In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Ruthenium-catalyzed [2 + 2 + 2] cocyclization of diene-yne, published in 2007-06-27, which mentions a compound: 92390-26-6, Name is Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, Molecular C18H28ClRu, COA of Formula: C18H28ClRu.
Ruthenium-catalyzed [2 + 2 + 2] cocyclization of diene-yne was developed. The reaction conditions were very mild; i.e., a toluene solution of diene-yne was stirred in the presence of 5 mol % of Cp*Ru(cod)Cl. Tricyclic carbo- or heterocycles, e.g., I, were obtained in high yields from corresponding straight carbon-chain compounds
After consulting a lot of data, we found that this compound(92390-26-6)COA of Formula: C18H28ClRu can be used in many types of reactions. And in most cases, this compound has more advantages.
Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method