Photocatalytic Enantioselective Radical Cascade Multicomponent Minisci Reaction of -Carbolines Using Diazo Compounds as Radical Precursors

Here, a photocatalytic asymmetric multicomponent cascade Minisci reaction of beta-carbolines with enamides and diazo compounds is reported, enabling an effective enantioselective radical CH functionalization of beta-carbolines with high yields and enantioselectivity (up to 83% yield and 95% ee). This enantioselective multicomponent Minisci protocol exhibits step economy, high chemo-/enantio-selective control, and good functional group tolerance, allowing access to a variety of valuable chiral beta-carbolines. Notably, diazo compounds are suitable radical precursors in enantioselective cascade radical reactions. Moreover, the efficiency and practicality of this approach are demonstrated by the asymmetric synthesis of bioactive compounds and natural products. The study presents a photocatalytic asymmetric cascade Minisci reaction of beta-carbolines with enamides and diazo compounds, allowing for effective enantioselective radical CH functionalization of beta-carbolines with high yields and enantioselectivity (up to 83% yield and 95% ee). The effectiveness and viability of this strategy are demonstrated through the asymmetric synthesis of bioactive compounds and natural product. image