series of N-sulfonyl-aminobiaryl derivatives have been examined as novel antitubulinagents. Compound 21 [N-(4′-cyano-3′-fluoro-biphenyl-2-yl)-4-methoxy-benzenesulfonamide] exhibits remarkable antiproliferative activity against four cancer cell lines (pancreatic AsPC-1, lung A549, liver Hep3B, and prostate PC-3) with a mean GI50 value of 57.5 nM. Additional assays reveal that 21 inhibits not only tubulin
Synthesis of nitrodienes, nitrostyrenes, and nitrobiaryls through palladium-catalyzed couplings of β-nitrovinyl and o-nitroaryl thioethers
作者:Gardner S. Creech、Ohyun Kwon
DOI:10.1039/c3sc50773d
日期:——
A highly efficient, base-free, mild protocol for the palladium-catalyzed, copper-activated desulfitative couplings of vinyl and aryl β-nitrothioethers generates a wide variety of conjugated nitroorganics. Orthogonality to traditional SuzukiâMiyaura coupling is demonstrated, as well as synthetic utility, through reductive Cadogan cyclization, for the formation of indoles, carbazoles, and pyrroles.
compounds with widespread applications in many fields. Tetramethylammonium fluoride tetrahydrate was found to promote the biaryl coupling of aryl iodides bearing electron-withdrawing substituents with unactivated arenes. The reaction takes place at temperatures between 100 and 150°C and can be applied to a wide range of aromatic and heteroaromatic rings, affording the products in moderate to high yields.
Pd-catalyzed decarboxylative couplings of arenecarboxylic acids with aryl iodides
作者:Zhiyong Wang、Qiuping Ding、Xiaodan He、Jie Wu
DOI:10.1016/j.tet.2009.04.047
日期:2009.6
The combination of palladium chloride with BINAP shows high efficiency in the decarboxylative cross-coupling reactions of arenecarboxylic acids with aryl iodides. The reactions proceed smoothly to generate the corresponding biaryl compounds in good to excellent yields. (C) 2009 Elsevier Ltd. All rights reserved.
765. Synthesis of certain trifluoromethyldiphenyl derivatives