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Ruthenium(II)-catalyzed cycloaddition of 1,6-diynes with isocyanates leading to bicyclic pyridones
Y Yamamoto1, H Takagishi, K Itoh
1Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan.
Organic Letters
|June 22, 2001
Abstract:
[reaction: see text] A ruthenium(II) complex possessing a planar Cp ligand, CpRu(cod)Cl, effectively catalyzed the [2 + 2 + 2] cycloaddition of 1,6-diynes with isocyanates to afford bicyclic pyridones in 58-87% yields.