Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/34519
標題: Reaction of CpCo(PPh3)(2) with diphenylphosphinoalkynes: Syntheses and X-ray structures of 1,3-cyclobutadiene-substituted CpCoCb diphosphine and 2,5-cobaltacyclopentadiene diphosphine dioxide
作者: Chang, C.P.
洪豐裕
Kultyshev, R.G.
Hong, F.E.
關鍵字: Dppf
cobalt-containing phosphine
Suzuki coupling reaction
diphenylphosphinoalkynes
cobaltacyclopentadiene
(eta(5)-cyclopentadienyl)(eta(4)-cyclobutadiene)cobalt
c-o bond
palladium-catalyzed amination
cross-coupling reactions
aryl
chlorides
room-temperature
reductive elimination
phosphine-ligands
general-method
diaryl ethers
complexes
期刊/報告no:: Journal of Organometallic Chemistry, Volume 691, Issue 26, Page(s) 5831-5837.
摘要: A potentially bidentate cobalt-containing phosphine ligand, [(eta(5)-C5H5)Co(eta(4)-1,3-(PPh2)(2)C4Ph2)] (trans-1), was prepared from the reaction between PhC CPPh2 and CpCo(PPh3)(2) obtained in situ from CoCl(PPh3)(3) and NaCp. The cobaltacycle [(eta(5)-C5H5)(PPh3)Co(2,5-(PPh2)(2)C4H2)] (2) was prepared from the reaction of CpCo(PPh3)(2) with HC CPPh2. An oxidized product [(eta(5)-C5H5)(PPh3)Co(2,5-(P(O)Ph-2)(2)C4H2)] (4), was obtained upon the attempted isolation of 2 using CTLC. Both 2 and 4 failed to produce [(eta(5)-C5H5)Co(eta(4)-1,2-(PPh2)(2)C4H2)] or its oxidized analog, respectively, upon thermal activation. The performance of phosphine 1 in the Suzuki coupling of several aryl chlorides with phenylboronic acid in the presence of Pd(OAc)(2) was evaluated. (c) 2006 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/34519
ISSN: 0022-328X
文章連結: http://dx.doi.org/10.1016/j.jorganchem.2006.09.043
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