Gold-Catalyzed Synthesis of Oxygen- and Nitrogen-Containing Heterocycles from Alkynyl Ethers: Application to the Total Synthesis of Andrachcinidine
作者:Hyung Hoon Jung、Paul E. Floreancig
DOI:10.1021/jo071225w
日期:2007.9.1
containing pendent oxygen or nitrogen nucleophiles react with electrophilic gold catalysts in the presence of water to form saturated heterocyclic ketones. Mechanistic studies demonstrated that the reactions proceed through a sequence of alkyne hydration, alkoxy group elimination, and intramolecular conjugate addition. Diastereoselectivities for tetrahydropyran and piperidine formation are very good to
在本文中,我们报道了含有悬垂的氧或氮亲核试剂的均丙基醚在水的存在下与亲金催化剂反应形成饱和的杂环酮。机理研究表明,反应通过炔烃水合,烷氧基基团消除和分子内共轭物加成的顺序进行。四氢吡喃和哌啶形成的非对映选择性非常好。该方法已经应用于天然产物和拉西替尼的有效全合成。使用炔丙基醚底物而不是均炔丙基醚会促进内部炔烃的区域选择性水合,从而扩大了可通过该协议访问的产品范围。