7‘-Substituted Benzothiazolothio- and Pyridinothiazolothio-Purines as Potent Heat Shock Protein 90 Inhibitors
作者:Lin Zhang、Junhua Fan、Khang Vu、Kevin Hong、Jean-Yves Le Brazidec、Jiandong Shi、Marco Biamonte、David J. Busch、Rachel E. Lough、Roy Grecko、Yingqing Ran、John L. Sensintaffar、Adeela Kamal、Karen Lundgren、Francis J. Burrows、Robert Mansfield、Gregg A. Timony、Edgar H. Ulm、Srinivas R. Kasibhatla、Marcus F. Boehm
DOI:10.1021/jm051146h
日期:2006.8.1
We report on the discovery of benzo- and pyridino-thiazolothiopurines as potent heat shock protein 90 inhibitors. The benzothiazole moiety is exceptionally sensitive to substitutions on the aromatic ring with a 7'-substituent essential for activity. Some of these compounds exhibit low nanomolar inhibition activity in a Her-2 degradation assay (28-150 nM), good aqueous solubility, and oral bioavailability profiles in mice. In vivo efficacy experiments demonstrate that compounds of this class inhibit tumor growth in an N87 human colon cancer xenograft model via oral administration as shown with compound 37 (8-(7-chlorobenzothiazol-2- ylsulfanyl)-9-(2-cyclopropylamino-ethyl)-9H-purin-6-ylamine).
8-Bromo-9-alkyl adenine derivatives as tools for developing new adenosine A2A and A2B receptors ligands
作者:Catia Lambertucci、Ippolito Antonini、Michela Buccioni、Diego Dal Ben、Dhuldeo D. Kachare、Rosaria Volpini、Karl-Norbert Klotz、Gloria Cristalli
DOI:10.1016/j.bmc.2009.02.030
日期:2009.4
Importance of making available selective adenosine receptor antagonists is boosted by recent findings of adenosine involvement in many CNS dysfunctions. In the present work a series of 8-bromo-9-alkyl adenines are prepared and fully characterized in radioligand binding assays or functional cyclase experiments in respect to their interaction with all the four adenosine receptor subtypes. Results show that the presence of the bromine atom in 8-position of 9-substituted adenines promotes in general the interaction with the adenosine receptors, in particular at the A(2A) subtype. The present study also demonstrates that adenine derivatives could be a good starting point to obtain selective adenosine A(2B) receptor antagonists. (c) 2009 Elsevier Ltd. All rights reserved.
8-(2-Furyl)adenine derivatives as A2A adenosine receptor ligands
8-(2-furyl)adenine derivatives are reported. Results show that 8-(2-furyl)-9-methyladenine is endowed with high affinity at the A2A subtype. Further modification of this compound with introduction of arylacetyl or arylcarbamoyl groups in N6-position takes to different effects on the A2A affinity and in particular on the selectivity versus the other three adenosine receptor subtypes. A molecular modelling