Discovery of 3,5-Diphenyl-4-methyl-1,3-oxazolidin-2-ones as Novel, Potent, and Orally Available Δ-5 Desaturase (D5D) Inhibitors
作者:Jun Fujimoto、Rei Okamoto、Naoyoshi Noguchi、Ryoma Hara、Shinichi Masada、Tetsuji Kawamoto、Hiroki Nagase、Yumiko Okano Tamura、Mitsuaki Imanishi、Shuichi Takagahara、Kazuki Kubo、Kimio Tohyama、Koichi Iida、Tomohiro Andou、Ikuo Miyahisa、Junji Matsui、Ryouta Hayashi、Tsuyoshi Maekawa、Nobuyuki Matsunaga
DOI:10.1021/acs.jmedchem.7b01210
日期:2017.11.9
The discovery and optimization of Delta-5 desaturase (D5D) inhibitors are described. Investigation of the 1,3-oxazolidin-2-one scaffold was inspired by a pharmacophore model constructed from the common features of several hit compounds, resulting in the identification of 3,5-diphenyl-1,3-oxazolidin-2-one Sh as a novel lead showing potent in vitro activity. Subsequent optimization focused on the modification of two metabolic sites, which provided (4S,5S)-5i, a derivative with improved metabolic stability. Moreover, adding a substituent into the upper phenyl moiety further enhanced the intrinsic activity, which led to the discovery of 5-[(4S,5S)-5-(4fluorophenyl)-4-methyl-2-oxo-1,3-oxazolidin-3-yl]benzene-1,3-clicarbonitrile (4S,5S)-5n, endowed with excellent DSD binding affinity, cellular activity, and high oral bioavailability in a mouse. It exhibited robust in vivo hepatic arachidonic acid/dihomo-gamma-linolenic acid ratio reduction (a target engagement marker) in an atherosclerosis mouse model. Finally, an asymmetric synthetic procedure for this compound was established.