Aldehyde Addition to 1,3-Butadiyne-Derived Zirconacyclocumulenes: Stereoselective Synthesis of <i>cis</i>-[3]Cumulenols
作者:Xiaoping Fu、Yuanhong Liu、Yuxue Li
DOI:10.1021/om100287d
日期:2010.7.12
1,3-butadiynes is achieved cleanly under controlled reaction conditions, which provids a highly stereoselective method for the synthesis of tetra-substituted [3]cumulenols. DFT calculations suggest that there is an equilibrium between seven-membered zirconacyclocumulene (3) and the less stable but more reactive five-membered α-alkynylzirconaindene (2) in the process. The aldehyde reacts with the five-membered
在受控的反应条件下,可以很干净地将醛直接加到通过苯并锆茂茂与1,3-丁二炔的偶合反应生成的氧化锆环枯烯中,为合成四取代的[3]枯烯醇提供了高度立体选择性的方法。DFT计算表明,在此过程中,七元氧化锆环枯烯(3)与较不稳定但反应性更高的五元α-炔基氧化锆茚(2)之间存在平衡。醛通过环状S E 2'途径与五元氧化锆茚中间体反应,水解后得到枯草烯醇产物。