NBS-mediated sequential one-pot synthesis of multifunctionalized thiazoles and thiophenes from 1,3-dicarbonyl compounds and mercaptonitrile salts
作者:Laichun Luo、Lanlan Meng、Qi Sun、Zemei Ge、Runtao Li
DOI:10.1016/j.tetlet.2013.11.014
日期:2014.1
A NBS-mediated sequential one-pot synthesis of multifunctionalized thiazoles and thiophenes from 1,3-dicarbonyl compounds and mercaptonitrile salts has been developed under mild conditions. This transformation involves sequential bromination/SN2 alkylation/Thorpe–Zieglercyclization/regio-selective elimination of a –COR group, affording the desired products in moderate to good yields. The sequence
由NBS介导的从1,3-二羰基化合物和硫醇腈盐开始的多官能噻唑和噻吩的顺序一锅法合成已经在温和的条件下进行。该转化涉及顺序溴化/ S N 2烷基化/索普-齐格勒环化/ -COR基团的区域选择性消除,以中等至良好的收率提供所需的产物。确定了-COR基团离去反应的顺序,并提出了可能的机制。
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.
Reagents for new heteroannelation reactions III. 2-(Methylthio)-2-thiazoline
作者:F. Sauter、J. Fr�hlich、A. Z. M. S. Chowdhury、C. Hametner
DOI:10.1007/bf00806858
日期:1997.5
A variety of partly novel tri- and tetracyclic hetero systems were obtained by reaction of heteroaromatic 2-aminoesters with 2-(methylthio)-2-thiazoline, yielding double-annelation of a thiazolo[2,3-b]pyrimido moiety in a one-pot process.
Froehlich, Johannes; Sauter, Fritz; Chowdhury, A. Z. M. Shaifullah, Scientia Pharmaceutica, 1997, vol. 65, # 3, p. 83 - 92
作者:Froehlich, Johannes、Sauter, Fritz、Chowdhury, A. Z. M. Shaifullah、Hametner, Christian