作者:Matthew Del Bel、Alexander Rovira、Carlos A. Guerrero
DOI:10.1021/ja4054866
日期:2013.8.21
(1) as a bifunctional reagent. The enol silane and stabilized diazoalkane functionalities are exploited independently in sequential Mukaiyama-Michael and diastereoselective α,α'-diketone coupling. Di-, tri-, and tetrasubstituted enones are amenable to annulation under this protocol. Overall, this chemistry is an effective surrogate for a substituted "acetone 1,3-dipole".
在此,我们描述了一种使用 3-(叔丁基二甲基甲硅烷氧基)-2-重氮-3-丁烯酸甲酯 (1) 作为双功能试剂对共轭烯酮进行环戊环化的两步法。烯醇硅烷和稳定的重氮烷官能团在连续 Mukaiyama-Michael 和非对映选择性 α,α'-二酮偶联中独立开发。根据本协议,二、三和四取代的烯酮适用于环化。总的来说,这种化学反应是取代的“丙酮 1,3-偶极子”的有效替代物。