中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-溴-2-硝基苯胺 | 4-Bromo-2-nitroaniline | 875-51-4 | C6H5BrN2O2 | 217.022 |
We report a series of efficient procedures to prepare 2-nitrophenyl-4-aryl-1,2,3-triazoles avoiding the isolation of potentially hazardous 2-nitrophenyl azides. An organocatalyzed azide-enolate variant allows efficient access to the target compounds while it was shown that a metal-catalyzed azide-alkyne procedure involving a preliminary Sonogashira coupling was feasible starting from electron-deficient aryl iodides.
Three series of our lead CLK1 inhibitor DB18 have been designed, synthetized and tested against CLKs and DYRK1A kinases. Their cytotoxicity was subsequently measured on seven representative cancer cell lines. Guided by docking experiments, we focused on the less constrained part of the scaffold, and showed that drastically different substituents can be tolerated here. This work ended with the discovery of another promising derivative 12g, with IC50 = 0.004 µM in the inhibition of HsCLK1 and IC50 = 3.94 µM for the inhibition of HsDYRK1A. The SAR results are discussed in the light of extensive molecular modeling analyses. Finally, a kinome scan (463 human kinases) confirmed the outstanding selectivity of our lead compound DB18, suggesting that this scaffold is of prominent interest for selective CLK inhibitors. Altogether, these results pave the way for the development of inhibitors with novel selectivities in this family of kinases.