Rhodium‐Catalyzed Spirocyclic Sultam Synthesis by [3+2] Annulation with Cyclic
<i>N</i>
‐Sulfonyl Ketimines and Alkynes
作者:Lin Dong、Chuan‐Hua Qu、Ji‐Rong Huang、Wei Zhang、Qian‐Ru Zhang、Jin‐Gen Deng
DOI:10.1002/chem.201303372
日期:2013.12.2
Atom‐economical addition: RhIII‐catalyzed “Grignard‐type” cyclization between cyclic N‐sulfonyl ketimines and internal alkynes has been developed to afford multifunctional spirocyclic sultam products in high yields (up to 99 %) under mild conditions (see scheme, Cp* = pentamethylcyclopentadienyl, DCE = 1,2‐dichloroethane).
原子经济添加:已开发了在环合N-磺酰基酮亚胺和内部炔烃之间进行Rh III催化的“格里纳德型”环化反应,以在温和的条件下提供高产率(高达99%)的多功能螺环舒马胺产品(参见方案,Cp) * =五甲基环戊二烯基,DCE = 1,2-二氯乙烷)。