Vitamin Catalysis: Direct, Photocatalytic Synthesis of Benzocoumarins via (−)-Riboflavin-Mediated Electron Transfer
作者:Tobias Morack、Jan B. Metternich、Ryan Gilmour
DOI:10.1021/acs.orglett.8b00052
日期:2018.3.2
photoactivated (−)-riboflavin (vitamin B2) to generate the heterocyclic core via photoinduced single electron transfer. Collectively, the inexpensive nature of the catalyst, ease of execution, and absence of external metal additives are a convincing endorsement for the incorporation of simple vitamins in contemporary catalysis.
公开了一种操作简单的方案,以促进直接从联芳基羧酸进入苯并-3,4-香豆素,而无需底物预官能化。作为经典内酯化策略的补充,这种分离依赖于光活化的(-)-核黄素(维生素B 2)的氧化能力,可通过光诱导的单电子转移生成杂环核。总的来说,催化剂的廉价性质,易于实施以及不存在外部金属添加剂,都令人信服地赞同将简单的维生素掺入现代催化剂中。