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2.
Chem Pharm Bull (Tokyo) ; 47(6): 876-9, 1999 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-10399839

RESUMO

In our development of drugs effective against Alzheimer's disease, we have researched a series of aromatic compounds having a characteristic cyclic amine, 1-azabicyclo[3.3.0]octane ring. In this report, we describe synthesis of a series of aromatic heterocycles with the 1-azabicyclo[3.3.0]octane ring and their pharmacological evaluation. 3-Amino-5-(1-azabicyclo[3.3.0]octan-5-yl)methyl-1,2,4-oxadiazole (2b) showed the highest M1 selectivity.


Assuntos
Compostos Bicíclicos Heterocíclicos com Pontes/síntese química , Antagonistas Muscarínicos/síntese química , Animais , Aprendizagem da Esquiva/efeitos dos fármacos , Ligação Competitiva/efeitos dos fármacos , Química Encefálica/efeitos dos fármacos , Compostos Bicíclicos Heterocíclicos com Pontes/farmacologia , Técnicas In Vitro , Camundongos , Antagonistas Muscarínicos/farmacocinética , Antagonistas Muscarínicos/farmacologia , Parassimpatomiméticos/farmacologia , Pirenzepina/farmacocinética , Quinuclidinil Benzilato/farmacocinética , Ratos , Receptor Muscarínico M1 , Receptor Muscarínico M2 , Receptores Muscarínicos/efeitos dos fármacos , Escopolamina/farmacologia , Compostos de Espiro/farmacologia
4.
Chem Pharm Bull (Tokyo) ; 46(6): 1039-43, 1998 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-9658578

RESUMO

The enantiomers, (R)-(-)-1 and (S)-(+)-1, of (+/-)-4-amino-N-[2-(1-azabicyclo[3.3.0]octan-5-yl)ethyl]-5-chloro-2,3- dihydro-2-methylbenzo[b]furan-7-carboxamide [(+/-)-1] were prepared from optically active benzyl 4-acetylamino-2,3-dihydro-2-methylbenzo[b]furan-7-carboxylate [(R)-(+)-6, (S)-(-)-6], respectively. The requisite (R)-(+)-6 and (S)-(-)-6 were prepared by large-scale preparative HPLC on chiral stationary phases (CSPs). The absolute configuration of (S)-(+)-1 was determined by single crystal X-ray analysis. The serotonin 5-HT4 receptor agonistic activity of (S)-(-)-1 hemifumarate (SK-951) which was hemifumarate of (S)-(+)-1 was about twice that of the other enantiomer (R)-(+)-1 hemifumarate which was hemifumarate of (R)-(-)-1.


Assuntos
Receptores de Serotonina/efeitos dos fármacos , Agonistas do Receptor de Serotonina/síntese química , Animais , Cristalografia por Raios X , Esôfago/efeitos dos fármacos , Esôfago/metabolismo , Relaxamento Muscular/efeitos dos fármacos , Músculo Liso/efeitos dos fármacos , Ratos , Receptores de Serotonina/metabolismo , Receptores 5-HT4 de Serotonina , Agonistas do Receptor de Serotonina/farmacologia , Estereoisomerismo , Relação Estrutura-Atividade
5.
Chem Pharm Bull (Tokyo) ; 46(5): 797-806, 1998 May.
Artigo em Inglês | MEDLINE | ID: mdl-9621414

RESUMO

To investigate the biological selectin-ligand interactions, fourteen sulfated and eight phosphorylated beta-D-galacto- and lactopyranosides containing branched fatty-alkyl residues in place of the ceramide have been synthesized. Regioselective sulfation of the parent glycolipids through the dibutylstannylene acetal with a certain amount of sulfur trioxide-trimethylamine complex produced the target sulfated glycolipids, while stepwise phosphorylation by treatment of the properly protected diol with dibenzyloxy(diisopropylamino)phosphine gave the phosphorylated glycolipids. The synthetic glycolipids showed an interesting mode of inhibition of the binding of HL-60 cells to immobilized P-, L- and E-selectins during in vitro experiments. In addition, using computer modeling techniques, we examined the molecular basis for the ligand-selectin complex formation. These glycolipids may be useful as therapeutic agents against selectin-dependent inflammation.


Assuntos
Anti-Inflamatórios não Esteroides/síntese química , Galactosídeos/síntese química , Glicosídeos/síntese química , Anti-Inflamatórios não Esteroides/metabolismo , Anti-Inflamatórios não Esteroides/farmacologia , Adesão Celular/efeitos dos fármacos , Desenho de Fármacos , Galactosídeos/metabolismo , Galactosídeos/farmacologia , Glicosídeos/farmacologia , Células HL-60 , Humanos , Ligantes , Modelos Moleculares , Conformação Molecular , Relação Estrutura-Atividade
6.
Biosci Biotechnol Biochem ; 62(3): 590-2, 1998 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-9571794

RESUMO

A convenient synthesis of the sialyl Lewis X (sLe(x)) tetrasaccharide, NeuAc alpha 2-3Gal beta 1-4(Fuc alpha 1-3)GlcNAc (8), as a carbohydrate ligand for selectins is described. The key step is the reaction between NeuAc alpha 2-3GalSMe (5) as a glycosyl donor and the suitably protected Fuc alpha 1-3GlcNAc derivative (4) as the glycosyl acceptor by using dimethyl(methylthio)sulfonium triflate (DMTST) as the promoter.


Assuntos
Oligossacarídeos/síntese química , Sequência de Carboidratos , Glicosilação , Dados de Sequência Molecular , Antígeno Sialil Lewis X
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