The total synthesis of the alkaloid (â)-chaetominine (1) has been achieved in four steps with an overall yield of 33.4%. Key features of our strategy include a one-pot cascade indole epoxidation â epoxide ring-opening cyclization â lactamization reaction sequence, and the use of a nitro group as a latent amino group for the one-pot construction of the quinazolinone ring. This constitutes a step economical, redox economical and protecting group-free total synthesis.
我们通过四个步骤完成了
生物碱(â)-查托米宁(1)的全合成,总收率为33.4%。我们的策略的主要特点包括:一锅级联
吲哚环氧化-
环氧化物开环-内酰胺化反应顺序,以及使用硝基作为潜伏
氨基,一锅构建
喹唑啉酮环。这是一种步骤经济、氧化还原经济且不含保护基的全合成方法。