So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Yamamoto, Yoshihiko; Kinpara, Keisuke; Ogawa, Ryuji; Nishiyama, Hisao; Itoh, Kenji researched the compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium( cas:92390-26-6 ).Recommanded Product: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium.They published the article 《Ruthenium-catalyzed cycloaddition of 1,6-diynes and nitriles under mild conditions: role of the coordinating group of nitriles》 about this compound( cas:92390-26-6 ) in Chemistry – A European Journal. Keywords: cycloaddition alkadiyne nitrile ruthenium catalyst bicyclic pyridine preparation. We’ll tell you more about this compound (cas:92390-26-6).
In the presence of a catalytic amount of [Cp*RuCl(cod)] (Cp* = pentamethylcyclopentadienyl, cod = 1,5-cyclooctadiene), 1,6-diynes were allowed to react chemo- and regioselectively with nitriles bearing a coordinating group, such as dicyanides or α-halo nitriles, at ambient temperature to afford bicyclic pyridines. Careful screening of nitrile components revealed that a CC triple bond or heteroatom substituents, such as methoxy and methylthio groups, acted as the coordinating groups, whereas C=C or C=O double bonds and amino groups failed to promote cycloaddition This suggests that coordinating groups with multiple π-bonds or lone pairs are essential for the nitrile components.
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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method