Document Report Card

ID: ALA1148724

Journal: J Med Chem

Title: Design, synthesis, and biological activity of 5,10-dihydro-dibenzo[b,e][1,4]diazepin-11-one-based potent and selective Chk-1 inhibitors.

Authors: Wang L, Sullivan GM, Hexamer LA, Hasvold LA, Thalji R, Przytulinska M, Tao ZF, Li G, Chen Z, Xiao Z, Gu WZ, Xue J, Bui MH, Merta P, Kovar P, Bouska JJ, Zhang H, Park C, Stewart KD, Sham HL, Sowin TJ, Rosenberg SH, Lin NH.

Abstract: A novel series of 5,10-dihydro-dibenzo[b,e][1,4]diazepin-11-ones have been synthesized as potent and selective checkpoint kinase 1 (Chk1) inhibitors via structure-based design. Aided by protein X-ray crystallography, medicinal chemistry efforts led to the identification of compound 46d, with potent enzymatic activity against Chk1 kinase. While maintaining a low cytotoxicity of its own, compound 46d exhibited a strong ability to abrogate G2 arrest and increased the cytotoxicity of camptothecin by 19-fold against SW620 cells. Pharmacokinetic studies revealed that it had a moderate bioavailabilty of 20% in mice. Two important binding interactions between compound 46b and Chk1 kinase, revealed by X-ray cocrystal structure, were hydrogen bonds between the hinge region and the amide bond of the core structure and a hydrogen bond between the methoxy group and Lys38 of the protein.

CiteXplore: 17658776

DOI: 10.1021/jm070105d