- The discovery of a potent and selective pyrazolo-[2,3-e]-[1,2,4]-triazine cannabinoid type 2 receptor agonist
-
The development of selective CB2 receptor agonists is a promising therapeutic approach for the treatment of inflammatory diseases, without CB1 receptor mediated psychoactive side effects. Preliminary structure-activity relationship studies on pyrazoylidene benzamide agonists revealed the -ylidene benzamide moiety was crucial for functional activity at the CB2 receptor. A small library of compounds with varying linkage moieties between the pyrazole and substituted phenyl group has culminated in the discovery of a potent and selective pyrazolo-[2,3-e]-[1,2,4]-triazine agonist 19 (CB2R EC50 = 19 nM, CB1R EC50 > 10 μM). Docking studies have revealed key structural features of the linkage group that are important for potent functional activity.
- Moir, Michael,Lane, Samuel,Montgomery, Andrew P.,Hibbs, David,Connor, Mark,Kassiou, Michael
-
-
- The First Example of Azole-Fused Cyclic Anhydride Reacting in the Castagnoli-Cushman Way
-
Pyrazole-fused cyclic anhydrides have been employed for the first time as the Castagnoli-Cushman reaction partners to produce hitherto unknown 4-oxo-4,5,6,7-tetrahydropyrazolo[1,5- a ]pyrazine-7-carboxylates in remarkably convenient and speedy fashion. At
- Moreau, Ella,Dar'In, Dmitry,Krasavin, Mikhail
-
supporting information
p. 890 - 893
(2018/03/06)
-
- Pyrazole C-region analogues of 2-(3-fluoro-4-methylsulfonylaminophenyl)propanamides as potent TRPV1 antagonists
-
A series of 1-substituted 3-(t-butyl/trifluoromethyl)pyrazole C-region analogues of 2-(3-fluoro-4-methylsulfonamidophenyl)propanamides were investigated for hTRPV1 antagonism. The structure activity relationship indicated that the 3-chlorophenyl group at the 1-position of pyrazole was the optimized hydrophobic group for antagonistic potency and the activity was stereospecific to the S-configuration, providing exceptionally potent antagonists 13S and 16S with Ki(CAP) = 0.1 nM. Particularly significant, 13S exhibited antagonism selective for capsaicin and NADA and not for low pH or elevated temperature. Both compounds also proved to be very potent antagonists for rTRPV1, blocking in vivo the hypothermic action of capsaicin, consistent with their in vitro mechanism. The docking study of compounds 13S and 16S in our hTRPV1 homology model indicated that the binding modes differed somewhat, with that of 13S more closely resembling that of GRT12360.
- Lee, Sunho,Kim, Changhoon,Ann, Jihyae,Thorat, Shivaji A.,Kim, Eunhye,Park, Jongmi,Choi, Sun,Blumberg, Peter M.,Frank-Foltyn, Robert,Bahrenberg, Gregor,Stockhausen, Hannelore,Christoph, Thomas,Lee, Jeewoo
-
p. 4383 - 4388
(2017/09/12)
-
- Design, synthesis and biological activity of novel substituted pyrazole amide derivatives targeting EcR/USP receptor
-
In order to discover highly active ecdysone analogs, a series of new substituted pyrazole amide derivatives were obtained using structure-guided optimization method and further screened for their insecticidal activities, in the basis of the core structures of the two active compounds N-(3-methoxyphenyl)-3-(tert-butyl)-1-phenyl-1H-pyrazole-5-carboxamide (6e) and N-(4-(tert-butyl)phenyl)-3-(tert-butyl)-1-phenyl-1H-pyrazole-5-carboxamide (6i), previously presented by us. The chemical structures of the title compounds were identified by spectral analyses. The preliminary bioassay results indicated that one among the synthesized pyrazole derivatives, compound 34, endowed with good activity against Mythimna Separata at 10 mg/L, which was equal to that displayed by the positive control tebufenozide. In addition, examples of molecular docking and molecular dynamics studies demonstrated that 34 may be the potential inhibitor to EcR and its docking conformation was similar to that of tebufenozide. In addition, increasing the hydrophobic effect and considering the suitable bulk effect on pyrazole ring are beneficial to the inhibiting activity to EcR and activity in vivo.
- Deng, Xi-Le,Xie, Jin,Li, Yong-Qiang,Yuan, De-Kai,Hu, Xue-Ping,Zhang, Li,Wang, Qing-Min,Chi, Ming,Yang, Xin-Ling
-
supporting information
p. 566 - 570
(2016/04/26)
-
- Target-based design, synthesis and biological activity of new pyrazole amide derivatives
-
Based on the similarities in the conformation of VS008 (N-(4-methylphenyl)-3-(tert-butyl)-1-(phenylmethyl)-1H-pyrazole-5-carboxamide) and BYIO6830 (N′-(3,5-dimethylbenzoyl)-N′-tert-butyl-5-methyl-2,3-dihydro-1,4-benzodioxine-6-carbohydrazide) bound to the active site of the EcR subunit of the ecdysone receptor (EcR)-ultraspiracle protein (USP) heterodimeric receptor, a series of new pyrazole amide derivatives were designed and synthesized. Their structures were confirmed by IR, 1HNMR, 13C NMR and elemental analysis. Results from a preliminary bioassay revealed that two of the pyrazole derivatives exhibited promising insecticidal activity. Specifically, compounds 6e and 6i exhibited good activity against Helicoverpa armigera (cotton bollworm) at low concentration. Symptoms displayed by tebufenozide-treated H. armigera were identical with those displayed by its treated counterpart. 6i showed the same poisoning symptoms as those of tebufenozide. In addition, results from molecular docking result indicated that the binding modes of 6e and 6i at the active site of the EcR subunit of the heterodimeric receptor were similar to that of the bound tebufenozide.
- Deng, Xi-Le,Zhang, Li,Hu, Xue-Ping,Yin, Bin,Liang, Pei,Yang, Xin-Ling
-
p. 251 - 255
(2018/03/22)
-
- Synthesis of 3-(1,2-dioxoethyl)- and 2,3-dicarbonyl-containing pyrroles
-
The transition metal-catalyzed reaction of 2H-azirines with 1,2,4-tricarbonyl compounds leads to 3-(1,2-dioxoethyl)- and 2,3-dicarbonyl-pyrrole derivatives, useful building blocks for the preparation of 3-heterocyclyl pyrroles and pyrroles fused with heterocycles. The influence of catalysts and the reaction conditions on the yields of pyrroles and the regioselectivity of the reaction were studied. Experimental and theoretical results suggest that the reaction proceeds via the formation of an intermediate azirine-metal complex and subsequent nucleophilic N-C3 bond cleavage.
- Galenko, Alexey V.,Khlebnikov, Alexander F.,Novikov, Mikhail S.,Avdontceva, Margarita S.
-
p. 1940 - 1951
(2015/03/30)
-
- NOVEL COMPOUNDS USEFUL FOR THE TREATMENT OF DEGENERATIVE and INFLAMMATORY DISEASES
-
The present invention relates to compounds that are inhibitors of PDElA, a phosphodiesterase that is involved in the modulation of the degradation of cartilage, joint degeneration and diseases involving such degradation and/or inflammation, and particular
- -
-
Page/Page column 43
(2009/07/17)
-
- PYRAZOLEPYRIMIDINE COMPOUNDS USEFUL FOR THE TREATMENT OF DEGENERATIVE and INFLAMMATORY DISEASES
-
The present invention relates to compounds that are inhibitors of PDElA, a phosphodiesterase that is involved in the modulation of the degradation of cartilage, joint degeneration and diseases involving such degradation and/or inflammation, and particular
- -
-
Page/Page column 43
(2009/07/17)
-
- Novel compounds useful for the treatment of degenerative and inflammatory diseases
-
The present invention relates to compounds that are inhibitors of PDE1A, a phosphodiesterase that is involved in the modulation of the degradation of cartilage, joint degeneration and diseases involving such degradation and/or inflammation.
- -
-
Page/Page column 24
(2008/12/07)
-
- Agonist lead identification for the high affinity niacin receptor GPR109a
-
A strategy for lead identification of new agonists of GPR109a, starting from known compounds shown to activate the receptor, is described. Early compound triage led to the formulation of a binding hypothesis and eventually to our focus on a series of pyrazole acid derivatives. Further elaboration of these compounds provided a series of 5,5-fused pyrazoles to be used as lead compounds for further optimization.
- Gharbaoui, Tawfik,Skinner, Philip J.,Shin, Young-Jun,Averbuj, Claudia,Jung, Jae-Kyu,Johnson, Benjamin R.,Duong, Tracy,Decaire, Marc,Uy, Jane,Cherrier, Martin C.,Webb, Peter J.,Tamura, Susan Y.,Zou, Ning,Rodriguez, Nathalie,Boatman, P. Douglas,Sage, Carleton R.,Lindstrom, Andrew,Xu, Jerry,Schrader, Thomas O.,Smith, Brian M.,Chen, Ruoping,Richman, Jeremy G.,Connolly, Daniel T.,Colletti, Steven L.,Tata, James R.,Semple, Graeme
-
p. 4914 - 4919
(2008/02/12)
-
- Discovery of α,γ-Diketo Acids as Potent Selective and Reversible Inhibitors of Hepatitis C Virus NS5b RNA-Dependent RNA Polymerase
-
α,γ-Diketo acids (DKA) were discovered from screening as selective and reversible inhibitors of hepatitis C virus NS5b RNA-dependent RNA polymerase. The diketo acid moiety proved essential for activity, while substitution on the γ position was necessary for selectivity and potency. Optimization led to the identification of a DKA inhibitor of NS5b polymerase with IC50 = 45 nM, one of the most potent HCV NS5b polymerase inhibitors reported.
- Summa, Vincenzo,Petrocchi, Alessia,Pace, Paola,Matassa, Victor G.,De Francesco, Raffaele,Altamura, Sergio,Tomei, Licia,Koch, Uwe,Neuner, Philippe
-
-
- Utility of Complementary Molecular Reactivity and Molecular Recognition (CMR/R) Technology and Polymer-Supported Reagents in the Solution-Phase Synthesis of Heterocyclic Carboxamides
-
The use of our recently reported chemical library purification strategy in the development of a herbicidal lead, N-(3-benzoylphenyl)-3-(1,1-dimethylethyl)-1-methyl-1H-pyrazole-5-carboxamide (3), is described. The approach applying fundamental properties of complementary molecular reactivity and molecular recognition (CMR/R) as the basis for a general purification strategy was utilized. Polymeric reagents were used in the synthesis to generate reactive species involved in product formation, and complementary molecular reactivity/molecular recognition polymer 8 (CMR/R polymer 8) was used in the solution-phase syntheses of building blocks, primary libraries, and lead refinement libraries. An extension of the CMR/R methodology was applied, utilizing a sequestration enabling reagent (SER), transforming a reactant into an electrophilic species sequestrable by CMR/R polymer 8. This library purification strategy enabled rapid lead generation and lead refinement to afford herbicide 27o. The CMR/R solid-phase purification technique enabled a simple, general, and powerful protocol, eliminating the usual tedious and time-consuming methods required for solution-phase product purification. The result was the synthesis of hundreds of compounds, prepared in a relatively short time, leading to a compound with a 4-fold improvement in herbicidal activity over the initial lead.
- Parlow, John J.,Mischke, Deborah A.,Woodard, Scott S.
-
p. 5908 - 5919
(2007/10/03)
-
- Evidence for Ketene Intermediates in the Decarbonylation of 2,4-Dioxo Acids and Esters and 2-Oxobutanedioic Acid Esters
-
The mechanism by which α,γ-dioxo carboxylic acid esters 1 and 2-oxobutanedioic acid diesters 2 lose CO was explored.The compounds, 5,5-dimethyl-2,4-dioxohexanoic acid ethyl ester, 1a, α-2-dioxocyclohexaneacetic acid ethyl ester, 1b, and α,1-dioxotetrahydro-2-naphthaleneacetic acid ethyl ester, 1c, lose CO at 170-190 deg C to yield the corresponding β-keto esters 3a-c.When compounds 1 or the parent acids 4 were heated to 170-190 deg C with water in a sealed reactor, they yielded ketones resulting from replacement by H of C(O)CO2R from 1 or C(O)CO2H from 4. β-Ketoesters suffered replacement by H of the carbethoxy group to yield the corresponding ketones when heated with water at about 105 deg C.Acylketenes, such as 4,4-dimethyl-1-pentene-1,3-dione, 6a, 2-oxo-cyclohexylidenemethanone, 6b, 1-oxotetrahydro-2-naphthylidenemethanone, 6c, 3-methyl-1-butene-1,3-dione, 6d, and 1-butene-1,3-dione, 6e, are implicated as the common intermediates that react with water to form β-keto acids that subsequently decarboxylateto yield the ketones 5.Intense IR frequencies in the region of 2120-2140 cm-1, characteristic of ketenes, are observed when 1, 2, or 3 is subjected to GC-FTIR analysis with the injector and light pipe at 280 deg C.Loss of carbon monoxide and alcohol at high temperature is required to form 6 from 1, while only the loss of alcohol at lower temperature is needed to form 6 from 3.
- Emerson, David W.,Titus, Richard L.,Gonzalez, Rowena M.
-
p. 5301 - 5307
(2007/10/02)
-
- Process for the preparation of pivaloylpyruvic acid esters
-
An improved process for the preparation of pivaloylpyruyic acid ester by reaction of pinacolin with an oxalic acid dialkyl ester followed by neutralization of the reaction mixture is disclosed, wherein the reactants are mixed at a temperature of -50° to +
- -
-
-