Highly Efficient Synthesis of <i>cis</i>-[3]Cumulenic Diols via Zirconocene-Mediated Coupling of 1,3-Butadiynes with Aldehydes
作者:Xiaoping Fu、Shasha Yu、Guoqin Fan、Yuanhong Liu、Yuxue Li
DOI:10.1021/om201125z
日期:2012.1.23
A highly efficient and convenient method for the monozirconation of silyl- or tert-butyl-substituted 1,3-butadiynes using the Negishi reagent has been developed. The resulting zirconium butadiyne complexes undergo two syn-SE2′ reactions with various aldehydes to yield the cis-[3]cumulenic diols with moderate to high diastereoselectivities. The silyl substituents at the butadiyne terminus show remarkable
已经开发出使用Negishi试剂的甲硅烷基-或叔丁基-取代的1,3-丁二炔单锆化的高效且方便的方法。所得的丁二烯锆配合物与各种醛进行两个syn-S E 2'反应,生成具有中等至高非对映选择性的顺式-[3]枯烯二醇。丁二炔末端的甲硅烷基取代基对非对映选择性具有显着影响。