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Electrocatalytic [3 + 2] Annulation for the Synthesis of Polysubstituted Furans.

Ming ChenJian WangYuanmeng KanXiaoni JiaBinbin HuangTing LiXinxin Zhao
Published in: Organic letters (2023)
In this report we describe an atom-economic, practical strategy for the synthesis of tri/tetra-substituted furans through electrochemical [3 + 2] annulation between alkynes and β-keto compounds with ferrocene (Fc) as the catalyst. This protocol features the use of a graphite felt (GF) anode and a stainless steel (SST) cathode, mild conditions, and excellent tolerance with various alkynes and β-keto compounds. Additionally, the application of this method is highlighted by the late-stage functionalization of complex structures and a gram-scale experiment.
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