It is an object of the present invention to provide 2-iminocarboxylic acid derivatives, and a practically suitable industrial method for producing benzazepinones in a short process under mild conditions. The present invention provides a method for producing a benzazepinone or a salt thereof, which comprises opening a ring of an isoquinoline derivative and subsequently converting the thus generated amine into a benzazepinone through lactamization reaction.
Concise total syntheses of berberine and its analogues enabled by trifluoroacetic anhydride-promoted decarbonylative-elimination reaction
作者:Xifei Yan、Jianfeng Zheng、Wei-Dong Z. Li
DOI:10.1016/j.tetlet.2023.154826
日期:2023.11
The total syntheses of berberine hydrochloride and itsanalogues were achieved by a convergent strategy from available meconine derivatives, which were based on base mediated isoquinoline annulation followed by trifluoroacetic anhydride promoted decarbonylative elimination protocol. Key elements of our approach feature divergent synthesis, step-economy manner, multigram scalable synthesis, transition