RESUMO
SAR on HTS hits 1 and 2 led to the potent, Notch-1-sparing GSI 9, which lowered brain Abeta in Tg2576 mice at 100 mg/kg po. Converting the metabolically labile methyl groups in 9 to trifluoromethyl groups afforded the more stable analogue 10, which had improved in vivo potency. Further side chain modification afforded the potent Notch-1-sparing GSI begacestat (5), which was selected for development for the treatment of Alzheimer's disease.
Assuntos
Doença de Alzheimer/tratamento farmacológico , Secretases da Proteína Precursora do Amiloide/antagonistas & inibidores , Descoberta de Drogas , Inibidores Enzimáticos/farmacologia , Receptor Notch1/metabolismo , Sulfonamidas/farmacologia , Tiofenos/farmacologia , Doença de Alzheimer/enzimologia , Secretases da Proteína Precursora do Amiloide/metabolismo , Peptídeos beta-Amiloides/metabolismo , Animais , Cristalografia por Raios X , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Inibidores Enzimáticos/síntese química , Inibidores Enzimáticos/química , Camundongos , Camundongos Transgênicos , Modelos Moleculares , Conformação Molecular , Estereoisomerismo , Relação Estrutura-Atividade , Sulfonamidas/síntese química , Sulfonamidas/química , Tiofenos/síntese química , Tiofenos/químicaRESUMO
Using a cell-based assay, we have identified a new series of Notch-sparing gamma-secretase inhibitors from HTS screening leads 2a and 2e. Lead optimization studies led to the discovery of analog 8e with improved gamma-secretase inhibitory potency and Notch-sparing selectivity.
Assuntos
Secretases da Proteína Precursora do Amiloide/antagonistas & inibidores , Química Farmacêutica/métodos , Inibidores Enzimáticos/síntese química , Inibidores Enzimáticos/farmacologia , Receptores Notch/metabolismo , Doença de Alzheimer/tratamento farmacológico , Amiloide/química , Secretases da Proteína Precursora do Amiloide/química , Carbono/química , Desenho de Fármacos , Avaliação Pré-Clínica de Medicamentos , Humanos , Modelos Químicos , Receptores Notch/antagonistas & inibidores , Relação Estrutura-AtividadeRESUMO
An asymmetric synthesis of alpha-amino acids with novel beta-branched side chains has been implemented. The syntheses feature a p-toluenesulfinylimine induced chiral Strecker approach and were found to be applicable to the introduction of both aliphatic and aromatic beta-branched sidechains for preparation of previously unknown alpha-amino acids.
Assuntos
Aminoácidos/química , Aminoácidos/síntese química , Química Farmacêutica/métodos , Química Orgânica/métodos , Desenho de Fármacos , Modelos Químicos , Conformação MolecularRESUMO
New arylpiperazines related to buspirone, gepirone and NAN-190 were designed and screened in silico for their 5-HT(1A) affinity and potential sites of metabolism by human cytochrome p450 (CYP3A4). Modifications to these structures were assessed in silico for their influence on both 5HT(1A) affinity and metabolism. Selected new molecules were synthesized and purified in a parallel chemistry approach to determine structure activity relationships (SARs). The resulting molecules were assessed in vitro for their 5HT(1A) affinity and half-life in a heterologously expressed human CYP3A4 assay. Molecular features responsible for 5-HT(1A) affinity and CYP3A4 stability are described.
