Practical synthesis of the rebeccamycin aglycone and related analogs by oxidative cyclization of bisindolylmaleimides with a Wacker-type catalytic system
作者:Jianji Wang、Miguel Rosingana、Daniel J Watson、Eric D Dowdy、Robert P Discordia、Nachimuthu Soundarajan、Wen-Sen Li
DOI:10.1016/s0040-4039(01)02021-4
日期:2001.12
Using atmospheric O2 as the stoichiometric oxidant, Pd2+/Cu2+-catalyzed oxidative cyclization of the corresponding bisindolylmaleimides provides the rebeccamycin aglycone and related indolo[2,3-a]pyrrolo[3,4-c]carbazoles in 58–88% yield. The method is operationally simple and utilizes readily prepared substrates, making the process amenable to scaleup.
利用大气Ò 2作为化学计量的氧化剂,钯2+ / Cu的2+催化的氧化相应bisindolylmaleimides的环化提供了利拜卡霉素糖苷配基和相关的吲哚并[2,3-一个]吡咯并[3,4- c ^ ]在58-咔唑产率88%。该方法操作简单,并且利用容易制备的基材,使得该方法适合规模化生产。