Ir and Rh complex-catalyzed intramolecular alkyne-alkyne couplings with carbon monoxide and isocyanides
Intramolecular [2+2+1] cycloaddition of diynes with carbon monoxide was catalyzed by Vaska's complex (IrCl(CO)(PPh3)2) or IrCl(cod)(dppp), and cyclopentadienones were obtained in good to high yields. The first catalytic synthesis of
NIckel(0)-Promoted Cyclization of 1,n-Diynes with Isocyanide: The First Practical Synthesis of Polycyclic Iminocyclopentadienes
1,n-Diynes having alkyl, aryl, and trimethylsilyl groups as the terminal substituents undergo cyclization with 2,6-dimethylphenyl isocyanide in the presence of a stoichiometric amount of bis( cyclooctadiene)nickel(0) to form polycyclic iminocyclopentadien
Tamao, Kohei,Kobayashi, Kenji,Ito, Yoshihiko
p. 3517 - 3519
(2007/10/02)
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