A new method to reduce cyclobutenediones towards 4-hydroxy-2-cyclobutenones was established. The latter compounds gave rise to new 5-halo-2(5H)-furanones by reaction with halogenating agents via a cationic ring-opening-ring-closure mechanism.
建立了一种将
环丁烯二酮还原为
4-羟基-2-
环丁烯酮的新方法。后一种化合物通过阳离子开环闭环机制与卤化剂反应产生新的 5-卤代-
2(5H)-呋喃酮。