1,1-Cycloaddition of Oxalyl Dichloride with Dialkenylmetal Compounds: Formation of Cyclopentadienone Derivatives by the Reaction of 1,4,-Dilithio-1,3-dienes or Zirconacyclopentadienes with Oxalyl Chloride in the Presence of CuCl
作者:Chao Chen、Chanjuan Xi、Yanfeng Jiang、Xiaoyin Hong
DOI:10.1021/ja0506713
日期:2005.6.1
1,4-Dilithio-1,3-dienes or zirconacyclopentadienes reacted with oxalyl chloride in the presence of CuCl in a 1,1-cycloaddition manner to give cyclopentadienone derivatives in high yields along with the elimination of CO.
Ruthenium- and Rhodium-Catalyzed Ring-Opening Coupling Reactions of Cyclopropenones with Alkenes or Alkynes
作者:Teruyuki Kondo、Ryosuke Taniguchi、Yu Kimura
DOI:10.1055/s-0037-1609339
日期:2018.4
rhodium complexes, especially [RhCl(η 4 -1,5-cod)] 2 , show high catalytic activity for the desired cocyclization reactions to give the corresponding cyclopentenones in high yields and selectivities. In addition, [RhCl(η 4 -1,5-cod)] 2 realizes the catalytic ring-opening cocyclization of cyclopropenones with internal alkynes to give the corresponding cyclopentadienones. In all these reactions, ruthena-