Compounds of formula (I) and pharmaceutically acceptable salts thereof wherein R
1
, R
2
and R
3
represent various functional groups, and one of X
1
and X
2
is N and the other is NR
10
; and their use as pharmaceuticals.
Compounds of formula (I) and pharmaceutically acceptable salts thereof wherein R1, R2 and R3 represent various functional groups, and one of X1 and X2 is N and the other is NR10; and their use as pharmaceuticals.
A series of 4(5)-(6-alkylpyridin-2-yl)imidazoles 13a-p, 17a, and 17b have been synthesized and evaluated for ALK5 inhibitory activity in an enzyme assay and in cell-based luciferase reporter assays. The quinoxalinyl analogue 13e inhibited ALK5 phosphorylation with an IC50 of 0.012 muM and showed more than 90% inhibition at 0.05 muM in a luciferase reporter assay using HaCaT cells transiently transfected