Synthesis of 2-(1-Phenylvinyl)benzofurans and 2-(1-Phenylvinyl)indoles as Antimitotic Agents by a Tandem Palladium-Assisted Coupling-Cyclization Reaction between 1-Phenylvinyl Iodides and ortho-Substituted Arylalkynes
作者:Bret Tréguier、Evelia Rasolofonjatovo、Abdallah Hamze、Olivier Provot、Joanna Wdzieczak-Bakala、Joëlle Dubois、Jean-Daniel Brion、Mouad Alami
DOI:10.1002/ejoc.201100540
日期:2011.7.18
1-phenylvinyl iodides and silylated alkynes in a one-pot reaction. After a desilylation step, the Sonogashira coupling reaction between the resulting terminal alkynes and 1-phenylvinyliodide derivatives 6 gave enyne intermediates, which underwent a 5-endo-dig cyclization to afford 2-(1-phenylvinyl) heterocycles 2 and 3 in good yields. This method provides a rapid and efficient approach to build up
一系列功能化的 2-(1-苯基乙烯基) 苯并呋喃 2 和 2-(1-苯基乙烯基) 吲哚 3 是由 1-苯基碘化物和硅烷化炔烃在一锅反应中制备的。在脱甲硅烷基化步骤之后,所得末端炔烃和 1-苯基乙烯基碘衍生物 6 之间的 Sonogashira 偶联反应得到烯炔中间体,该中间体经过 5-endo-dig 环化,以良好的收率得到 2-(1-苯基乙烯基)杂环 2 和 3。该方法提供了一种快速有效的方法来建立具有生物学意义的基于苯并杂环的异康布他汀 A-4 类似物。在这一系列化合物中,吲哚 3o 和 3r 以微摩尔水平抑制微管蛋白组装,与 isoCA-4 相当。