New N-Heterocyclic Carbene Ligand and Its Application in Asymmetric Nickel-Catalyzed Aldehyde/Alkyne Reductive Couplings
作者:Mani Raj Chaulagain、Grant J. Sormunen、John Montgomery
DOI:10.1021/ja072992f
日期:2007.8.1
chiral N-heterocycliccarbene ligand has been prepared and examined in nickel-catalyzed, asymmetricreductive couplings of aldehydes and alkynes. In comparison with related structures that have been largely examined in asymmetric ring-closing metathesis reactions, the new ligand provides superior yields and enantioselectivities in the nickel-catalyzed reductive couplings. The scope of asymmetric couplings
Friedel-Crafts alkylation of benzene and toluene with olefinic C6 hydrocarbons and esters
作者:Kenneth D. Black、Frank D. Gunstone
DOI:10.1016/0009-3084(95)02517-0
日期:1996.1
To assist our study of the reaction of toluene and other aromatic compounds with methyl oleate and other olefinic esters, benzene and toluene have been alkylated under Friedel-Crafts conditions with hex-1-ene, hex-3-ene, methyl hex-3-enoate and methyl hex-3-enedioate. The products were isolated and identified by NMR and mass spectrometric procedures.