- Copper-Catalyzed C-H Fluorination/Functionalization Sequence Enabling Benzylic C-H Cross Coupling with Diverse Nucleophiles
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Site-selective transformation of benzylic C-H bonds into diverse functional groups is achieved via Cu-catalyzed C-H fluorination with N-fluorobenzenesulfonimide (NFSI), followed by substitution of the resulting fluoride with various nucleophiles. The benzyl fluorides generated in these reactions are reactive electrophiles in the presence of hydrogen-bond donors or Lewis acids, allowing them to be used without isolation in C-O, C-N, and C-C coupling reactions.
- Buss, Joshua A.,Golden, Dung L.,Stahl, Shannon S.,Vasilopoulos, Aristidis
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- Synthesis, biological evaluation, and molecular docking investigation of benzhydrol- and indole-based dual PPAR-γ/FFAR1 agonists
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Type-2 diabetes mellitus is a progressive cluster of metabolic disorders, representing a global public health burden affecting more than 366 million people worldwide. We recently reported the discovery of three series of novel agents showing balanced activity on two metabolic receptors, peroxisome proliferator activated receptor-γ (PPAR-γ) and free fatty acid receptor 1 (FFAR1), also known as GPCR40. Our designing strategy relied on linking the thiazolidinedione head with known GPCR privilege structures. To further investigate this concept, two new scaffolds, the benzhydrol- and indole-based chemotypes, were introduced here in. Our optimization campaign resulted in three compounds; 15a, 15c, and 15d, with affinities in the low micromolar range on both targets. In vivo study of selected test compounds, revealed that 15c possesses a significant anti-hyperglycemic and anti-hyperlipidemic activities superior to rosiglitazone in fat-fed animal models. Molecular docking analysis was conducted to explain the binding modes of both series. These compounds could lead to the development of the unique antidiabetic agent acting as insulin sensitizer as well as insulin secretagogue.
- Darwish, Khaled M.,Salama, Ismail,Mostafa, Samia,Gomaa, Mohamed S.,Khafagy, El-Sayed,Helal, Mohamed A.
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supporting information
p. 1595 - 1602
(2018/04/05)
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- Design, synthesis and pharmacological characterization of analogs of 2-aminoethyl diphenylborinate (2-APB), a known store-operated calcium channel blocker, for inhibition of TRPV6-mediated calcium transport
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2-Aminoethyl diphenylborinate (2-APB) is a known modulator of the IP 3 receptor, the calcium ATPase SERCA, the calcium release-activated calcium channel Orai and TRP channels. More recently, it was shown that 2-APB is an efficient inhibitor of the epithelial calcium channel TRPV6 which is overexpressed in prostate cancer. We have conducted a structure-activity relationship study of 2-APB congeners to understand their inhibitory mode of action on TRPV6. Whereas modifying the aminoethyl moiety did not significantly change TRPV6 inhibition, substitution of the phenyl rings of 2-APB did. Our data show that the diaryl borinate moiety is required for biological activity and that the substitution pattern of the aryl rings can influence TRPV6 versus SOCE inhibition. We have also discovered that 2-APB is hydrolyzed and transesterified within minutes in solution.
- Hofer, Alexandre,Kovacs, Gergely,Zappatini, Anna,Leuenberger, Michele,Hediger, Matthias A.,Lochner, Martin
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p. 3202 - 3213
(2013/07/11)
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- Identification of novel allosteric nonpeptidergic inhibitors of the human cytomegalovirus-encoded chemokine receptor US28
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Human cytomegalovirus (HCMV) is a widespread human pathogen, possessing onco-modulatory properties. Constitutive signaling of the HCMV-encoded chemokine receptor US28 and its ability to bind a broad spectrum of chemokines might facilitate HCMV-associated
- Vischer, Henry F.,Hulshof, Janneke W.,Hulscher, Saskia,Fratantoni, Silvina A.,Verheij, Mark H.P.,Victorina, Jane,Smit, Martine J.,de Esch, Iwan J.P.,Leurs, Rob
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scheme or table
p. 675 - 688
(2010/04/29)
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- OLIGOMER-ANTIHISTAMINE CONJUGATES
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The invention provides antihistamine drugs that are chemically modified by covalent attachment of a water-soluble oligomer. A conjugate of the invention, when administered by any of a number of administration routes, exhibits characteristics that are different from the characteristics of the antihistamine drug not attached to the water-soluble oligomer.
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Page/Page column 37-38
(2008/12/07)
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- Design, synthesis, and biological evaluation of novel non-piperazine analogues of 1-[2-(diphenylmethoxy)ethyl]- and 1-[2-[bis(4- fluorophenyl)methoxy]ethyl]-4-(3-phenylpropyl)piperazines as dopamine transporter inhibitors
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A series of novel diamine, amine-amide, and piperazinone analogues of N- [2-(bisarylmethoxy)-ethyl]-N'-(phenylpropyl)piperazines, GBR 12909 and 12935, were synthesized and evaluated as inhibitors of presynaptic monoamine neurotransmitter transporters. The primary objective of the study was to determine the structural requirements for selectivity of ligand binding and potency for neurotransmitter reuptake inhibition. In general, the target compounds retained transporter affinity; however, structural variations produced significant effects on reuptake inhibition and transporter selectivity. For example, analogues prepared by replacing the piperazine ring in the GBR structure with an N,N'-dimethylpropyldiamine moiety displayed enhanced selectivity for binding and reuptake inhibition at the norepinephrine (NE) transporter site (e.g. 4 and 5). Congeners in which the amide nitrogen atom was attached to the aralkyl moiety of the GBR molecule showed moderate affinity (K(i) = 51-61 nM) and selectivity for the dopamine transporter (DAT) site. In contrast, introduction of a carbonyl group adjacent to either nitrogen atom of the piperazine ring (e.g. 25 and 27) was not well tolerated. From the compounds prepared, analogue 16 was selected for further evaluation. With this congener, locomotor activity induced by cocaine at a dose of 20 mg/kg was attenuated with an-AD50 (dose attenuating cocaine-induced stimulation by 50%) of 60.0 ± 3.6 mg/kg.
- Choi, Sung-Woon,Elmaleh, David R.,Hanson, Robert N.,Fischman, Alan J.
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p. 3647 - 3656
(2007/10/03)
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- Substituted or unsubstituted benzhydryl heteroalkyl-substituted aminophenol compounds and pharmaceutical compositions thereof
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Aminophenol derivatives of the following formula (I) STR1 wherein X is hydrogen atom, lower alkyl or a protecting group for phenolic hydroxy, Y is hydrogen atom or lower alkyl, Z is hydrogen atom, lower alkyl, halogen atom or trifluoromethyl, A is hydrogen atom or lower alkyl, t is an integer of 1 to 5, l and m are respectively an integer of 2 to 4, E and W are nitrogen atoms, F is a direct bond or oxygen atom, P and Q are each hydrogen atom, halogen atom, lower alkyl or lower alkoxy, and R8 is hydrogen atom, hydroxy or a hydroxy-protecting group, and their pharmcologically acceptable salts. Since the aminophenol derivatives (I) of the present invention have excellent antioxidative action and antiinflammatory and antiallergic action in mammalian animals including human, they are extremely useful as pharmaceuticals such as an antiinflammatory or an antiallergic.
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- Structure-Activity Studies on Benzhydrol-Containing Nipecotic Acid and Guvacine Derivatives as Potent, Orally-Active Inhibitors of GABA Uptake
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The introduction of lipophilic groups onto the ring nitrogen of nipecotic acid and guvacine, two known GABA uptake inhibitors, afforded potent, orally-active anticonvulsant drugs.A series of compounds is reported which explores the structure-activity relationships (SAR) in this series.Among the areas explored: side-chain SAR (aromatic-, heterocyclic-, and tricyclic-containing side chains) and modifications to the tetrahydropyridine ring.The benzhydrol ether-containing side chains afforded the most potent compounds with several exhibiting in vitro IC50 values for GABA uptake of 1 μM (including 5, Table I; 37, 43, Table IV; and 44, Table V).Compound 44 was selected for extensive evaluation and subsequently progressed to Phase 1 clinical trials with severe adverse effects seen after single dose administration to humans.
- Pavia, Michael R.,Lobbestael, Sandra J.,Nugiel, David,Mayhugh, Daniel R.,Gregor, Vlad E.,et al.
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p. 4238 - 4248
(2007/10/02)
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- New Prenylamine analogues: synthesis and Ca2+-entry blocking activity
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The synthesis of a series of diphenylalkylamine derivatives related to prenylamine is reported.The amphetamine group in the prenylamine structure was replaced by other moieties.In addition to substitutions in the aromatic rings, heteroatoms such as sulphur and oxygen were introduced in the chain.The calcium-entry blocking activity was assayed in binding experiments on a guinea-pig brain membrane preparation by displacing -nitrendipine.
- Caldirola, PM,Goot, H van der,Timmerman, H
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p. 571 - 579
(2007/10/02)
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- (Diarylmethoxy alkyl)-1-pyrrolidines and piperidines having cardiovascular activity
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1-[(diarylmethoxy)alkyl]pyrrolidines and piperidines represented by the following formula: STR1 wherein X is hydrogen or a fluorine atom, Alk is a linear-chain or branched alkyl group having two or three carbon atoms; R 1 and R 2 are hydrogen or a linear-
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- SYNTHESE DE COORDINATS MACROCYCLIQUES POLYAZOTES COMPORTANT UNE FONCTION AMINE SECONDAIRE DISCRIMINEE
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A synthetic scheme is elaborated to prepare two polyaza-macrocycles in which one nitrogen atom is distinct from the others.Thus, (tri-N-methyl)-1,4,7,10-tetraazacyclododecane and (tetra-N-methyl)-1,4,7,10,13-pentaazacyclopentadecane were synthesised.Throu
- Pilichowski, J. F.,Lehn, J. M.,Sauvage, J. P.,Gramain, J. C.
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p. 1959 - 1964
(2007/10/02)
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