Yamamoto, Yoshihiko; Kinpara, Keisuke; Saigoku, Tomoaki; Nishiyama, Hisao; Itoh, Kenji published the article 《Synthesis of benzo-fused lactams and lactones via Ru(ii)-catalyzed cycloaddition of amide- and ester-tethered α,ω-diynes with terminal alkynes: electronic directing effect of internal conjugated carbonyl group》. Keywords: diyne amide linked terminal alkyne regioselective cycloaddition ruthenium; lactam benzo preparation; ester linked diyne terminal alkyne regioselective cycloaddition ruthenium; lactone benzo preparation; cycloaddition catalyst ruthenium.They researched the compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium( cas:92390-26-6 ).Synthetic Route of C18H28ClRu. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:92390-26-6) here.
In the presence of a catalytic amount of Cp*RuCl(cod), 1,6- and 1,7-diynes connected by an amide or an ester tether underwent cycloaddition with terminal alkynes at room temperature to give rise to cycloadducts, e.g., I, in 40-93% yields with 63 : 37-83 : 17 regioisomer ratios.
Compound(92390-26-6)Synthetic Route of C18H28ClRu received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium), if you are interested, you can check out my other related articles.
Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method