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1.
ACS Med Chem Lett ; 11(12): 2504-2509, 2020 Dec 10.
Artículo en Inglés | MEDLINE | ID: mdl-33335674

RESUMEN

The 6-benzhydryl-4-amino-quinolin-2-ones are peripherally restricted CB1 receptor inverse agonists (CB1RIAs) that have been reported to attenuate obesity and improve insulin sensitivity in the diet-induced obese (DIO) mouse model. However, chronic dosing of select compounds from the series showed time-dependent brain accumulation despite a low brain/plasma exposure ratio. To address this issue, a PEGylation approach was employed to identify a novel series of homodimeric 6-benzhydryl-4-amino-quinazoline-PEG conjugates with an extended half-life. The lead compound 18 engaged peripheral CB1Rs in a gastrointestinal (GI) tract motility study and demonstrated a high level of peripheral restriction in a chronic DIO mouse pharmacokinetic study.

3.
Bioorg Med Chem Lett ; 28(7): 1182-1187, 2018 04 15.
Artículo en Inglés | MEDLINE | ID: mdl-29523385

RESUMEN

Synthesis and biological evaluation of benzocyclobutane-C-glycosides as potent and orally active SGLT1/SGLT2 dual inhibitors are described. Compound 19 showed high inhibitory potency at SGLT1 (IC50 = 45 nM), and excellent potency at SGLT2 (IC50 = 1 nM). It also displayed excellent PK profiles in mice, rats, dogs and monkeys (F = 78-107%). In SD rats, compound 19 treatments significantly reduced blood glucose levels in a dose-dependent manner. In ZDF rats, compound 19 displayed anti-hyperglycemic effect up to 24 h. Therefore, compound 19 may serve as valuable pharmacological tool, and potential use as a treatment for metabolic syndrome.


Asunto(s)
Derivados del Benceno/farmacología , Ciclobutanos/farmacología , Glicósidos/farmacología , Transportador 1 de Sodio-Glucosa/antagonistas & inhibidores , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Administración Oral , Animales , Derivados del Benceno/administración & dosificación , Derivados del Benceno/química , Ciclobutanos/administración & dosificación , Ciclobutanos/química , Perros , Relación Dosis-Respuesta a Droga , Glicósidos/administración & dosificación , Glicósidos/química , Haplorrinos , Humanos , Ratones , Estructura Molecular , Ratas , Transportador 1 de Sodio-Glucosa/metabolismo , Transportador 2 de Sodio-Glucosa/metabolismo , Relación Estructura-Actividad
5.
ACS Med Chem Lett ; 8(9): 947-952, 2017 Sep 14.
Artículo en Inglés | MEDLINE | ID: mdl-28947942

RESUMEN

We have discovered a novel series of isothiazole-based phenylpropanoic acids as GPR120 agonists. Extensive structure-activity relationship studies led to the discovery of a potent GPR120 agonist 4x, which displayed good EC50 values in both calcium and ß-arrestin assays. It also presented good pharmaceutical properties and a favorable PK profile. Moreover, it demonstrated in vivo antidiabetic activity in C57BL/6 DIO mice. Studies in WT and knockout DIO mice showed that it improved glucose handling during an OGTT via GPR120. Overall, 4x possessed promising antidiabetic effect and good safety profile to be a development candidate.

6.
Bioorg Med Chem Lett ; 27(15): 3272-3278, 2017 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-28642104
7.
ACS Med Chem Lett ; 8(5): 560-565, 2017 May 11.
Artículo en Inglés | MEDLINE | ID: mdl-28523111

RESUMEN

We have discovered a novel series of tetrahydrobenzimidazoles 3 as TGR5 agonists. Initial structure-activity relationship studies with an assay that measured cAMP levels in murine enteroendocrine cells (STC-1 cells) led to the discovery of potent agonists with submicromolar EC50 values for mTGR5. Subsequent optimization through methylation of the 7-position of the core tetrahydrobenzimidazole ring resulted in the identification of potent agonists for both mTGR5 and hTGR5 (human enteroendocrine NCI-H716 cells). While the lead compounds displayed low to moderate exposure after oral dosing, they significantly reduced blood glucose levels in C57 BL/6 mice at 30 mg/kg and induced a 13-22% reduction in the area under the blood glucose curve (AUC)0-120 min in oral glucose tolerance tests (OGTT).

9.
J Org Chem ; 81(8): 3464-9, 2016 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-27052958

RESUMEN

Phosphonium salt-activated, Pd-catalyzed Suzuki-Miyaura and Sonogashira cross-coupling reactions of cyclic 1,3-diones in the synthesis of ß-substituted cyclic enones are described. These transformations exhibit good isolated yield and high generality with respect to both substrates and coupling partners. Extension of the substrate scope to cyclic 1,3-dione equivalents, such as 2-cyanocyclohexanone (4), is also briefly examined.

10.
Bioorg Med Chem Lett ; 24(23): 5502-6, 2014 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-25455493

RESUMEN

Novel antibacterial fluoroquinolone agents bearing a 4-alkylidenylpiperidine 7-position substituent are active against quinolone-susceptible and quinolone-resistant gram-positive bacteria, including Streptococcus pneumoniae and MRSA. Analogs 22b, 23c, and 24 demonstrated superior in vitro and in vivo efficacy to ciprofloxacin against these cocci.


Asunto(s)
Antibacterianos/farmacología , Bacterias Grampositivas/efectos de los fármacos , Quinolonas/farmacología , Inhibidores de Topoisomerasa/farmacología , Humanos
11.
Bioorg Med Chem Lett ; 24(5): 1437-41, 2014 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-24405703

RESUMEN

Design, synthesis, and biological evaluation of pyridazine-based, 4-bicyclic heteroaryl-piperidine derivatives as potent stearoyl-CoA desaturase-1 (SCD1) inhibitors are described. In a chronic study of selected analog (3e) in Zucker fa/fa (ZF) rat, dose-dependent decrease of body weight gain and plasma fatty acid desaturation index (DI) in both C16 and C18 are also demonstrated. The results indicate that the plasma fatty acid DI may serve as an indicator for direct target engagement and biomarker for SCD1 inhibition.


Asunto(s)
Compuestos Bicíclicos con Puentes/química , Inhibidores Enzimáticos/química , Piridazinas/química , Estearoil-CoA Desaturasa/antagonistas & inhibidores , Administración Oral , Animales , Peso Corporal/efectos de los fármacos , Diseño de Fármacos , Inhibidores Enzimáticos/farmacocinética , Inhibidores Enzimáticos/farmacología , Inhibidores Enzimáticos/uso terapéutico , Semivida , Humanos , Ratones , Microsomas Hepáticos/metabolismo , Obesidad/tratamiento farmacológico , Piridazinas/farmacocinética , Piridazinas/farmacología , Piridazinas/uso terapéutico , Ratas , Ratas Sprague-Dawley , Ratas Zucker , Estearoil-CoA Desaturasa/metabolismo , Relación Estructura-Actividad
13.
Bioorg Med Chem Lett ; 21(21): 6485-90, 2011 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-21925881

RESUMEN

The discovery of potent N-hydroxyl caprolactam matrix metalloproteinase (MMP) inhibitors (6) based on the natural product Cobactin-T (2) is described. The synthetic method, which utilizes the ring closing metathesis reaction, is compatible to provide complementary (R) and (S) enantiomers. These compounds tested against MMP-2 and 9, show that the R stereochemistry (i.e., 16), which is opposite for that found in the natural product Cobactin-T is >1000-fold more active with IC(50) values of 0.2-0.6nM against both enzymes. The variation in the incorporation of the sulfonamide enzyme recognition element (Ar(2)XAr(1)SO(2)N(R(1)), 6), along with alterations in the RCM/double bond chemistry (R(2)) provided a series of sub nanomolar MMP inhibitors. For example, compounds 16 and 34 were found to be the most potent with IC(50) values against MMP-2 and MMP-9 found to be between 0.2 and 0.6nM with 34 being the most potent compound discovered (MMP-2 IC(50)=0.39nM and MMP-9 IC(50)=0.22nM). Compounds 16 and 34 showed acceptable drug-like properties in vivo with compound 34 showing oral bioavailability.


Asunto(s)
Azepinas/farmacología , Inhibidores de la Metaloproteinasa de la Matriz , Inhibidores de Proteasas/farmacología , Azepinas/farmacocinética , Disponibilidad Biológica , Ciclización , Descubrimiento de Drogas , Concentración 50 Inhibidora , Inhibidores de Proteasas/farmacocinética , Estereoisomerismo
14.
Chem Commun (Camb) ; 46(8): 1347-9, 2010 Feb 28.
Artículo en Inglés | MEDLINE | ID: mdl-20449299

RESUMEN

The first chemoselective direct dehydrative cross-coupling of tautomerizable heterocycles with alkynes has been achieved via C-H/C-OH bond activations with direct C(sp(2))-C(sp) bond formation, which is in line with ideal synthesis using readily available materials.


Asunto(s)
Alquinos/química , Compuestos Heterocíclicos/química , Compuestos Organofosforados/química , Catálisis , Cobre/química , Paladio/química
15.
Bioorg Med Chem Lett ; 20(4): 1432-5, 2010 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-20089400

RESUMEN

2,3-Dihydro-3,8-diphenylbenzo[1,4]oxazines were identified as a new class of potent cholesteryl ester transfer protein inhibitors. The most potent compound 6a (IC50=26 nM) possessed a favorable pharmacokinetic profile with good oral bioavailability in rat (F=53%) and long human liver microsome stability (t(1/2)=62 min). It increased HDL-C in human CETP transgenic mice and high-fat fed hamsters. The structure and activity relationship of this series will be described in this Letter.


Asunto(s)
Benzoxazinas/síntesis química , Proteínas de Transferencia de Ésteres de Colesterol/antagonistas & inhibidores , Diseño de Fármacos , Administración Oral , Animales , Benzoxazinas/química , Benzoxazinas/farmacología , Proteínas de Transferencia de Ésteres de Colesterol/genética , Cricetinae , Inhibidores Enzimáticos/síntesis química , Inhibidores Enzimáticos/química , Inhibidores Enzimáticos/farmacología , Femenino , Humanos , Concentración 50 Inhibidora , Masculino , Ratones , Ratones Transgénicos , Estructura Molecular , Ratas
16.
Bioorg Med Chem Lett ; 19(12): 3333-8, 2009 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-19427203

RESUMEN

The synthesis and biological evaluation of JAK3 based staurosporine compounds is described. The compounds are constructed completely de novo, and a ring closing metathesis strategy is used to assemble the sugar mimetic portion. These analogs show potent JAK3 activity against isolated enzyme and in T-cells. One analog (32) showed unique biological effects during in vitro and in vivo tests including inhibition of STAT5 phosphorylation, blockade of mast cell responses, and reduction of JAK3 based effects in mice models of allergic disease.


Asunto(s)
Hipersensibilidad/tratamiento farmacológico , Janus Quinasa 3/antagonistas & inhibidores , Inhibidores de Proteínas Quinasas/síntesis química , Estaurosporina/síntesis química , Animales , Ciclización , Evaluación Preclínica de Medicamentos , Mastocitos/efectos de los fármacos , Ratones , Fosforilación/efectos de los fármacos , Factor de Transcripción STAT5/metabolismo , Relación Estructura-Actividad , Linfocitos T/enzimología
17.
Bioorg Med Chem Lett ; 19(8): 2333-7, 2009 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-19286381

RESUMEN

2,7-Diamino-thiazolo[4,5-d]pyrimidine analogues were synthesized as novel epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors. Representative compounds showed potent and selective EGFR inhibitory activities and inhibited in vitro cellular proliferation in EGFR-overexpressing human tumor cells. The synthesis and preliminary biological, physical, and pharmacokinetic evaluation of these thiazolopyrimidine compounds are reported.


Asunto(s)
Antineoplásicos/síntesis química , Receptores ErbB/antagonistas & inhibidores , Inhibidores de Proteínas Quinasas/análogos & derivados , Inhibidores de Proteínas Quinasas/síntesis química , Pirimidinas/síntesis química , Antineoplásicos/farmacología , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Ensayos de Selección de Medicamentos Antitumorales/métodos , Humanos , Inhibidores de Proteínas Quinasas/farmacología , Pirimidinas/farmacología
18.
J Med Chem ; 52(6): 1768-72, 2009 Mar 26.
Artículo en Inglés | MEDLINE | ID: mdl-19236017

RESUMEN

With the goal of identifying a CETP inhibitor with high in vitro potency and optimal in vivo efficacy, a conformationally constrained molecule was designed based on the highly potent and flexible 13. The synthetic chemistry efforts led to the discovery of the potent and selective 12. In high-fat fed hamsters, human CETP transgenic mice, and cynomolgus monkeys, the in vivo efficacy of 12 for raising HDL-C was demonstrated to be comparable to torcetrapib.


Asunto(s)
Proteínas de Transferencia de Ésteres de Colesterol/antagonistas & inhibidores , Quinolinas/química , Quinolinas/farmacología , Administración Oral , Animales , Cricetinae , Grasas de la Dieta/administración & dosificación , Diseño de Fármacos , Humanos , Macaca fascicularis , Espectroscopía de Resonancia Magnética , Ratones , Quinolinas/síntesis química , Espectrometría de Masa por Ionización de Electrospray
20.
J Am Chem Soc ; 130(34): 11300-2, 2008 Aug 27.
Artículo en Inglés | MEDLINE | ID: mdl-18665598

RESUMEN

The first direct arylation via C-OH bond activation of tautomerizable heterocycles has been achieved using phosphonium salts, on the basis of a combination of the phosphonium coupling and Suzuki-Miyaura cross-coupling conditions. Optimal reaction condition is obtained through screening of phosphonium salts, Pd catalysts, and bases. The direct arylation via C-OH bond activation tolerates a variety of tautomerizable heterocycles and aryl boronic acids. The mechanism of the Pd-catalyzed phosphonium coupling is proposed to proceed via a domino seven-step process including the unprecedented heterocycle-Pd(II)-phosphonium species. Application of the Pd-catalyzed direct arylation via C-OH bond activation using PyBroP leads to the most efficient synthesis of the biologically important 6-arylpurine ribonucleoside in a single step from unactivated and unprotected inosine.


Asunto(s)
Ácidos Borónicos/química , Carbono/química , Compuestos Heterocíclicos/química , Hidróxidos/química , Organofosfonatos/química , Paladio/química , Catálisis , Modelos Químicos
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