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Identification of highly selective and potent orexin receptor 1 antagonists derived from a dual orexin receptor 1/2 antagonist based on the structural framework of pyrazoylethylbenzamide.
- Source :
-
Bioorganic & Medicinal Chemistry . Oct2017, Vol. 25 Issue 20, p5203-5215. 13p. - Publication Year :
- 2017
-
Abstract
- The design, synthesis, and structure activity relationships of the novel class of pyrazolylethylbenzamide orexin receptor 1-selective antagonists are described. Further derivatization of the prototype dual orexin receptor 1/2 antagonist lead ( 1 ) by installing a ( S )-methyl group into the ethyl linker moiety between the pyrazole ring and benzamide resulted in an increase of the antagonist potency against orexin receptor 1/2 receptors. Optimization of the benzamide and pyrazole parts of compounds 2 and 9b led to the identification of N -ethyl-5-fluoro- N -{(2 S )-1-[5-(4-fluorophenyl)-2 H -tetrazol-2-yl]propan-2-yl}-2-(pyrimidin-2-yl)benzamide ( 24 ), which exhibited excellent antagonistic activity against orexin receptor 1 with an IC 50 of 2.01 nM and a 265-fold selectivity for orexin receptor 1 over orexin receptor 2. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09680896
- Volume :
- 25
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Bioorganic & Medicinal Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 125468608
- Full Text :
- https://doi.org/10.1016/j.bmc.2017.07.051