Transition-Metal-Free Synthesis of<i>N</i>-(1-Alkenyl)imidazoles by Potassium Phosphate-Promoted Addition Reaction of Alkynes to Imidazoles
作者:Linhua Lu、Hong Yan、Defu Liu、Guangwei Rong、Jincheng Mao
DOI:10.1002/asia.201301173
日期:2014.1
The additionreaction of alkynes to N‐heterocycles by simply heating in DMSO with potassium phosphate is reported. Good yields with high stereoselectivity could be achieved for a range of substrates. The scope is quite general for both amines and phenylacetylenes. In addition, internal alkynes and α‐bromostyrene were also examined in this reaction. This process is efficient and useful for the synthesis
Iron-Catalyzed Cross-Coupling Reaction of Vinyl Bromides or Chlorides with Imidazoles in the Absence of Ligands and Additives
作者:Jincheng Mao、Guanlei Xie、Jiaming Zhan、Qiongqiong Hua、Daqing Shi
DOI:10.1002/adsc.200900066
日期:2009.6
Abstractmagnified imageHighly effective coupling of imidazoles with (E)‐vinyl halides can be achieved by using readily available iron catalysts under ligand‐free, copper‐free and palladium‐free conditions. Coupling of (E)‐vinyl bromides led to (Z)‐products predominantly, while the reactions of (E)‐vinyl chlorides afforded (E)‐isomers as the major products.