合成了一系列含有取代查耳酮作为接头的双氢青蒿素 (DHA) 单体和二聚体衍生物,并研究了它们在人类癌细胞系 HL-60(白血病)、Mia PaCa-2(胰腺癌)、PC-3 中的细胞毒性(前列腺癌)、LS180(结肠癌)和 HEPG2(肝细胞癌)。在测试的细胞系中,这些衍生物中的一些具有比母体化合物 DHA 更大的抗增殖和细胞毒性作用。所有化合物的结构均经IR、1 H NMR和质谱数据证实。在新衍生物中,化合物8、14、15、20和24被发现对测试的人类癌细胞系比亲本 DHA 更活跃。发现 DHA 衍生物在人类白血病细胞系中最活跃,化合物8、14、15、20和24在48小时内的IC 50值小于 1 μM,而 DHA 在同一时间段的 IC 50值为2 μM 。该系列中最有效的化合物8的 IC 50 = 0.3 μM(与多柔比星相当(IC 50 = 0.3 μM))和15的 IC 50 =
Microwave-Accelerated SPOT-Synthesis on Cellulose Supports
作者:Matthew D. Bowman、Ryan C. Jeske、Helen E. Blackwell
DOI:10.1021/ol049313f
日期:2004.6.1
demonstrate that microwave irradiation can dramatically accelerate reaction rates for spatially addressable librarysynthesis on planar membrane supports. The development of a robust support/linker system, microwave-assistedsynthesis of small molecule test libraries, and methods for solid-phase scale-up on cellulose are described.
Solid-phase synthesis of a parallel library of 3'-hydroxy-2,3-dihydrobenzothiazepines has been carried out through [4+3] annulation of alpha,beta-unsaturated ketones with aminothiophenol, using Wang resin as solid support. The synthesized compounds were evaluated for their potential as antibacterial, tumor inhibitors as well as acetyl- and butyrylcholinesterase inhibitors. None of the compounds showed any significant antibacterial activity. However, quite a few compounds showed significant potential as crown gall tumor inhibitors. These results reflect a strong exploratory potential in search of new benzothiazepines as source of anticancer agents. The results of the inhibition of cholinesterase revealed that benzothiazepines have a greater potential as butyrylcholinesterase inhibitors as compared to acetylcholinesterase. Moreover, the substitution of hydroxy group at C-3 in ring A led to increased activity when compared to unsubstituted- and 2'-OH substituted benzothiazepines. (C) 2008 Elsevier Ltd. All rights reserved.
Synthesis and evaluation of hydroxychalcones as multifunctional non-purine xanthine oxidase inhibitors for the treatment of hyperuricemia
作者:Zhaodi Xie、Xiaoting Luo、Zhuan Zou、Xiao Zhang、Feifei Huang、Ruishan Li、Shijie Liao、Yun Liu
DOI:10.1016/j.bmcl.2017.01.053
日期:2017.8
A series of hydroxychalcone derivatives have been designed, synthesized and evaluated for human xanthine oxidase (XO) inhibitory activity. Most of the tested compounds acted moderate XO inhibition with IC50 values in the micromolar rang. Molecular docking and kinetic studies have been performed to explain the binding modes of XO with the selected compounds. In addition, in vitro antioxidant screening results indicated that some of the hydroxychalcones possessed good anti-free radical activities. Furthermore, the preferred compounds 16 and 18 were able to significantly inhibit hepatic xanthine oxidase activity and reduced serum uric acid level of hyperuricemic mice in vivo. In summary, compounds 16 and 18 with balanced activities of antioxidant, XO inhibition and serum uric acid reduction, which are promising candidates for the treatment of hyperuricemia and gout. (C) 2017 Elsevier Ltd. All rights reserved.