2-[(3a<i>R</i>,4<i>R</i>,5<i>S</i>,7a<i>S</i>)-5-{(1<i>S</i>)-1-[3,5-Bis(trifluoromethyl)phenyl]-2-hydroxyethoxy}-4-(2-methylphenyl)octahydro-2<i>H</i>-isoindol-2-yl]-1,3-oxazol-4(5<i>H</i>)-one: A Potent Human NK<sub>1</sub> Receptor Antagonist with Multiple Clearance Pathways
                                
                                    
                                        作者:Andrew J. Kassick、Jinlong Jiang、Jaime Bunda、David Wilson、Jianming Bao、Huagang Lu、Peter Lin、Richard G. Ball、George A. Doss、Xinchun Tong、Kwei-Lan C. Tsao、Hong Wang、Gary Chicchi、Bindhu Karanam、Richard Tschirret-Guth、Koppara Samuel、Donald F. Hora、Sanjeev Kumar、Maria Madeira、Waisi Eng、Richard Hargreaves、Mona Purcell、Liza Gantert、Jacquelyn Cook、Robert J. DeVita、Sander G. Mills                                    
                                    
                                        DOI:10.1021/jm400751p
                                    
                                    
                                        日期:2013.7.25
                                    
                                    Hydroisoindoline 2 has been previously identified as a potent, brain-penetrant NK1 receptor antagonist with a long duration of action and improved profile of CYP3A4 inhibition and induction compared to aprepitant. However, compound 2 is predicted, based on data in preclinical species, to have a human half-life longer than 40 h and likely to have drug-drug-interactions (DDI), as 2 is a victim of CYP3A4 inhibition caused by its exclusive clearance pathway via CYP3A4 oxidation in humans. We now report 2-[(3aR4R,5S,7aS)-5-(1S)-1-[3,5-bis(trifluoromethyl)phenyl]-2-hydroxyethoxy}-4-(2-methylphenypoctahydro-2H-isoindol-2-yl]-1,3-oxazol-4(5H)-one (3) as a next generation NK1 antagonist that possesses an additional clearance pathway through glucuronidation in addition to that via CYP3A4 oxidation. Compound 3 has a much lower propensity for drug drug interactions and a reduced estimated human half-life consistent with once daily dosing. In preclinical species, compound 3 has demonstrated potency, brain penetration, and a safety profile similar to 2, as well as excellent pharmacokinetics.