Ruthenium catalysed synthesis of unsaturated acetals and aldehydes via C–C bond coupling of alkynes with allyl alcohol
作者:Sylvie Dérien、Pierre H. Dixneuf
DOI:10.1039/c39940002551
日期:——
Terminal alkynes and allyl alcohol are coupled, with carbonâcarbon bond formation, in the presence of a RuIV(C5Me5) catalyst, to give γδ-unsaturated acetals and with [RuCl(C5Me5)}4] or [RuCl(cod)(C5Me5)] preferentially to produce the branched γ,δ-unsaturated aldehydes.
Ruthenium-catalysed coupling of allyl alcohol with alkynes: A new route to γ,δ-unsaturated acetals and aldehydes
作者:Sylvie Dérien、Dominique Jan、Pierre H. Dixneuf
DOI:10.1016/0040-4020(96)00185-8
日期:1996.4
γ,δ-Unsaturated acetals and aldehydes have been obtained via a new ruthenium-catalysed coupling of allylalcohol with alkynes. The branched isomer is regioselectively formed. Comparative studies of catalyst precursors have shown that (C5Me5)Ru(IV) derivatives favours the formation of acetals and that, with (C5Me5)Ru(II) moieties, the reaction can be carried out either in water or without solvent at
通过新的钌催化的烯丙醇与烯丙醇的偶合反应,获得了γ,δ-不饱和缩醛和醛。支链异构体是区域选择性形成的。催化剂前体的比较研究表明,(C 5 Me 5)Ru(IV)衍生物有利于缩醛的形成,并且对于(C 5 Me 5)Ru(II)部分,该反应既可以在水中进行,也可以在水中进行。在室温下无需溶剂。