enantioselective synthesis of 4-aryl-3,4-dihydrocoumarins was realized through direct annulation of phenols with enals catalyzed by dihydroisoquinoline-type NHC (DHIQ-NHC), an N-heterocyclic carbene derived from l-phenylalanine. The catalytic reaction proceeds with a wide scope of electron-rich phenols and enals providing structurally diverse 4-aryl-3,4-dihydrocoumarins in good to excellent yields
通过用二氢
异喹啉型NHC(DHIQ-NHC)(一种衍生自1-苯基丙
氨酸的N杂环卡宾)催化的烯类直接环氧化
苯酚,可以实现4-芳基-3,4-二氢
香豆素的高度对映选择性合成。催化反应以多种电子富集的
酚和烯类进行,提供了结构多样的4-芳基-3,4-二氢
香豆素,具有良好的产率和对映选择性。该方法可用于从容易获得的起始原料合成
天然产物和
生物学上相关的化合物。