Basic Ionic Liquid as Catalysis and Reaction Medium: A Novel and Green Protocol for the Markovnikov Addition of <i>N</i>-Heterocycles to Vinyl Esters, Using a Task-Specific Ionic Liquid, [bmIm]OH
作者:Jian-Ming Xu、Bo-Kai Liu、Wei-Bo Wu、Chao Qian、Qi Wu、Xian-Fu Lin
DOI:10.1021/jo0600914
日期:2006.5.1
A basicionicliquid, 1-methyl-3-butylimidazolium hydroxide ([bmIm]OH), has been introduced as a catalyst and reactionmedium for the Markovnikov addition of N-heterocycles to vinyl esters under mild conditions. The evidence for the role of this basicionicliquid [bmIm]OH in promoting the Markovnikov addition has been given. On the basis of the evidence, a mechanism was postulated.
Promiscuous Acylases-Catalyzed Markovnikov Addition of N-Heterocycles to Vinyl Esters in Organic Media
作者:Wei-Bo Wu、Jian-Ming Xu、Qi Wu、De-Shui Lv、Xian-Fu Lin
DOI:10.1002/adsc.200505342
日期:2006.3
the catalysis of these promiscuous acylases, a number of N-heterocycles, including some pentacyclic N-heterocycles, pyrimidines and purines, were successfully added to a series of vinylesters in moderate to excellent yields to prepare N-heterocycle derivatives. The acylase-catalyzed Markovnikovaddition reaction has provided a new strategy to perform the Markovnikovaddition and expanded the application
A novel and highly efficient protocol for Markovnikov’s addition using ionic liquid as catalytic green solvent
作者:Jian-Ming Xu、Wei-Bo Wu、Chao Qian、Bo-Kai Liu、Xian-Fu Lin
DOI:10.1016/j.tetlet.2006.01.001
日期:2006.3
A novel and highly efficient protocol for Markovnikov’s addition using ionic liquid as a catalytic green solvent is described. The strategy is especially useful in the synthesis of N-heterocycle derivatives with biological activity. This reaction widens largely the applicability of ionic liquid in organic synthesis.