to react with organocuprate reagents and undergo cyclization followed by dehydration to give substituted furans as the final products. The transformation appeared to be versatile, and tri- and tetra-substituted furans were obtained with regiochemical control in moderate to good yields. The best yields were generally obtained when the reactions were performed around −60 °C with substrates and cuprates
已经显示出β-酰氧基α,β-不饱和炔属酮与
有机铜试剂反应并进行环化,然后脱
水以得到取代的
呋喃作为最终产物。该转化似乎是多用途的,并且在区域
化学控制下以中等至良好的产率获得了三和四取代的
呋喃。当反应在-60°C左右与含有空间需求取代基的底物和
铜酸盐进行反应时,通常可获得最佳收率。所提出的
呋喃形成机理已得到实验的支持。