Intramolecular Cyclotrimerization of Triynes Catalyzed by N-Heterocyclic Carbene−CoCl2/Zn or −FeCl3/Zn

Naoko Saino,and Daisuke Kogure,Sentaro Okamoto

Intramolecular Cyclotrimerization of Triynes Catalyzed by N-Heterocyclic Carbene−CoCl2/Zn or −FeCl3/Zn

2005

Naoko Saino
and Daisuke Kogure
Sentaro Okamoto

Triynes 1 could effectively be cyclotrimerized to annulated benzenes 2 by treatment with a catalytic amount of zinc powder, N-heterocyclic carbene, and CoCl2 or FeCl3.

Keywords:

Zinc
Catalysis
Photochemistry
Intramolecular force
Organic chemistry
Carbene
Chemistry

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