Traceless Solid-Phase Synthesis of 2,4,5-Trisubstituted Thiazoles
作者:Ill Young Lee、Young-Dae Gong、Jin Young Lee、Hye Jin Lee
DOI:10.1055/s-2005-872687
日期:——
The solid-phasesynthesis of trisubstituted thiazoles is described. The synthetic strategy involves the formation of a polymer-bound thiazole by reacting resin-bound cyanodithioimidocarbonic acid and α-bromoketone. The resin-bound thiazole was reacted with acyl chlorides or isocyanates. After oxidation-activation of a thioether linker to a sulfone linker, traceless cleavage was achieved with nucleophiles
Development of Highly Potent and Selective Diaminothiazole Inhibitors of Cyclin-Dependent Kinases
作者:Ernst Schonbrunn、Stephane Betzi、Riazul Alam、Mathew P. Martin、Andreas Becker、Huijong Han、Rawle Francis、Ramappa Chakrasali、Sudhakar Jakkaraj、Aslamuzzaman Kazi、Said M. Sebti、Christopher L. Cubitt、Anthony W. Gebhard、Lori A. Hazlehurst、Joseph S. Tash、Gunda I. Georg
DOI:10.1021/jm301234k
日期:2013.5.23
Cyclin-dependent kinases (CDKs) are serine/threonine protein kinases that act as key regulatory elements in cell cycle progression. We describe the development of highly potent diaminothiazole inhibitors of CDK2 (IC50 = 0.0009-0.0015 mu M) from a single hit compound with weak inhibitory activity (IC50 = 15 mu M), discovered by high-throughput screening. Structure-based design was performed using 35 cocrystal structures of CDK2 liganded with distinct analogues of the parent compound. The profiling of compound 51 against a panel of 339 kinases revealed high selectivity for CDKs, with preference for CDK2 and CDK5 over CDK9, CDK1, CDK4, and CDK6. Compound 51 inhibited the proliferation of 13 out of 15 cancer cell lines with IC50 values between 0.27 and 6.9 mu M, which correlated with the complete suppression of retinoblastoma phosphorylation and the onset of apoptosis. Combined, the results demonstrate the potential of this new inhibitors series for further development into CDK-specific chemical probes or therapeutics.
SYNTHESIS AND CYCLIZATION OF 1-(<i>N</i>-NITROAMIDINO)THIOUREAS TO 2,4-DIAMINOTHIAZOLES
作者:R. Binu、K. K. Thomas、G. C. Jenardanan、K. N. Rajasekharan