, Thomas,Zechel, Christian
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p. 1379 - 1382
(2007/10/03)
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- Facile Conversions of Carboxylic Acids into Amides, Esters, and Thioesters Using 1,1'-Oxalyldiimidazole and 1,1'-Oxalyldi(1,2,4-triazole)
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Aliphatic, aromatic, and heteroaromatic carboxylic acids react with 1,1'-oxalyldiimidazole (1) or 1,1'-oxalyldi(1,2,4-triazole) (2) in acetonitrile for 40 min at 40 degC to give the corresponding 1-acylazole intermediates (11), which promptly undergo aminolysis and alcoholysis to form amides (13) including dipeptides (14), esters (16), and thioesters (19).These findings show that both 1 and 2 can be utilized as condensing reagents for the synthesis of carboxylic acid derivatives.Keywords --- 1,1'-oxalyldiimidazole; 1,1'-oxalyldi(1,2,4-triazole); 1,1'-carbonyldiimidazole; 1-acylazole; condensing reagent; amidation; esterification; dipeptide; aminolysis; alcoholysis
- Kitagawa, Tokujiro,Kuroda, Hiroko,Sasaki, Hideaki,Kawasaki, Koichi
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p. 4294 - 4301
(2007/10/02)
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- THE PREPARATION OF 2-(HETEROCYCLIC)THIENOPYRIDINE DERIVATIVES
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The preparation of a series of 2-(heterocyclic)-4-ethyl-4,7-dihydro-7-oxothienopyridine-6-carboxylic acids (5j-l) by aminolysis of the corresponding 2-bromo derivative (5i) is described.None of the compounds (5j-l) showed any interesting antibacterial activity.
- Elliot, Richard, L.,O'Hanlon, Peter J.,Rogers, Norman H.
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p. 3295 - 3302
(2007/10/02)
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- Factors controlling the Selectivity of ipso-Attack in Homolytic Aromatic Substitutions. Reactions of Alkyl Radicals with Nitrothiophen Derivatives
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The reactions of the nearly electroneutral methyl and of the nucleophilic 1-adamantyl radical with some selected nitrothiophen derivatives have been investigated in order to elucidate the factors which control the positional selectivity of radical addition to an aromatic substrate.With 5-nitro-2-X-thiophens (II), (V), and (VI) and 3,5-dinitro-2-methoxycarbonylthiophen (III) the adamantyl radical gave exclusively the products of ipso-attack, whereas the methyl radical selectively added at the unsubstituted 4-position.On the other hand, with 4-nitro-2-methoxycarbonylthiophen (I) both radicals added at the 5-position and with 4,5-dinitro-2-methoxycarbonylthiophen (IV) both radicals gave the products of ipso-substitution by displacing the nitro-group from the 5-position.These changes in positional selectivity are explained by assuming that the nature of the transition state of the addition step changes as a function of the polar character of the radical and of the electron deficiency of the aromatic substrates.
- Cogolli, Pietro,Maiolo, Filippo,Testaferri, Lorenzo,Tiecco, Marcello,Tingoli, Marco
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p. 1331 - 1335
(2007/10/02)
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- Process for preparing thiophene and furan derivatives
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A process for preparing methyl-nitrothenoate and methyl-nitrofuroate by oxidation of the corresponding aldehyde is described.
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