82066-58-8Relevant academic research and scientific papers
SILICA-SUPPORTED IRIDIUM-PHOSPHINE CATALYSTS FOR THE REACTION OF SILANES WITH ALCOHOLS
Dwyer, J.,Hilal, H.S.,Parish, R.V.
, p. 191 - 202 (1982)
Silica-supported iridium catalysts have been evaluated in the reactions of HSiR3 (R = Et, OEt) and Me3SiOnSiMe3 (PS1, n = 1; PS50, n 50) with a wide variety of primary alcohols.Catalysts obtained by reaction of IrCl(CO)2 with silica are rapidly deactivated in a manner similar to the related homogeneous systems.More active catalysts are obtained by treating the silica first with Ph2P(CH2)2Si(OEt)3 and then with 2.The order of reactivity of the silanes is PS50 HSi(OEt)3 > HSiEt3 PS1, and that of the alcohols reflects principally the bulk of the organic group.Kinetic analysis indicates two pathways involving iridium bound to the phosphine and directly to the silica.The 29Si NMR spectra of PS50 and the product of its reaction with Ph(CH2)2OH are reported.
