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1.
Org Lett ; 24(31): 5663-5668, 2022 08 12.
Artigo em Inglês | MEDLINE | ID: mdl-35920644

RESUMO

Utilizing quinoline as a mild, catalytic additive, broadly applicable conditions for the Ni/photoredox-catalyzed C(sp2)-C(sp3) cross-coupling of (hetero)aryl bromides and alkyl pinacolboronate esters were developed, which can be applied to both batch and flow reactions. In addition to primary benzylic nucleophiles, both stabilized and nonstabilized secondary alkyl boronic esters are effective coupling partners. Density functional theory calculations suggest that alkyl radical generation occurs from an alkyl-B(pin)-quinoline complex, which may proceed via an energy transfer process.


Assuntos
Brometos , Quinolinas , Catálise , Ésteres , Níquel
2.
Chem Commun (Camb) ; 57(84): 11037-11040, 2021 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-34608906

RESUMO

In recent years, successful assay miniaturization has enabled the exploration of synthesis scale reduction in pharmaceutical discovery. Miniaturization of pharmaceutical synthesis and purification allows a reduction in material consumption and shortens timelines, which ultimately reduces the cost per experiment without compromising data quality. Isolating and purifying the compounds of interest is a key step in the library synthesis process. In this manuscript we describe a high-throughput purification workflow in support of microscale (1-5 µmol or 0.5-2 mg) library synthesis. The optimized microscale purification system can routinely purify 384-well reaction plates with an analysis time of 4 min per sample. Instrument optimization, critical parameters such as column loading, delay time calibration, ultrafast pre- and post-purification analysis and library purification examples are provided.


Assuntos
Ensaios de Triagem em Larga Escala/métodos , Bibliotecas de Moléculas Pequenas/isolamento & purificação , Cromatografia Líquida de Alta Pressão , Miniaturização , Espectrometria de Massas em Tandem
3.
Bioorg Med Chem Lett ; 35: 127778, 2021 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-33422603

RESUMO

The discovery of a series of substituted diarylether compounds as retinoic acid related orphan receptor γt (RORγt) agonists is described. Compound 1 was identified from deck mining as a RORγt agonist. Hit-to-lead optimization led to the identification of lead compound 5, which possesses improved potency (10x). Extensive SAR exploration led to the identification of a potent and selective compound 22, that demonstrated an improved pharmacokinetic profile and a dose-dependent pharmacodynamic response. However, when dosed in a MC38 syngeneic tumor model, no evidence of efficacy was observed. ©2020 Elsevier Science Ltd. All rights reserved.


Assuntos
Éteres/farmacologia , Membro 3 do Grupo F da Subfamília 1 de Receptores Nucleares/agonistas , Tretinoína/farmacologia , Animais , Cristalografia por Raios X , Relação Dose-Resposta a Droga , Éteres/síntese química , Éteres/química , Humanos , Camundongos , Modelos Moleculares , Estrutura Molecular , Relação Estrutura-Atividade , Células Th17 , Tretinoína/síntese química , Tretinoína/química
4.
J Org Chem ; 85(17): 11519-11530, 2020 09 04.
Artigo em Inglês | MEDLINE | ID: mdl-32786620

RESUMO

Unnatural amino acids play an important role in peptide based drug discovery. Herein, we report a class of differentially protected azatryptophan derivatives synthesized from N-tosyl-3-haloazaindoles 1 and Fmoc-protected tert-butyl iodoalanine 2 via a Negishi coupling. Through ligand screening, Pd2(dba)3/XPhos was found to be a superior catalyst for the coupling of 1 with the zinc derivative of 2 to give tert-butyl (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-3-yl)propanoate derivatives 3 in 69-91% isolated yields. In addition, we have demonstrated that the protecting groups, namely, Ts, Fmoc, and tBu, can be easily removed selectively.

5.
Bioorg Med Chem Lett ; 30(12): 127204, 2020 06 15.
Artigo em Inglês | MEDLINE | ID: mdl-32334911

RESUMO

Substituted benzyloxy aryl compound 2 was identified as an RORγt agonist. Structure based drug design efforts resulted in a potent and selective tricyclic compound 19 which, when administered orally in an MC38 mouse tumor model, demonstrated a desired pharmacokinetic profile as well as a dose-dependent pharmacodynamic response. However, no perceptible efficacy was observed in this tumor model at the doses investigated.


Assuntos
Compostos de Benzil/farmacologia , Compostos Heterocíclicos/farmacologia , Receptores do Ácido Retinoico/agonistas , Animais , Compostos de Benzil/química , Relação Dose-Resposta a Droga , Feminino , Compostos Heterocíclicos/química , Camundongos , Camundongos Endogâmicos C57BL , Estrutura Molecular , Relação Estrutura-Atividade , Receptor gama de Ácido Retinoico
6.
Bioorg Med Chem Lett ; 30(7): 126955, 2020 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-32035698

RESUMO

This article describes the discovery of aryl hydroxy pyrimidinones and the medicinal chemistry efforts to optimize this chemotype for potent APJ agonism. APJ is a G-protein coupled receptor whose natural agonist peptide, apelin, displays hemodynamic improvement in the cardiac function of heart failure patients. A high throughput screen was undertaken to identify small molecule hits that could be optimized to mimic the apelin in vitro response. A potent and low molecular weight aryl hydroxy pyrimidinone analog 30 was identified through optimization of an HTS hit and medicinal chemistry efforts to improve its properties.


Assuntos
Receptores de Apelina/agonistas , Pirimidinonas/farmacologia , Descoberta de Drogas , Células HEK293 , Ensaios de Triagem em Larga Escala , Humanos , Estrutura Molecular , Pirimidinonas/síntese química , Relação Estrutura-Atividade
7.
Cell ; 168(3): 527-541.e29, 2017 01 26.
Artigo em Inglês | MEDLINE | ID: mdl-28111073

RESUMO

Advances in the synthesis and screening of small-molecule libraries have accelerated the discovery of chemical probes for studying biological processes. Still, only a small fraction of the human proteome has chemical ligands. Here, we describe a platform that marries fragment-based ligand discovery with quantitative chemical proteomics to map thousands of reversible small molecule-protein interactions directly in human cells, many of which can be site-specifically determined. We show that fragment hits can be advanced to furnish selective ligands that affect the activity of proteins heretofore lacking chemical probes. We further combine fragment-based chemical proteomics with phenotypic screening to identify small molecules that promote adipocyte differentiation by engaging the poorly characterized membrane protein PGRMC2. Fragment-based screening in human cells thus provides an extensive proteome-wide map of protein ligandability and facilitates the coordinated discovery of bioactive small molecules and their molecular targets.


Assuntos
Descoberta de Drogas/métodos , Proteômica/métodos , Adipócitos/citologia , Diferenciação Celular , Cristalografia por Raios X , Ensaios de Triagem em Larga Escala , Humanos , Hidrolases/química , Ligantes , Proteínas de Membrana/antagonistas & inibidores , Oxirredutases/química , Ligação Proteica , Receptores de Progesterona/antagonistas & inibidores , Bibliotecas de Moléculas Pequenas
8.
J Mol Biol ; 427(4): 924-942, 2015 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-25579995

RESUMO

The human pregnane X receptor (PXR) is a promiscuous nuclear receptor that functions as a sensor to a wide variety of xenobiotics and regulates expression of several drug metabolizing enzymes and transporters. We have generated "Adnectins", derived from 10th fibronectin type III domain ((10)Fn3), that target the PXR ligand binding domain (LBD) interactions with the steroid receptor co-activator-1 (SRC-1) peptide, displacing SRC-1 binding. Adnectins are structurally homologous to the immunoglobulin superfamily. Three different co-crystal structures of PXR LBD with Adnectin-1 and CCR1 (CC chemokine receptor-1) antagonist Compound-1 were determined. This structural information was used to modulate PXR affinity for a related CCR1 antagonist compound that entered into clinical trials for rheumatoid arthritis. The structures of PXR with Adnectin-1 reveal specificity of Adnectin-1 in not only targeting the interface of the SRC-1 interactions but also engaging the same set of residues that are involved in binding of SRC-1 to PXR. Substituting SRC-1 with Adnectin-1 does not alter the binding conformation of Compound-1 in the ligand binding pocket. The structure also reveals the possibility of using Adnectins as crystallization chaperones to generate structures of PXR with compounds of interest.


Assuntos
Coativador 1 de Receptor Nuclear/química , Receptores CCR1/antagonistas & inibidores , Receptores de Esteroides/química , Ureia/análogos & derivados , Valina/análogos & derivados , Sequência de Aminoácidos , Sítios de Ligação , Cristalografia por Raios X , Humanos , Lignanas/metabolismo , Modelos Moleculares , Dados de Sequência Molecular , Receptor de Pregnano X , Ligação Proteica , Estrutura Terciária de Proteína , Receptores CCR1/metabolismo , Alinhamento de Sequência , Ressonância de Plasmônio de Superfície , Ureia/química , Ureia/metabolismo , Ureia/farmacologia , Valina/química , Valina/metabolismo , Valina/farmacologia
9.
J Med Chem ; 55(22): 9643-53, 2012 Nov 26.
Artigo em Inglês | MEDLINE | ID: mdl-23075267

RESUMO

A series of novel, potent CCR1 inhibitors was developed from a moderately active hit using an iterative parallel synthesis approach. The initial hit (composed of three subunits: an amine, a central amino acid, and an N-terminal cap) became the basis for a series of parallel chemical libraries designed to generate SAR data. Libraries were synthesized that explored each of the three subunits; the CCR1 binding data obtained revealed the following: (1) changes to the amine are not well tolerated; (2) small alkylamino acids are preferred in the center of the molecule; (3) substitutions at the N-terminus are generally well tolerated. These data were used to drive the optimization of the series, ultimately providing a lead with a CCR1 binding IC(50) of 28 nM (48). This lead demonstrates high selectivity for CCR1 over other CCR-family members, high microsomal stability, and good pharmacokinetics in mice.


Assuntos
Quimiotaxia/efeitos dos fármacos , Microssomos Hepáticos/efeitos dos fármacos , Monócitos/efeitos dos fármacos , Piperidinas/farmacologia , Receptores CCR/antagonistas & inibidores , Animais , Cálcio/metabolismo , Células Cultivadas , Humanos , Camundongos , Monócitos/citologia , Técnicas de Patch-Clamp , Piperidinas/síntese química , Piperidinas/farmacocinética , Ligação Proteica , Coelhos , Ratos , Receptores CCR/metabolismo , Relação Estrutura-Atividade , Distribuição Tecidual
11.
J Comb Chem ; 8(5): 664-9, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16961404

RESUMO

The application of parallel synthesis to lead optimization programs in drug discovery has been an ongoing challenge since the first reports of library synthesis. A number of approaches to the application of parallel array synthesis to lead optimization have been attempted over the years, ranging from widespread deployment by (and support of) individual medicinal chemists to centralization as a service by an expert core team. This manuscript describes our experience with the latter approach, which was undertaken as part of a larger initiative to optimize drug discovery. In particular, we highlight how concepts taken from the manufacturing sector can be applied to drug discovery and parallel synthesis to improve the timeliness and thus the impact of arrays on drug discovery.


Assuntos
Técnicas de Química Combinatória , Desenho de Fármacos
13.
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