110429-89-5Relevant academic research and scientific papers
Organoiridium compounds with bidentate phosphines as highly regioselective catalysts for alkynes cyclotrimerization
Fabbian, Matteo,Marsich, Nazario,Farnetti, Erica
, p. 2881 - 2888 (2008/10/09)
The iridium derivatives HIr(cod)(L-L) (cod=1,5-cyclooctadiene; L-L=Ph 2PCH2PPh2 (dppm); Ph2P(CH 2)2PPh2 (dppe); Ph2P(CH 2)3PPh2 (dppp); Ph2P(CH 2)4PPh2 (dppb); o-C6H 4(PPh2)2; Cy2P(CH2) 2PCy2 (dcpe); o-Me2NC6H 4PPh2 (P-NMe2)) and Ir(OMe)(cod)(dppe-F) (dppe-F=(C6F5)2P(CH2) 2P(C6F5)2) are active catalysts for the cyclotrimerization of phenylacetylene and substituted derivatives. The nature of the phosphine ligand has a pronounced effect on catalytic activity and selectivity of the reactions: in some cases (L-L=dcpe, dppe-F) mixtures of oligomerization and polymerization products are obtained, in others only cyclomerization is observed, with regioselectivities as high as 100% of the 1,2,4-trisubstituted benzenes in the reactions catalyzed by HIr(cod)(dppm). The observed regioselectivity is discussed in terms of preferential formation of one of the possible metallacyclic intermediates of the catalytic reaction.
PREPARATION OF IrH(diene)L2 COMPOUNDS VIA METHOXYIRIDIUM COMPLEXES: CATALYSTS FOR HYDROGEN TRANSFER REACTIONS
Fernandez, Maria J.,Esteruelas, Miguel A.,Covarrubias, Macarena
, p. 343 - 350 (2007/10/02)
Hydrido-diene complexes of general formula IrH(diene)L2 (diene = tetrafluorobenzobarrelene (TFB), 1,5-cyclooctadiene (COD); L = PPh3; L2 bis(1,2-diphenylphosphino)ethane (dppe), bis(1,3-diphenylphosphino)etane (dppe), bis(1,3-dipheny
