Tandem Multicomponent Reactions Toward the Design and Synthesis of Novel Antibacterial and Cytotoxic Motifs
作者:Mohammad Semreen、Raafat El-Awady、Raed Abu-Odeh、Maha Saber-Ayad、Raed Al-Qawasmeh、Salem Chouaib、Wolfgang Voelter、Taleb Al-Tel
DOI:10.2174/0929867311320110007
日期:2013.3.1
The synthesis of polysubstituted imidazopyridines and imidazopyrazines through the orthogonal union of
Groebke-Blackburn and Ugi reactions is described. These motifs were produced efficiently in a tandem operation without
intermediate isolation. The synthesized scaffolds were biologically evaluated and found to posses potent anticancer and
antibacterial activities. Importantly, some of these motifs (e.g. compound 5) were found to possess specific anti-breast
cancer activity against MCF7 cell line and others (e.g. compound 15) possess specific effects against melanoma cancer
cell line (M8). Interestingly, the introduction of imidazobenzothiazole framework produced compounds with potent anticancer
activities (e.g. compounds 29 and 33) in vitro. Interestingly, many of synthesized compounds displayed potent and
broad spectrum antibacterial activity against hospital-resistant clinical isolates namely, Escherichia coli, Klebsiella
pneuomoniae, Staph. epidermidis, Ps. aeruginosa and Proteus vulgaris. Furthermore, many of the synthesized motifs
were found to effective against Gram positive methicillin-sensitive Staphylococcus aureus (MMSA; ATCC 25923), and
methicillin-resistant Staphylococcus aureus (MRSA; ATCC 35591). These findings, however, form the foundation for
further investigation in our continuing efforts to develop selective anticancer and antibacterial agents.
本文介绍了通过格罗伯克-布莱克本反应和乌基反应的正交结合合成多取代咪唑并吡啶和咪唑并吡嗪的过程。这些基团是在串联操作中高效生成的,无需分离中间体。对合成的支架进行了生物评估,发现它们具有很强的抗癌和抗菌活性。重要的是,其中一些基架(如化合物 5)对 MCF7 细胞株具有特异性抗乳腺癌活性,而其他基架(如化合物 15)则对黑色素瘤细胞株(M8)具有特异性作用。有趣的是,引入咪唑苯并噻唑框架的化合物(如化合物 29 和 33)在体外具有很强的抗癌活性。有趣的是,合成的许多化合物对医院耐药临床分离菌(即大肠埃希菌、肺炎克雷伯菌、表皮葡萄球菌、铜绿假单胞菌和普通变形杆菌)具有强效和广谱的抗菌活性。此外,还发现许多合成图案对革兰氏阳性甲氧西林敏感金黄色葡萄球菌(MMSA;ATCC 25923)和耐甲氧西林金黄色葡萄球菌(MRSA;ATCC 35591)有效。不过,这些发现为我们进一步研究开发选择性抗癌和抗菌药物奠定了基础。