Synthesis, binding affinity, radiolabeling, and microPET evaluation of 4-(2-substituted-4-substituted)-8-(dialkylamino)-6-methyl-1-substituted-3,4-dihydropyrido[2,3-b]pyrazin-2(1H)-ones as ligands for brain corticotropin-releasing factor type-1 (CRF1) receptors
摘要:
Compounds 1-14 were synthesized in a search for high-affinity CRF1 receptor ligands that could be radiolabeled with C-11 or F-18 for use as positron emission tomography (PET) radiotracers. Derivatives of 2 were developed which contained amide N-fluoroalkyl substituents. Compounds [F-18]24 and [F-18]25 were found to have appropriate lipophilicities of logP(7.4) = 2.2 but microPET imaging with [F-18]25 demonstrated limited brain uptake. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis, Structure−Activity Relationships, and in Vivo Properties of 3,4-Dihydro-1H-pyrido[2,3-b]pyrazin-2-ones as Corticotropin-Releasing Factor-1 Receptor Antagonists
摘要:
Corticotropin releasing factor (CRF) is the primary regulator of the hypothalamus-pituitary-adrenal (HPA) axis, coordinating the endocrine, behavioral, and autonomic responses to stress. It has been postulated that small molecules that can antagonize the binding of CRF, to its receptor may serve as a treatment for anxiety-related and/or affective disorders. Members within a series of 3,4-dihydro-1H-pyrido[2,3-b]pyrazin-2-ones, exemplified by compound 2 (IC50 = 0.70 nM), were found to be very potent antagonists of CRF1. Compound 8w showed high CRF1 receptor binding affinity and was examined further in vivo. The compound was efficacious in a defensive withdrawal model of anxiety in rats and had a long half-life and reasonable oral bioavailability in dog pharmacokinetic studies.
Synthesis, Structure−Activity Relationships, and in Vivo Properties of 3,4-Dihydro-1<i>H</i>-pyrido[2,3-<i>b</i>]pyrazin-2-ones as Corticotropin-Releasing Factor-1 Receptor Antagonists
作者:Carolyn D. Dzierba、Amy G. Takvorian、Maria Rafalski、Padmaja Kasireddy-Polam、Harvey Wong、Thaddeus F. Molski、Ge Zhang、Yu-Wen Li、Snjezana Lelas、Yong Peng、John F. McElroy、Robert C. Zaczek、Rebecca A. Taub、Andrew P. Combs、Paul J. Gilligan、George L. Trainor
DOI:10.1021/jm049737f
日期:2004.11.1
Corticotropin releasing factor (CRF) is the primary regulator of the hypothalamus-pituitary-adrenal (HPA) axis, coordinating the endocrine, behavioral, and autonomic responses to stress. It has been postulated that small molecules that can antagonize the binding of CRF, to its receptor may serve as a treatment for anxiety-related and/or affective disorders. Members within a series of 3,4-dihydro-1H-pyrido[2,3-b]pyrazin-2-ones, exemplified by compound 2 (IC50 = 0.70 nM), were found to be very potent antagonists of CRF1. Compound 8w showed high CRF1 receptor binding affinity and was examined further in vivo. The compound was efficacious in a defensive withdrawal model of anxiety in rats and had a long half-life and reasonable oral bioavailability in dog pharmacokinetic studies.
Synthesis, binding affinity, radiolabeling, and microPET evaluation of 4-(2-substituted-4-substituted)-8-(dialkylamino)-6-methyl-1-substituted-3,4-dihydropyrido[2,3-b]pyrazin-2(1H)-ones as ligands for brain corticotropin-releasing factor type-1 (CRF1) receptors
作者:Jeffrey S. Stehouwer、Chase H. Bourke、Michael J. Owens、Ronald J. Voll、Clinton D. Kilts、Mark M. Goodman
DOI:10.1016/j.bmcl.2015.10.010
日期:2015.11
Compounds 1-14 were synthesized in a search for high-affinity CRF1 receptor ligands that could be radiolabeled with C-11 or F-18 for use as positron emission tomography (PET) radiotracers. Derivatives of 2 were developed which contained amide N-fluoroalkyl substituents. Compounds [F-18]24 and [F-18]25 were found to have appropriate lipophilicities of logP(7.4) = 2.2 but microPET imaging with [F-18]25 demonstrated limited brain uptake. (C) 2015 Elsevier Ltd. All rights reserved.