Synergistic Catalysis: Metal/Proton-Catalyzed Cyclization of Alkynones Toward Bicyclo[3.<i>n</i>.1]alkanones
作者:Shifa Zhu、Qiaohui Zhang、Kai Chen、Huanfeng Jiang
DOI:10.1002/anie.201504964
日期:2015.8.3
highly efficient and practical synergistically metal/proton‐catalyzed Conia–ene reaction for the synthesis of bicyclo[3.n.1]alkanones has been developed. This synergistic catalysis was successfully utilized in modifying natural compounds such as methyl dihydrojasmonate, α,β‐thujone, and 5α‐cholestan‐3‐one. Furthermore, the bridged carbonyl group of bicyclo[3.2.1]alkanones could be easily attacked by nucleophiles
已开发出一种高效且实用的协同金属/质子催化的Conia-ene反应合成双环[3.n.1]烷酮。这种协同催化作用已成功用于修饰天然化合物,例如二氢茉莉酮酸甲酯,α,β-thujone和5α-cholestan-3-one。此外,亲核试剂很容易攻击双环[3.2.1]链烷酮的桥连羰基,从而以优异的收率得到开环的环庚烯酮产物或双环[4.2.1]酰胺。这些反应提供了从简单的起始原料或天然存在的化合物快速进入各种环状结构的途径。