Reference of Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, is researched, Molecular C18H28ClRu, CAS is 92390-26-6, about Ru(II)-catalyzed [2+2+2] cycloaddition of 1,2-bis(propiolyl)benzenes with monoalkynes leading to substituted anthraquinones. Author is Yamamoto, Yoshihiko; Hata, Koichi; Arakawa, Takayasu; Itoh, Kenji.
[2+2+2] Cycloaddition of 1,2-bis(propiolyl)benzenes with monoalkynes were effectively catalyzed by chloro[(1,2,5,6-η)-1,5-cyclooctadiene][(1,2,3,4,5-η)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl]ruthenium under mild conditions to give substituted anthraquinones in moderate to high yields. The reaction of chloro[(1,2,5,6-η)-1,5-cyclooctadiene][(1,2,3,4,5-η)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl]ruthenium with 1,1′-(1,2-phenylene)bis[3-phenyl-2-propyn-1-one] gave chloro[(1,4-dihydro-1,4-dioxo-2,3-naphthalenediylidene)bis(phenylmethylidyne)][(1,2,3,4,5-η)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl]rhodium (I), the crystal and mol. structures of which were reported. The intermediacy of the ruthenacycle I was proposed in the reaction mechanism.
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Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method