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1.
Bioorg Med Chem Lett ; 25(22): 5121-6, 2015 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-26471092
2.
Steroids ; 73(5): 574-7, 2008 May.
Artigo em Inglês | MEDLINE | ID: mdl-18313708

RESUMO

A highly selective method to protect the 11 beta-OH position of steroid (1) has been developed. This is achieved via double silyl protection of the 11 beta, 17 alpha-diol, followed by selective desilylation of the 17 alpha-OH under basic conditions without the need for a fluoride source.


Assuntos
Esteroides/química , Esteroides/síntese química , Relação Estrutura-Atividade
3.
ACS Med Chem Lett ; 6(4): 419-24, 2015 Apr 09.
Artigo em Inglês | MEDLINE | ID: mdl-25893043

RESUMO

The transient receptor potential (TRP) family of ion channels comprises nonselective cation channels that respond to a wide range of chemical and thermal stimuli. TRPM8, a member of the melastatin subfamily, is activated by cold temperatures (<28 °C), and antagonists of this channel have the potential to treat cold induced allodynia and hyperalgesia. However, TRPM8 has also been implicated in mammalian thermoregulation and antagonists have the potential to induce hypothermia in patients. We report herein the identification and optimization of a series of TRPM8 antagonists that ultimately led to the discovery of PF-05105679. The clinical finding with this compound will be discussed, including both efficacy and its ability to affect thermoregulation processes in humans.

4.
Future Med Chem ; 3(13): 1679-701, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21942256

RESUMO

The administration of compounds by a dry-powder inhaler presents significant challenges to the development and discovery chemist, owing to the stringent requirements placed upon the physical characteristics of the active pharmaceutical ingredient and the high complexity of the molecules concerned. The current state of synthetic chemistry technology is such that commercial syntheses of these compounds are demanding but achievable. While synthetic chemistry will remain a major component of the development of inhaled therapies, the main challenge facing practitioners in this area is the early identification of a suitable solid form. Further advances in the prediction of solid-form properties would significantly enable this field and may allow triage of molecules to be carried out at the design stage of projects.


Assuntos
Química Farmacêutica , Formas de Dosagem , Administração por Inalação , Pós
5.
J Med Chem ; 54(19): 6888-904, 2011 Oct 13.
Artigo em Inglês | MEDLINE | ID: mdl-21870878

RESUMO

A novel tertiary amine series of potent muscarinic M(3) receptor antagonists are described that exhibit potential as inhaled long-acting bronchodilators for the treatment of chronic obstructive pulmonary disease. Geminal dimethyl functionality present in this series of compounds confers very long dissociative half-life (slow off-rate) from the M(3) receptor that mediates very long-lasting smooth muscle relaxation in guinea pig tracheal strips. Optimization of pharmacokinetic properties was achieved by combining rapid oxidative clearance with targeted introduction of a phenolic moiety to secure rapid glucuronidation. Together, these attributes minimize systemic exposure following inhalation, mitigate potential drug-drug interactions, and reduce systemically mediated adverse events. Compound 47 (PF-3635659) is identified as a Phase II clinical candidate from this series with in vivo duration of action studies confirming its potential for once-daily use in humans.


Assuntos
Azetidinas/síntese química , Broncodilatadores/síntese química , Ácidos Difenilacéticos/síntese química , Doença Pulmonar Obstrutiva Crônica/tratamento farmacológico , Receptor Muscarínico M3/antagonistas & inibidores , Administração por Inalação , Animais , Azetidinas/química , Azetidinas/farmacologia , Broncodilatadores/química , Broncodilatadores/farmacologia , Células CHO , Linhagem Celular , Permeabilidade da Membrana Celular , Cricetinae , Cricetulus , Ácidos Difenilacéticos/química , Ácidos Difenilacéticos/farmacologia , Cães , Feminino , Cobaias , Hepatócitos/metabolismo , Humanos , Técnicas In Vitro , Cinética , Masculino , Microssomos Hepáticos/metabolismo , Relaxamento Muscular/efeitos dos fármacos , Músculo Liso/efeitos dos fármacos , Músculo Liso/fisiologia , Ensaio Radioligante , Ratos , Receptor Muscarínico M3/metabolismo , Proteínas Recombinantes/antagonistas & inibidores , Proteínas Recombinantes/metabolismo , Estereoisomerismo , Relação Estrutura-Atividade , Traqueia/efeitos dos fármacos , Traqueia/fisiologia
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