Convenient Synthesis of 6,7,12,13-Tetrahydro-5H-Cyclohepta[2,1-b:3,4-b’]diindole Derivatives Mediated by Hypervalent Iodine (III) Reagent
作者:Lei Peng、Xiaofei Zhang、Chunhao Yang
DOI:10.3390/molecules24050960
日期:——
13-tetrahydro-5H-cyclohepta[2,1-b:3,4-b’]diindoles have received little attention. Only two methods have been developed for the construction of the 6,7,12,13-tetrahydro-5H-cyclohepta[2,1-b:3,4-b’]diindole scaffold thus far, including the classical Fischer indole synthesis conducted by reacting indole-fused cycloheptanone and hydrazines, and the condensation reaction to build the seven-membered ring. Here, we report
双吲哚基生物碱是一大类天然和合成产品,具有多种生物活性。在双吲哚类化合物中,6,7,12,13-四氢-5H-环庚烷[2,1-b:3,4-b']二吲哚类化合物鲜为人知。迄今为止,仅开发了两种方法来构建 6,7,12,13-四氢-5H-环庚 [2,1-b:3,4-b'] 二吲哚支架,包括经典的 Fischer 吲哚合成通过吲哚稠合环庚酮和肼反应,以及缩合反应构建七元环。在这里,我们首次报道了一种通过 1,3- 分子内氧化偶联合成 6,7,12,13-四氢-5H-环庚 [2,1-b:3,4-b'] 二吲哚的新途径。二(1H-吲哚-3-基)丙烷在 PIFA、DDQ 和 TMSCl 存在下具有中等至优异的产率。