Selective linearcodimerization of terminal acetylenes and buta-1,3-diene catalysed by the first example of a dihydridotetrakis(trialkylphosphine)-ruthenium complex is reported.
Stoichiometric and catalytic reaction of Ru(II) phosphine complexes with alkynes, olefins, and enynes are described. The hydride complex RuCl(CO)H(PPh3)3 (1) reacts with the double bond of a cis-enyne whereas it reacts with triple bonds of trans-enynes. Metathesis of vinyl silanes with olefins are catalyzed by 1 where β-Si elimination is the key step. Dimerizations of tBu- and Me3Si-substituted acetylanes
Selective Linear Codimerization of Terminal Acetylenes and 1,3-Butadienes Catalyzed by (η<sup>4</sup>-1,5-Cyclooctadiene)(η<sup>6</sup>-1,3,5-cyclooctatriene)ruthenium(0)–Trialkylphosphine
作者:Take-aki Mitsudo、Yoji Hori、Yoshihisa Watanabe
DOI:10.1246/bcsj.59.3201
日期:1986.10
of terminal acetylenes with 1,3-butadienes catalyzed by (η4-1,5-cyclooctadiene)(η6-1,3,5-cyclooctatriene)ruthenium [Ru0(COD)(COT)]–PR3 (R=ethyl, butyl, octyl) in various solvents at 80 °C afforded linear codimers in good to excellent yield with high chemo-, regio-, and stereoselectivities. Reactions of deuterated acetylenes were also examined.
(η4-1,5-环辛二烯)(η6-1,3,5-环辛三烯)钌[Ru0(COD)(COT)]-PR3(R=乙基,丁基、辛基)在各种溶剂中在 80 °C 下得到线性共二聚体,收率良好至极好,具有高化学选择性、区域选择性和立体选择性。还检测了氘代乙炔的反应。