A method has been devised for the microwave-assisted, continuous-flow preparation of indole alkaloids by a two-step aryl amination/cross-coupling sequence of bromoalkenes and 2-bromoanilines. This process requires both the presence of a metal-lined flow tube (a 1180 micron capillary) and the Pd PEPPSI-IPr catalyst; without either, the catalyst or the film, there is zero turnover of this catalytic process
已经设计了一种通过
溴代烯烃和
2-溴苯胺的两步芳基胺化/交叉偶联序列来微波辅助,连续流制备
吲哚生物碱的方法。该过程既需要
金属衬里的流管(1180微米毛细管),也需要Pd PEPPSI-IPr催化剂。如果没有催化剂或膜,则该催化过程的周转率为零。已显示
银膜可提供一定的转化率(48%至62%),但是通过使用高度多孔的
钯膜,可以在各种
溴代烯烃和
溴代
苯胺上获得最佳结果(定量)。考虑了Pd膜的可能作用,以及催化剂和膜之间的相互作用。