Discovery of 3-aminopicolinamides as metabotropic glutamate receptor subtype 4 (mGlu4) positive allosteric modulator warheads engendering CNS exposure and in vivo efficacy
作者:Rocco D. Gogliotti、Darren W. Engers、Pedro M. Garcia-Barrantes、Joseph D. Panarese、Patrick R. Gentry、Anna L. Blobaum、Ryan D. Morrison、J. Scott Daniels、Analisa D. Thompson、Carrie K. Jones、P. Jeffrey Conn、Colleen M. Niswender、Craig W. Lindsley、Corey R. Hopkins
DOI:10.1016/j.bmcl.2016.04.041
日期:2016.6
This letter describes the further chemical optimization of the picolinamide-derived family of mGlu4 PAMs wherein we identified a 3-amino substituent to the picolinamide warhead that engendered potency, CNS penetration and in vivo efficacy. From this optimization campaign, VU0477886 emerged as a potent (EC50=95nM, 89% Glu Max) mGlu4 PAM with an attractive DMPK profile (brain:plasma Kp=1.3), rat CLp=4
这封信描述了衍生自mGlu4 PAM的甲基吡啶酰胺的家族的进一步化学优化,其中我们确定了甲基吡啶弹头的3-氨基取代基,从而增强了效能,中枢神经系统的穿透力和体内功效。通过此优化活动,VU0477886成为了一种有效的(EC50 = 95nM,89%Glu Max)mGlu4 PAM,具有有吸引力的DMPK分布(大脑:血浆Kp = 1.3),大鼠CLp = 4.0mL / min / kg,t1 / 2 = 3.7h)和在我们标准的临床前帕金森氏病模型氟哌啶醇诱发的僵直症(HIC)中的强大功效。