Discovery and optimization of new oxadiazole substituted thiazole RORγt inverse agonists through a bioisosteric amide replacement approach
作者:Christoph Steeneck、Christian Gege、Olaf Kinzel、Michael Albers、Gerald Kleymann、Thomas Schlüter、Andreas Schulz、Xiaohua Xue、Maxwell D. Cummings、Anne M. Fourie、Kristi A. Leonard、Brian Scott、James P. Edwards、Thomas Hoffmann、Steven D. Goldberg
DOI:10.1016/j.bmcl.2020.127174
日期:2020.6
Starting from previously identified thiazole-2-carboxamides exemplified by compound 1/6, two new series of ROR gamma t inverse agonists with significantly improved aqueous solubility, ADME parameters and oral PK properties were discovered. These scaffolds were identified from a bioisosteric amide replacement approach. Amongst the variety of heterocycles explored, a 1,3,4-oxadiazole led to compounds with the best overall profile for SAR development and in vivo exploration. In an ex vivo mouse PD model, concentration dependent efficacy was demonstrated and compounds 3/5 and 6/3 were profiled in a 5-day rat tolerability study.