Palladium-Catalyzed One-Pot Highly Regioselective 6-<i>Endo</i> Cyclization and Alkylation of Enynoates: Synthesis of 2-Alkanone Pyrones
作者:Tanveer Ahmad、Sheng-Qi Qiu、Yun-He Xu、Teck-Peng Loh
DOI:10.1021/acs.joc.8b02198
日期:2018.11.2
The Pd(II)-catalyzed one-pot tandem cyclization/alkylation reactions of enynoates with allylic alcohols have been demonstrated. In this reaction, an innovative protocol proceeded well through Pd-catalyzed intramolecular selective 6-endo cyclization, insertion of allylic alcohols into the Pd–C bond of vinylpalladium species generated in situ, and β-hydrogen elimination processes. This conversion provides
烯醇与烯丙基醇的Pd(II)催化一锅串联串联环化/烷基化反应已得到证明。在该反应中,一种创新的协议,通过进行公Pd催化的分子内选择性6-内环化,烯丙基醇成原位生成的vinylpalladium物种,和β氢消除过程的的Pd-C键的插入。该转化为中等产率至良好产率的2-链烷酮吡喃酮的合成提供了方便而有效的方法。