Reaction mechanisms of [2+2] cycloaddition of ketene and ketimine catalyzed by N-heterocyclic carben

• 作 者: FangfangLi;XueLi;YanyanZhu;MingshengTang;
• 机 构: Collegeof Chemistryand Molecular Engineering,ZhengzhouUniversity,Henan Province,Zhengzhou,450001,P.R
• 出 处: 中国化学会第30届学术年会
• 发表日期: 2016年期

　　N-heterocyclic carbenes (NHCs) have attracted great attention because of their high and special activity[1].Recently,NHCs exhibit promising properties as one unique class of organocatalysts for a number of reactions in organic chemistry[2].Various C-C bond formations have been achieved by NHC organocatalysts,such as the benzoin reaction,the Stetter reaction,andhomoenolate reactions[3].