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.Le Paih, Jacques; Derien, Sylvie; Bruneau, Christian; Demerseman, Bernard; Toupet, Loic; Dixneuf, Pierre H. researched the compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium( cas:92390-26-6 ).Formula: C18H28ClRu.They published the article 《Ruthenium-catalyzed one-step transformation of propargylic alcohols into alkylidene cyclobutenes: X-ray characterization of an Ru(η3-cyclobutenyl) intermediate》 about this compound( cas:92390-26-6 ) in Angewandte Chemie, International Edition. Keywords: ruthenium catalyzed cyclodimerization propargylic alc carboxylic acid; alkylidene cyclobutene preparation; cyclobutenyl ruthenium alkylidene intermediate preparation crystal mol structure. We’ll tell you more about this compound (cas:92390-26-6).
[Cp*RuCl(cod)]-catalyzed reaction of propargyl alcs. in the presence of carboxylic acids leads to the one-step catalytic head-to-head cyclodimerization of propargyl alcs. to yield alkylidenecyclobutene derivatives Thus, reaction of 1,1-dimethylprop-2-ynol with acetic acid in the presence of 5 mol% of [Cp*RuCl(cod)] in isoprene as solvent at 40° for 20h, affords the alkylidenecyclobutene derivative I in 57% yield. To investigate the mechanism, a set of stoichiometric reactions were successively performed. The reaction of [Cp*RuCl(cod)] with 5 equiv of ethynylcyclohexanol in THF for 2h at room temperature afforded 90% cyclobutadiene complex, which on treatment with HPF6 gave cyclobutenyl ruthenium complex II. Treatment of II with MeCO2NEt4 in THF gave 41% alkylidenecyclobutene III. The crystal structure of II was determined
Compound(92390-26-6)Formula: 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