Synthesis of selenophene derivatives as novel CHK1 inhibitors

A series of selenophene derivatives (i.e., 31) are reported as potent inhibitors of CHK1 kinase. A series of selenophene derivatives 3 were synthesized as potential CHK1 inhibitors. The effects of substitution on the 4′- or 5′-position of selenophene moiety and shifting the hydroxyl group position on C6- phenolic ring of oxindole were explored. This study led to the discovery of the most potent CHK1 inhibitors 29– 33 and 39– 43, which had IC 50 values in the subnanomolar range.