Davies, Nicholas G. M. published the artcileTargeting conserved water molecules: Design of 4-aryl-5-cyanopyrrolo[2,3-d]pyrimidine Hsp90 inhibitors using fragment-based screening and structure-based optimization, Safety of 4-Chloro-2-methylphenylboronic acid, the publication is Bioorganic & Medicinal Chemistry (2012), 20(22), 6770-6789, database is CAplus and MEDLINE.
Inhibitors of the Hsp90 mol. chaperone are showing promise as anti-cancer agents. Here the authors describe a series of 4-aryl-5-cyanopyrrolo[2,3-d]pyrimidine ATP competitive Hsp90 inhibitors that were identified following structure-driven optimization of purine hits revealed by NMR based screening of a proprietary fragment library. Ligand-Hsp90 x-ray structures combined with mol. modeling led to the rational displacement of a conserved water mol. leading to enhanced affinity for Hsp90 as measured by fluorescence polarization, isothermal titration calorimetry and surface plasmon resonance assays. This displacement was achieved with a nitrile group, presenting an example of efficient gain in binding affinity with minimal increase in mol. weight Some compounds in this chem. series inhibit the proliferation of human cancer cell lines in vitro and cause depletion of oncogenic Hsp90 client proteins and concomitant elevation of the co-chaperone Hsp70. In addition, one compound was demonstrated to be orally bioavailable in the mouse. This work demonstrates the power of structure-based design for the rapid evolution of potent Hsp90 inhibitors and the importance of considering conserved water mols. in drug design.
Bioorganic & Medicinal Chemistry published new progress about 209919-30-2. 209919-30-2 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Boronic Acids,Boronic acid and ester, name is 4-Chloro-2-methylphenylboronic acid, and the molecular formula is C7H8BClO2, Safety of 4-Chloro-2-methylphenylboronic acid.
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