Synthesis and antiproliferative activity of some benzimidazole-4,7-dione derivatives
摘要:
A series of benzimidazole-4,7-diones bearing at the 2-position the thiomethyl group or the 2-pyridyl moiety has been synthesized and tested in vitro on three tumor cell lines. Two of them show a very good antiproliferative effect. Compounds 1 and 2d are more active or equiactive, respectively, than MMC against human lymphoblastic leukemia. Both compounds exhibit high activity on human non-Hodgkin lymphoma. Compound a is non toxic at all the concentrations used in the antiproliferative assay and 2d is toxic only at high concentration. (C) 2000 Elsevier Science Ltd. All rights reserved.
Lewis Acid Enhanced Ethene Dimerization and Alkene Isomerization—ESI-MS Identification of the Catalytically Active Pyridyldimethoxybenzimidazole Nickel(II) Hydride Species
作者:Manuel A. Escobar、Oleksandra S. Trofymchuk、Barbara E. Rodriguez、Claudia Lopez-Lira、Ricardo Tapia、Constantin Daniliuc、Heinz Berke、Fabiane M. Nachtigall、Leonardo S. Santos、Rene S. Rojas
DOI:10.1021/acscatal.5b02003
日期:2015.12.4
7-dimethoxybenzimidazole (L1) nickel precatalyst is highly selective in ethene dimerizations to 1-butene. The same catalystisomerizes 1-butene and 1-octene to internal olefins. Co-catalytic additives of B(C6F5)3 or BF3·OEt2 coordinate to the catalyst and increase the reaction rates of ethene dimerization. ESI-MS was applied identifying a [L1NiH]+ cation as the catalytically active species.
阳离子甲基烯丙基2-吡啶-4,7-二甲氧基苯并咪唑(L 1)镍预催化剂在乙烯二聚为1-丁烯中具有很高的选择性。相同的催化剂将1-丁烯和1-辛烯异构化为内烯烃。B(C 6 F 5)3或BF 3 ·OEt 2的助催化添加剂与催化剂配位并提高了乙烯二聚反应的速率。应用ESI-MS鉴定[ L 1 NiH] +阳离子为催化活性物质。
Synthesis and antifungal activity of 2,5-disubstituted-6-arylamino-4,7-benzimidazolediones
作者:Chung-Kyu Ryu、Eun-Ha Song、Ju-Yeon Shim、Hea-Jung You、Ko Un Choi、Ik Hwa Choi、Eun Young Lee、Mi Jin Chae
DOI:10.1016/s0960-894x(02)00856-9
日期:2003.1
2,5-Disubstituted-6-arylamino-4,7-benzimidazolediones were synthesized and tested for in vitro antifungal activity against pathogenic fungi. Among them, 6-arylamino-5-chloro-2-(2-pyridyl)-4,7-benzimidazolediones exhibited potent antifungal activity against Candida species and Aspergillus niger. (C) 2002 Elsevier Science Ltd. All rights reserved.