Various functionalised 4-amino-2-(methylthio)quinolines are synthesised through triflic acid-mediated N-heteroannulation of α-functionalized-β-anilino-β-(methylthio)acrylonitriles for the first time. The N-heteroannulation process is highly chemoselective and has mild reaction conditions. However, this process fails in the absence of the β-methylthio group in the acrylonitriles. In addition, a new
首次通过三氟甲磺酸介导的α-功能化-β-苯胺基-β-(甲硫基)丙烯腈的N-杂环化合成了各种功能化的4-氨基-2-(甲硫基)喹啉。N-杂环化过程具有高度的化学选择性并且具有温和的反应条件。然而,该方法在丙烯腈中不存在 β-甲硫基的情况下失败。此外,还证明了一种新的双 N-杂环化工艺可以从非杂环前体合成吲哚[3,2- c ]喹啉。天然产物异隐脑油由无环前体分四步合成。