The [4+3] annulation reaction of crotonic acid derivative sulfur ylides with thioaurones has, for the first time, been reported using NaH as the base. A diverse array of 2,5-dihydrobenzo[4,5]thieno[3,2-b]oxepines is obtained in good to excellent yields. The proposed mechanism is investigated and supported by DFT calculations.
使用NaH作为碱,首次报道了己烯酸衍生
硫代亚甲基与
硫金酮的[4+3]环合反应。在良好至优异的产率下获得了多样的2,5-二氢苯并[4,5]
噻吩[3,2-b]氧杂
环戊二烯。拟议的机制经过DFT计算进行了研究并得到支持。