Copper Salt‐Controlled Divergent Reactivity of [Cu]CF 2 PO(OEt) 2 with α‐Diazocarbonyl Derivatives

Herein, we report a copper salt‐controlled divergent reactivity toward α‐diazocarbonyl compounds. By a simple change of the copper counteranion under identical reaction conditions, the reported method allowed an easy access to either ( Z )‐α‐fluorovinylphosphonate or alkyl‐SCF 2 PO(OEt) 2 derivatives in good yields. Mechanistic studies were performed and suggested two different pathways to explain the formation of these products.