Synthesis and in vitro antiproliferative activity of C5-benzyl substituted 2-amino-pyrrolo[2,3-d]pyrimidines as potent Hsp90 inhibitors.
Lee, J.H., Shin, S.C., Seo, S.H., Seo, Y.H., Jeong, N., Kim, C.W., Kim, E.E., Keum, G.(2017) Bioorg Med Chem Lett 27: 237-241
- PubMed: 27914802 
- DOI: https://doi.org/10.1016/j.bmcl.2016.11.062
- Primary Citation of Related Structures:  
5H22 - PubMed Abstract: 
A novel series of heat shock protein 90 (Hsp90) inhibitors was identified by X-ray crystal analysis of complex structures at solvent-exposed exit pocket C. The 2-amino-pyrrolo[2,3-d]pyrimidine derivatives, 7-deazapurines substituted with a benzyl moiety at C5, showed potent Hsp90 inhibition and broad-spectrum antiproliferative activity against NCI-60 cancer cell lines. The most potent compound, 6a, inhibited Hsp90 with an IC 50 of 36nM and showed a submicromolar mean GI 50 value against NCI-60 cell lines. The interaction of 6a at the ATP-binding pocket of Hsp90 was confirmed by X-ray crystallography and Western blot analysis.
Organizational Affiliation: 
Center for Neuro-Medicine, Korea Institute of Science and Technology (KIST), Hwarangro 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea; Department of Chemistry, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea.