- Deconstructing Noncovalent Kelch-like ECH-Associated Protein 1 (Keap1) Inhibitors into Fragments to Reconstruct New Potent Compounds
-
Targeting the protein-protein interaction (PPI) between nuclear factor erythroid 2-related factor 2 (Nrf2) and Kelch-like ECH-associated protein 1 (Keap1) is a potential therapeutic strategy to control diseases involving oxidative stress. Here, six classes of known small-molecule Keap1-Nrf2 PPI inhibitors were dissected into 77 fragments in a fragment-based deconstruction reconstruction (FBDR) study and tested in four orthogonal assays. This gave 17 fragment hits of which six were shown by X-ray crystallography to bind in the Keap1 Kelch binding pocket. Two hits were merged into compound 8 with a 220-380-fold stronger affinity (Ki = 16 μM) relative to the parent fragments. Systematic optimization resulted in several novel analogues with Ki values of 0.04-0.5 μM, binding modes determined by X-ray crystallography, and enhanced microsomal stability. This demonstrates how FBDR can be used to find new fragment hits, elucidate important ligand-protein interactions, and identify new potent inhibitors of the Keap1-Nrf2 PPI.
- Pallesen, Jakob S.,Narayanan, Dilip,Tran, Kim T.,Solbak, Sara M. ?.,Marseglia, Giuseppe,S?rensen, Louis M. E.,H?j, Lars J.,Munafò, Federico,Carmona, Rosa M. C.,Garcia, Anthony D.,Desu, Haritha L.,Brambilla, Roberta,Johansen, Tommy N.,Popowicz, Grzegorz M.,Sattler, Michael,Gajhede, Michael,Bach, Anders
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p. 4623 - 4661
(2021/05/07)
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- Probing 2H-Indazoles as Templates for SGK1, Tie2, and SRC Kinase Inhibitors
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The broader and systematic application of a novel scaffold is often hampered by the unavailability of a short and reliable synthetic access. We investigated a new strategy for the design and synthesis of an array of N2-substituted aza-2H-indazole derivatives as potential kinase inhibitors. Guided by a rational ligand alignment approach to qualify the so-far underrepresented aza-2H-indazole scaffold, indazoles were connected at the N2 position with a phenyl spacer and an arylsulfonamide or amide linkage. Initial profiling against a panel of 30 kinases confirmed the in silico predicted selectivity bias. A synthesized focused library of 52 different aza-2H-indazole derivatives showed good initial selective inhibition against SGK1, Tie2, and SRC kinases, with the best representatives having IC50 values in the range of 500 nm. In a comparative computational study, these data were analyzed and rationalized in light of docking studies.
- Schoene, Jens,Gazzi, Thais,Lindemann, Peter,Christmann, Mathias,Volkamer, Andrea,Nazaré, Marc
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p. 1514 - 1527
(2019/08/07)
-
- Visible-Light-Mediated Nitration of Protected Anilines
-
The photocatalytic nitration of protected anilines proceeds with riboflavin tetraacetate as an organic photoredox catalyst. Sodium nitrite serves as the NO2 source in this visible-light-driven room temperature reaction. Various nitroanilines are obtained in moderate to good yields without the addition of acid or stoichiometric oxidation agents. The catalytic cycle is closed by aerial oxygen as the terminal oxidant.
- Düsel, Simon J. S.,K?nig, Burkhard
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p. 2802 - 2807
(2018/03/09)
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- Soft-Hard Acid/Base-Controlled, Oxidative, N-Selective Arylation of Sulfonanilides via a Nitrenium Ion
-
In iodine(III)-catalyzed, dehydrogenative arylations of sulfonanilides, the functionalization of C-C bonds is preferred over the functionalization of C-N bonds. Herein, an unprecedented N-selective arylation of sulfonanilides using soft-hard acid-base (SHAB) control by a nitrenium ion over a carbenium ion is reported. Treatment of sulfonanilides with iodine(III) led to the formation of nitrenium ions (soft), which preferentially react with biphenyls (soft) over bimesityl (hard) to generate C-N bonds. The iodine(III) was generated in situ by using PhI and mCPBA at room temperature.
- Maiti, Saikat,Mal, Prasenjit
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p. 1340 - 1347
(2018/02/09)
-
- Amide compound for prevention and treatment of mental disorders
-
The present invention relates to an amide compound for prevention and treatment of mental disorders, which is shown as a formula (I), a pharmaceutically acceptable salt thereof, a prodrug thereof, a solvate thereof, a deuterated substance or a stereoisomer thereof. Wherein R1, R2, R3, R4, R5, Ar1, Ar2, p and q are as defined in the specification. The invention also relates to a preparation methodof the amide compound, a pharmaceutical composition and a pharmaceutical preparation containing the amide compound, and an application of the compound in preparation of a drug for prevention or treatment of mental disorders such as depression, depression and anxiety, and schizophrenia.
- -
-
Paragraph 0150; 0152; 0153
(2019/01/08)
-
- Discovery and Structure-Based Optimization of 2-Ureidothiophene-3-carboxylic Acids as Dual Bacterial RNA Polymerase and Viral Reverse Transcriptase Inhibitors
-
We are concerned with the development of novel anti-infectives with dual antibacterial and antiretroviral activities for MRSA/HIV-1 co-infection. To achieve this goal, we exploited for the first time the mechanistic function similarity between the bacterial RNA polymerase (RNAP) "switch region" and the viral non-nucleoside reverse transcriptase inhibitor (NNRTI) binding site. Starting from our previously discovered RNAP inhibitors, we managed to develop potent RT inhibitors effective against several resistant HIV-1 strains with maintained or enhanced RNAP inhibitory properties following a structure-based design approach. A quantitative structure-activity relationship (QSAR) analysis revealed distinct molecular features necessary for RT inhibition. Furthermore, mode of action (MoA) studies revealed that these compounds inhibit RT noncompetitively, through a new mechanism via closing of the RT clamp. In addition, the novel RNAP/RT inhibitors are characterized by a potent antibacterial activity against S. aureus and in cellulo antiretroviral activity against NNRTI-resistant strains. In HeLa and HEK 293 cells, the compounds showed only marginal cytotoxicity.
- Elgaher, Walid A. M.,Sharma, Kamal K.,Haupenthal, J?rg,Saladini, Francesco,Pires, Manuel,Real, Eleonore,Mély, Yves,Hartmann, Rolf W.
-
supporting information
p. 7212 - 7222
(2016/08/24)
-
- Photochemistry of N-Arylsulfonimides: An Easily Available Class of Nonionic Photoacid Generators (PAGs)
-
The photochemical behavior of differently substituted N-arylsulfonimides was investigated. Homolysis of the S?N bond took place as the exclusive path from the singlet state to afford both N-arylsulfonamides and photo-Fries adducts, the amount of which depended on reaction conditions and aromatic substituents. Sulfinic and sulfonic acids were released upon irradiation under deaerated and oxygenated conditions, respectively. The nature of the excited states and intermediates involved were proved by laser flash photolysis and EPR experiments. These results highlighted the potential of such compounds as nonionic photoacid generators able to photorelease up to two equivalents of a strong acid for each mole of substrate.
- Torti, Edoardo,Protti, Stefano,Merli, Daniele,Dondi, Daniele,Fagnoni, Maurizio
-
supporting information
p. 16998 - 17005
(2016/11/16)
-
- HEPARAN SULFATE BIOSYNTHESIS INHIBITORS FOR THE TREATMENT OF DISEASES
-
Described herein are compounds of Formula I, methods of making such compounds, pharmaceutical compositions and medicaments containing such compounds, and methods of using such compounds to treat or prevent diseases or conditions in need of inhibition of heparan sulfate biosynthesis.
- -
-
Paragraph 000789
(2016/05/02)
-
- Pyrrole inhibitors of S-nitrosoglutathione reductase as therapeutic agents
-
The present invention is directed to inhibitors of S-nitrosoglutathione reductase (GSNOR), pharmaceutical compositions comprising such GSNOR inhibitors, and methods of making and using the same.
- -
-
Page/Page column 299
(2015/11/16)
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- Novel, potent, selective and cellular active ABC type PTP1B inhibitors containing (methanesulfonyl-phenyl-amino)-acetic acid methyl ester phosphotyrosine mimetic
-
Protein tyrosine phosphatase 1B (PTP1B) which plays an important role in the negative regulation of insulin and leptin pathway has emerged as a novel promising therapeutic target for the treatment of type 2 diabetes mellitus and obesity. Upon careful study, a series of novel scaffold and simple synthesis method inhibitors were discovered based on the analysis of X-ray crystal structures of PTP1B/inhibitor complexes and docking simulations. Among them, compound P7 exhibited high inhibitory activity (IC50 = 222 nM) with moderate selectivity (8-fold) over T-cell PTPase (TCPTP) through interacting with the A, B and C binding sites of PTP1B enzyme. Further studies on cellular activities revealed that compound P7 could enhance insulin-mediated IRβ phosphorylation and insulin-stimulated glucose uptake.
- Liu, Peihong,Du, Yongli,Song, Lianhua,Shen, Jingkang,Li, Qunyi
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p. 7079 - 7088
(2015/11/11)
-
- Mild hypervalent iodine mediated oxidative nitration of N-aryl sulfonamides
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An oxidative and acid-free method for the nitration of N-aryl sulfonamides has been developed using a combination of sodium nitrite as cheap and easy to handle NO2-source and the hypervalent iodine reagent PIFA as stoichiometric oxidant. Under
- Kloeckner, Ulrich,Nachtsheim, Boris J.
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p. 10485 - 10487
(2014/09/29)
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- Palladium-catalyzed regiocontrolled domino synthesis of N-sulfonyl dihydrophenanthridines and dihydrodibenzo[c, e]azepines: Control over the formation of biaryl sultams in the intramolecular direct arylation
-
A palladium-catalyzed domino N-benzylation/intramolecular direct arylation involving sulfonanilides and 2-bromobenzyl bromides has been developed for the first time, providing a workable access to N-sulfonyl dihydrophenanthridines in good to excellent yields. Under the optimized conditions, the formation of 5,6-dihydrophenanthridines was largely controlled over the formation of biaryl sultams containing a seven member ring. The optimized condition was found extendable to the regiocontrolled domino formation of N-sulfonyl-6,7-dihydro-5H-dibenzo[c,e]azepines over the biaryl sultam formation. Using an appropriate substrate, a biaryl sultam has been obtained exclusively.
- Laha, Joydev K.,Dayal, Neetu,Jain, Roli,Patel, Ketul
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p. 10899 - 10907
(2015/01/08)
-
- Chemoselective nitration of aromatic sulfonamides with tert-butyl nitrite
-
A methodology for the efficient conversion of aromatic sulfonamides into their mono-nitro derivatives using tert-butyl nitrite is reported. The reaction exhibits a high degree of chemoselectivity for sulfonamide functionalized aryl systems, even in the presence of other sensitive or potentially reactive functionalities.
- Kilpatrick, Brenden,Heller, Markus,Arns, Steve
-
p. 514 - 516
(2013/02/25)
-
- SUBSTITUTED TRICYCLIC COMPOUNDS WITH ACTIVITY TOWARDS EP1 RECEPTORS
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The present invention belongs to the field of EP1 receptor ligands. More specifically it refers to compounds of general formula (I) having great affinity and selectivity for the EP1 receptor. The invention also refers to the process for their preparation, to their use as medicament for the treatment and/or prophylaxis of diseases or disorders mediated by the EP1 receptor as well as to pharmaceutical compositions comprising them.
- -
-
Page/Page column 44; 45
(2013/10/22)
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- Ionic liquid-supported synthesis of sulfonamides and carboxamides
-
An ionic liquid-supported aldehyde was designed and converted to ionic liquid-supported secondary aryl amines through reductive amination. The reaction of ionic liquid-supported aryl amines with sulfonyl chlorides and acid chlorides, respectively, followed by cleavage using trifluoroacetic acid (TFA) afforded sulfonamides and caboxamides. To introduce additional diversity in the synthesis of sulfonamides and caboxamides, ionic liquid-supported iodosubstituted aryl amine was synthesized using the same strategy, and underwent Suzuki coupling reaction, followed by reaction with a methanesulfonyl chloride to generate the corresponding biaryl sulfonamide. The advantages of the protocol over solid-phase synthesis are homogeneous reaction medium, high loading, easy separation of products, and characterization of intermediates.
- Muthayala, Manoj Kumar,Chhikara, Bhupender S.,Parang, Keykavous,Kumar, Anil
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experimental part
p. 60 - 65
(2012/02/04)
-
- Structure-activity relationship of pyrrole based S-nitrosoglutathione reductase inhibitors: Carboxamide modification
-
The enzyme S-nitrosoglutathione reductase (GSNOR) is a member of the alcohol dehydrogenase family (ADH) that regulates the levels of S-nitrosothiols (SNOs) through catabolism of S-nitrosoglutathione (GSNO). GSNO and SNOs are implicated in the pathogenesis of many diseases including those in respiratory, gastrointestinal, and cardiovascular systems. The pyrrole based N6022 was recently identified as a potent, selective, reversible, and efficacious GSNOR inhibitor which is currently in clinical development for acute asthma. We describe here the synthesis and structure-activity relationships (SAR) of novel pyrrole based analogs of N6022 focusing on carboxamide modifications on the pendant N-phenyl moiety. We have identified potent and novel GSNOR inhibitors that demonstrate efficacy in an ovalbumin (OVA) induced asthma model in mice.
- Sun, Xicheng,Qiu, Jian,Strong, Sarah A.,Green, Louis S.,Wasley, Jan W.F.,Blonder, Joan P.,Colagiovanni, Dorothy B.,Stout, Adam M.,Mutka, Sarah C.,Richards, Jane P.,Rosenthal, Gary J.
-
supporting information; experimental part
p. 2338 - 2342
(2012/04/18)
-
- Convenient synthesis of primary sulfonamides
-
An efficient protocol for a one-pot synthesis of mono-sulfonamides has been developed. It features utilization of excess of sulfonylating agent followed by base mediated recovery of the primary sulfonamide.
- Greenfield, Alexander,Grosanu, Cristina
-
body text
p. 6300 - 6303
(2009/04/06)
-
- Efficient large-scale synthesis of 2-amino-5- methanesulfonylaminobenzenesulfonamide
-
A novel synthesis of 2-amino-5-methanesulfonylaminobenzenesulfonamide is described. This preparation begins with readily available 4-nitroaniline and proceeds through five steps (isolations) in 41% overall yield. The described chemistry is conducted on a 50- to 100-g scale and does not require extractive workup procedures or chromatographic purifications. Copyright Taylor & Francis Group, LLC.
- Dragovich, Peter S.,Murphy, Douglas E.,Tran, Chinh V.,Ruebsam, Frank
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p. 1909 - 1916
(2008/09/20)
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- 5,6-DIHYDRO-1H-PYRIDIN-2-ONE COMPOUNDS
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The invention is directed to 5,6-dihydro-1H-pyridin-2-one compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
- -
-
Page/Page column 65-66
(2008/12/06)
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- PYRIDAZINONE COMPOUNDS
-
The invention is directed to pyridazinone compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
- -
-
Page/Page column 168
(2008/12/07)
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- PYRIDAZINONE COMPOUNDS
-
The invention is directed to pyridazinone compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
- -
-
Page/Page column 23-24
(2008/12/07)
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- PYRRO[1,2-B]PYRIDAZINONE COMPOUNDS
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The invention is directed to pyrro[l,2-b]pyridazinone compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
- -
-
Page/Page column 48; 70
(2008/06/13)
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- Analysis of structure-activity relationships for the 'A-region' of N-(4-t-butylbenzyl)-N′-[4-(methylsulfonylamino)benzyl]thiourea analogues as TRPV1 antagonists
-
The structure-activity relationships for the 'A-region' of N-(4-t-butylbenzyl)-N′-[4-(methylsulfonylamino)benzyl]thiourea analogues have been investigated as TRPV1 receptor antagonists. The 2-halogen analogues showed enhanced antagonism compared to the prototype antagonist.
- Lee, Jeewoo,Kang, Sang-Uk,Kil, Min-Jung,Shin, Myoungyoup,Lim, Ju-Ok,Choi, Hyun-Kyung,Jin, Mi-Kyoung,Kim, Su Yeon,Kim, Sung-Eun,Lee, Yong-Sil,Min, Kyung-Hoon,Kim, Young-Ho,Ha, Hee-Jin,Tran, Richard,Welter, Jacqueline D.,Wang, Yun,Szabo, Tamas,Pearce, Larry V.,Lundberg, Daniel J.,Toth, Attila,Pavlyukovets, Vladimir A.,Morgan, Matthew A.,Blumberg, Peter M.
-
p. 4136 - 4142
(2007/10/03)
-
- NOVEL AMIDE COMPOUNDS WITH MCH ANTAGONISTIC EFFECT AND MEDICAMENTS COMPRISING SAID COMPOUNDS
-
The invention relates to amide compounds of general formula (I), in which the groups and residues A, B, b, W, X, Y, Z, R1, R2 and R3 have the meanings given in claim 1. The invention further relates to medicaments comprising at least one of said amides. Said medicaments are suitable for the treatment of metabolic disorders and/or eating disorders, in particular, obesity, bulimia, anorexia, hyperphagia, and diabetes as a result of the MCH receptor antagonism.
- -
-
Page/Page column 97-98
(2008/06/13)
-
- Analysis of structure-activity relationships with the N-(3-acyloxy-2- benzylpropyl)-N′-[4-(methylsulfonylamino)benzyl]thiourea template for vanilloid receptor 1 antagonism
-
In a continuing effort to elucidate the structure-activity relationships of the lead antagonist N-[2-(3,4-dimethylbenzyl)-3-pivaloyloxypropyl]-N ′-[4-(methylsulfonylamino)benzyl]thiourea (1), the distances between the proposed four pharmacophores in 1 have been varied by insertion or deletion of one carbon to optimize their fit to the receptor. In addition, the acyloxy group of the C region was replaced with amide and N-hydroxy amide to identify the pharmacophoric importance of the ester group in the C2 region. The results indicated that the pharmacophoric arrangement of 1 was optimal for receptor binding affinity and antagonism, and the ester of the C2 region was significant for receptor binding. Among the derivatives, compound 19 showed distinct behavior with a 2-fold improvement in antagonism but a 13-fold reduction in binding affinity compared to 1. The partial separation of pharmacophoric requirements of these two assays has been noted before and compound 19 is thus selective for the calcium entry-linked receptor population. The conformational analysis of 1 generated three distinct conformers having different types of hydrophobic interactions, which will be utilized for exploring the active conformation of the VR1 ligand.
- Lee, Jeewoo,Kim, Su Yeon,Lee, Jiyoun,Kang, Myungsim,Kil, Min-Jung,Choi, Hyun-Kyung,Jin, Mi-Kyung,Wang, Yun,Toth, Attila,Pearce, Larry V.,Lundberg, Daniel J.,Tran, Richard,Blumberg, Peter M.
-
p. 3411 - 3420
(2007/10/03)
-
- A practical route to quinolines from anilines
-
A practical route to quinoline from anilines through acid-mediated cyclization of 3-(N-aryl-N-sulfonylamino)propionaldehydes has been developed. Treatment of the cyclization products, dihydroquinoline intermediates with KOH in DMSO leads to substituted quinolines.
- Tokuyama, Hidetoshi,Sato, Masashi,Ueda, Toshihiro,Fukuyama, Tohru
-
p. 105 - 108
(2007/10/03)
-
- 1H-benzotriazol-1-yl methanesulfonate: A regioselective N-mesylating reagent
-
1H-Benzotriazol-1-yl methanesulfonate has been found to be an effective reagent in selective mesylation for differentiating amine groups from one another. In a molecule with both primary and secondary amine groups, mesylation only occurred at the primary amine group. When a compound contains both amine and hydroxy groups, the reagent selectively mesylated at the amine groups.
- Kim, Sun Young,Sung, Nack-Do,Choi, Joong-Kwon,Kim, Sung Soo
-
p. 117 - 120
(2007/10/03)
-
- SYNTHESIS AND BIOLOGICAL ACTIVITY OF NOVEL N-1-ARYL-6-FLUORO-5-METHYL-1,8-NAPHTHYRIDINE-3-CARBOXYLIC ACIDS
-
A series of 5-methyl-4-oxo-1,8-naphthyridine-3-carboxylic acids was prepared in which the N-1 position was substituted by various aryl groups.Seven compounds showed excellent in vitro antibacterial activity against Gram-positive and Gram-negative strains.
- Jacquet, Jean-Pierre,Bouzard, Daniel,Cesare, Pierre Di,Dolnic, Nicolas,Massoudi, Massoud,Remuzon, Philippe
-
p. 2301 - 2311
(2007/10/02)
-
- QUINONE-IMIDES : REGIOSPECIFICITY OF NUCLEOPHILIC ATTACK ON N-ALKANESULPHONYL-N'-ALKANOYL 1,4-BENZOQUINONE-IMINES.
-
Substrates such as (2) undergo regiospecific attack by azide and thiocyanate ions at the terminus of the C=C-C=N-CO system.In the case of addition of azide, this is proved by the detailed analysis of the 1H and 13C NMR spectra of the products (11) derived from the quinone-imides (8).The structure of the products obtained by the addition of thiocyanate to the quinone-imides (10) and (20) is proved by their facile cyclisation to the 2-aminobenzothiazoles (18) and (21) respectively.
- Rajappa, Srinivasaschari,Shenoy, Sharada J.
-
p. 5739 - 5746
(2007/10/02)
-
- Substituent effects in infrared spectroscopy-VII. Meta and para substituted methanesulphonanilides
-
Substituent effects on the NH frequencies of the conformers of methanesulphonanilides, their cyclic dimers and their hydrogen bonded complexes with acetonitrile have been analysed by means of the Hammet equation.An electron-withdrawing substituent may either increase or decrease ν(NH) in the XC6H4NHY series according to the electronic nature of the Y group.This can be explained by the non-monotonic dependence of the NH stretching frequency on the ionic character of the NH bond.
- Laurence, C.,Berthelot, M.,Lucon, M.,Tsuno, Y.
-
p. 791 - 796
(2007/10/02)
-