288632-72-4Relevant academic research and scientific papers
Ruthenium carbonyl complexes bearing secondary phosphine oxides and phosphinous acids: Synthesis, characterization, and application in catalysis
Graux, Lionel V.,Giorgi, Michel,Buono, Gérard,Clavier, Hervé
, p. 1864 - 1871 (2015)
Two series of ruthenium carbonyl complexes bearing either one secondary phosphine oxide ligand or two phosphinous acids have been synthesized and characterized. The catalytic behavior of these complexes has been then investigated for the cycloisomerizatio
Ru(II)- and Pt(II)-catalyzed cycloisomerization of ω-Aryl-1-alkynes. Generation of carbocationic species from alkynes and transition metal halides and its interception by an aromatic ring
Chatani, Naoto,Inoue, Hiroki,Ikeda, Tsutomu,Murai, Shinji
, p. 4913 - 4918 (2007/10/03)
The treatment of aryl-1-alkynes, such as 4-aryl-1-butyne, 5-aryl-1-pentyne, and 6-aryl-1-hexyne, with catalytic amounts of transition metal chlorides, such as PtCl2 and [RuCl2(CO)3]2, at 80 °C in toluene results in cycloisomerization to give dihydronaphthalenes or dihydrobenzocycloheptenes, in which the cyclization mode is dependent on the length of the tethers. The reaction is limited to substrates containing terminal alkynes. A key step of the reaction is the intramolecular interception by an aromatic ring of the vinylmetal complex 2, which contains a cation center at the β-position, generated from the electrophilic addition of transition metal halides toward an alkyne. The more electron-rich aryl systems are more reactive.
