Deregulation of receptor tyrosine kinase c-Met has been reported in human cancers and is considered as an attractive target for small molecule drug discovery. In this study, a series of spiro [indoline-3, 4′-piperidine]-2-ones were designed, synthesized and evaluated as novel c-Met inhibitors. The results showed that the majority of the compounds exhibited significant inhibitory effect on c-Met with IC50 values of 0.0147–17 μM in TR-FRET-based ...