Carbon–oxygen and carbon–sulfur bond activation of vinyl esters, ethers and sulfides by low valent ruthenium complexes
Carbon–oxygen and carbon–sulfur bond activation of vinyl esters, ethers and sulfides by low valent ruthenium complexes
复制标题
低价钌配合物活化乙烯基酯、醚和硫化物的碳-氧和碳-硫键
DOI:
10.1039/b002428g
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
S. Komiya
中科院分区:
文献类型:
--
作者:
J. G. Planas;T. Marumo;Yoichi Ichikawa;M. Hirano;S. Komiya
[Ru(cod)(cot)] (1) (cod: 1,5-cyclooctadiene, cot: 1,3,5-cyclooctatriene) reacts with phenyl vinyl ether and vinyl sulfides in the presence of the bidentate depe ligand affording the zerovalent (η2-vinyl ether or sulfide)ruthenium(0) complexes, [Ru(η2-C2H3YR)(cod)(depe)] [RY = PhO (2a), PhS (2b), PhCH2S (2c), EtS (2d), Me2CHS (2e), depe: 1,2-bis(diethylphosphino)ethane]. Whereas the vinyl ether or sulfide ligand is selectively displaced in 2a, 2d and 2e by monodentate phosphines giving [Ru(cod)(depe)L] [L = PMe3 (3a), PMe2Ph (3b)], partial exchange reactions of either the vinyl sulfide ligand or cod take place for 2b and 2c affording 3a and b and [Ru(η2-C2H3SR)(depe)(L)2] [L = PMe3, R = Ph (4a), L = PMe2Ph, R = Ph (4b); L = PMe3, R = CH2Ph (4c)]. The intermolecular C–S bond cleavage takes place in 4a promoted by MeI to form [Ru(I)(η1-C2H3)(depe)(PMe3)2] 5 with liberation of MeSPh. On the other hand, reactions of 1 with vinyl carboxylates in the presence of tertiary phosphines such as PMe3, PEt3 or depe give a series of (η1-vinyl)ruthenium(II) complexes cis-[Ru(η1-C2H3)(η1-OCOR′)(PMe3)4] [R′ = Me (6a), Et (6b), tBu (6c), Ph (6d)], mer-[Ru(η1-C2H3)(η2-OCOR′)(PEt3)3] [R′ = Me (7a), Et (7b), tBu (7c), Ph (7d), C(Me)CH2 (7e)], trans-[Ru(η1-C2H3)(η1-OCOR′)(depe)2] [R′ = Me (8a), Et (8b), tBu (8c), Ph (8d), C(Me)CH2 (8e)]. The structures of 2a, 2b, 3a, and 8a have been determined by X-ray crystallography. A mechanism including prior co-ordination of the vinylic moiety has been proposed for the C–O bond cleavage reaction on ruthenium(0).