The Synthesis, Antileukemic Activity, and Crystal Structures of Indirubin Derivatives
作者:Chunmin Li、Yunhong Go、Zihua Mao、Kazuo Koyano、Yasushi Kai、Nobuko Kanehisa、Qingtai Zhu、Zhonghua Zhou、Souyu Wu
DOI:10.1246/bcsj.69.1621
日期:1996.6
In order to search for a new kind of antileukemic drug, we synthesized four indirubin derivatives, including indirubin monooxime (IM), indirubin monooxime O-methyl ether (IMME), N1-methylindirubin monooxime O-methyl ether (MIMME), and indirubin monooxime O-ethyl ether (IMEE). Their antileukemic activities in vivo and in vitro were tested; some of these compounds showed good activities. Their molecular and crystal structures were determined by an X-ray diffraction method. The results revealed that all four indirubin derivatives are planar, and have a tendency to form a big π-system. The molecular structures also showed that oximation of indirubin resulted in only a slight change in the antileukemic activity. On the other hand, the amido moiety in the compounds may play an important role in the activity of the indirubin monooxime derivatives. This conclusion was supported by the calculation results of the electrostatic-potential (esp) derived charge distribution of the indirubin derivatives, which were obtained using an ab initio molecular orbital of the basis set (3-21G), taking the electronic correlation into account at the MP2 level.
为了研究新型抗白血病药物,我们合成了四种靛红衍生物,包括靛红单肟(IM)、靛红单肟O-甲醚(IMME)、N1-甲基靛红单肟O-甲醚(MIMME)和靛红单肟O-乙醚(IMEE)。对这些化合物进行了体内和体外抗白血病活性测试,其中一些化合物表现出良好的活性。通过X射线衍射方法确定了它们的分子结构和晶体结构。结果表明,这四种靛红衍生物都呈平面结构,且倾向于形成大的π体系。分子结构还表明,靛红的肟化作用对抗白血病活性只产生轻微影响。另一方面,化合物中的酰胺基团可能在靛红单肟衍生物的活性中起重要作用。这一结论得到了靛红衍生物静电势(esp)衍生电荷分布计算结果的支持,该计算采用从头计算分子轨道基组(3-21G),在MP2水平考虑了电子相关性。