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Bioorg Med Chem Lett. 2012 Jan 15;22(2):1136-41. doi: 10.1016/j.bmcl.2011.11.100. Epub 2011 Dec 1.

Design and synthesis of novel macrocyclic 2-amino-6-arylpyrimidine Hsp90 inhibitors.

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  • 1Kamakura Laboratories, Research Division, Chugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, Japan.


Macrocyclic compounds bearing a 2-amino-6-arylpyrimidine moiety were identified as potent heat shock protein 90 (Hsp90) inhibitors by modification of 2-amino-6-aryltriazine derivative (CH5015765). We employed a macrocyclic structure as a skeleton of new inhibitors to mimic the geldanamycin-Hsp90 interactions. Among the identified inhibitors, CH5164840 showed high binding affinity for N-terminal Hsp90α (K(d)=0.52nM) and strong anti-proliferative activity against human cancer cell lines (HCT116 IC(50)=0.15μM, NCI-N87 IC(50)=0.066μM). CH5164840 displayed high oral bioavailability in mice (F=70.8%) and potent antitumor efficacy in a HCT116 human colorectal cancer xenograft model (tumor growth inhibition=83%).

Copyright © 2011 Elsevier Ltd. All rights reserved.

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