developed. The strategy relies on two types of 6-exo-trig cyclization of 3-substituted indole substrates. Enantioselective domino Friedel–Crafts-type reactions leading to THCAs can be catalyzed by chiral phosphoric acid derivatives (with up to >99% ee), and the first examples of exocyclic Pictet–Spengler reactions to form THCAs are reported.
已经开发了合成手性四氢
咔唑(THCA)的合成策略。该策略依赖于3-取代的
吲哚底物的两种类型的6 -exo-trig环化。手性
磷酸衍
生物(ee含量高达99%以上)可以催化导致THCA的对映选择性多米诺弗里德-克拉夫特型反应,并且报道了形成THCA的环外Pictet-Spengler反应的第一个实例。