Pyrazolo[1,5-<i>a</i>]-1,3,5-triazine as a Purine Bioisostere: Access to Potent Cyclin-Dependent Kinase Inhibitor (<i>R</i>)-Roscovitine Analogue
作者:Florence Popowycz、Guy Fournet、Cédric Schneider、Karima Bettayeb、Yoan Ferandin、Cyrile Lamigeon、Oscar M. Tirado、Silvia Mateo-Lozano、Vicente Notario、Pierre Colas、Philippe Bernard、Laurent Meijer、Benoît Joseph
DOI:10.1021/jm801340z
日期:2009.2.12
Pharmacological inhibitors of cyclin-dependent kinases (CDKs) have a wide therapeutic potential. Among the CDK inhibitors currently under clinical trials, the 2,6,9-trisubstituted purine (R)-roscovitine displays rather high selectivity, low toxicity, and promising antitumor activity. In an effort to improve this structure, we synthesized several bioisosteres of roscovitine. Surprisingly, one of them, pyrazolo[1,5-a]-1,3,5-triazine 7a (N-&-N1, GP0210), displayed significantly higher potency, compared to (R)-roscovitine and imidazo[2,1-f]-1,2,4-triazine 13 (N-&-N2, GP0212), at inhibiting various CDKs and at inducing cell death in a wide variety of human tumor cell lines. This approach may thus provide second generation analogues with enhanced biomedical potential.