134641-25-1Relevant academic research and scientific papers
Ruthenium- and Rhodium-Catalyzed Ring-Opening Coupling Reactions of Cyclopropenones with Alkenes or Alkynes
Kondo, Teruyuki,Taniguchi, Ryosuke,Kimura, Yu
, p. 717 - 722 (2018)
Ru 3 (CO) 12 -catalyzed divergent ring-opening coupling reactions of a cyclopropenone with methyl acrylate (an electron-deficient alkene) are developed. Under an argon atmosphere, a decarbonylative linear codimer is obtained, while cyclopentenones are obtained under carbon monoxide (20 atm) without decarbonylation. While ruthenium complexes show no catalytic activity for the ring-opening cocyclization of cyclopropenones with ethylene (20 atm) or bicyclo[2.2.1]hept-2-ene (2-norbornene), rhodium complexes, especially [RhCl(η 4 -1,5-cod)] 2, show high catalytic activity for the desired cocyclization reactions to give the corresponding cyclopentenones in high yields and selectivities. In addition, [RhCl(η 4 -1,5-cod)] 2 realizes the catalytic ring-opening cocyclization of cyclopropenones with internal alkynes to give the corresponding cyclopentadienones. In all these reactions, ruthena- or rhodacyclobutenones are considered to be key intermediates, generated by strain-driven oxidative addition of a cyclopropenone C-C bond to an active ruthenium or rhodium species.
Exploring bis(cyclometalated) ruthenium(II) complexes as active catalyst precursors: Room-temperature alkene-alkyne coupling for 1,3-diene synthesis
Zhang, Jing,Ugrinov, Angel,Zhang, Yong,Zhao, Pinjing
supporting information, p. 8437 - 8440 (2014/08/18)
Described is the development of a new class of bis(cyclometalated) ruthenium(II) catalyst precursors for C-C coupling reactions between alkene and alkyne substrates. The complex [(cod)Ru(3-methallyl)2] reacts with benzophenone imine or benzophe
Ruthenium Complex-catalysed Highly Selective Codimerisation of Acetylenes and Alkenes
Mitsudo, Take-aki,Zhang, Shi-Wei,Nagao, Masaki,Watanabe, Yoshihisa
, p. 598 - 599 (2007/10/02)
2,4-Dienes are prepared in high yields with high regioselectivity by the codimerisation of acetylenes and alkenes in the presence of a catalytic amount of Ru(cod)(cot) at 80 deg C; cod = cycloocta-1,5-diene, cot = cycloocta-1,3,5-triene.
