Discovery and structural optimization of pyrazole derivatives as novel inhibitors of Cdc25B

Structural optimization and preliminary structure–activity relationship studies of a series of N-substituted maleimide fused-pyrazole analogues with Cdc25B inhibitory activity, starting from a high-throughput screening hit, are illustrated. A simplified 3,5-diacyl pyrazole analogue was obtained as the most potent compound (118, IC50 = 0.12 μM) with a 270-fold increase in potency.

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