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Title

Easy Entry to Terminal 1,5- and 1,6-Enynes from (Indenyl)ruthenium(II) Allenylidenes and Grignard Reagents

AuthorsCadierno, Victorio; Conejero, Salvador ; Gamasa, María Pilar; Gimeno, José
KeywordsRuthenium
Allenylidenes complexes
Grinard
σ-alkynyl
Demetalation
Issue Date2-Aug-2002
PublisherAmerican Chemical Society
CitationOrganometallics 21(18): 3837-3840 (2002)
AbstractThe allenylidene complexes [Ru( C C CR1R2)(η5-C9H7)(PPh3)2][PF6] (R1 = R2 = Ph (1a); R1 = H, R2 = Ph (1b), C(Me) CPh2 (1c); CR1R2 = (1R)-1,3,3-trimethylbicyclo[2.2.1]hept-2-ylidene (1d)) react with Grignard reagents CH2 CH(CH2)nMgBr (n = 1, 2) to yield the σ-alkynyl derivatives [Ru{C CCR1R2(CH2)nCH CH2}(η5-C9H7)(PPh3)2] (2a−d, 3a−c). Protonation of 2a−d and 3a−c with HBF4·Et2O leads to the vinylidene complexes [Ru{ C C(H)CR1R2(CH2)nCH CH2}(η5-C9H7)(PPh3)2][BF4] (4a−d and 5a−c), which can be easily demetalated with acetonitrile to afford the terminal enynes HC CCR1R2(CH2)nCH CH2 (6a−d and 7a−c) and the nitrile complex [Ru(N CMe)(η5-C9H7)(PPh3)2][BF4] (8).
Description4 páginas, esquemas.
Publisher version (URL)http://dx.doi.org/10.1021/om020330n
URIhttp://hdl.handle.net/10261/37982
DOI10.1021/om020330n
ISSN0276-7333
Appears in Collections:(IIQ) Artículos
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