首页> 外文期刊>RSC Advances >Reaction of sodium 2-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl) benzenesulfonate with ethylenediamine on Cu(ii) and Ni(ii) centres: efficient Cu(ii) homogeneous catalysts for cyanosilylation of aldehydes
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Reaction of sodium 2-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl) benzenesulfonate with ethylenediamine on Cu(ii) and Ni(ii) centres: efficient Cu(ii) homogeneous catalysts for cyanosilylation of aldehydes

机译:用乙二胺对Cu(II)和Ni(II)中心的2-(2-(2,4-(2,4-(2,4-(2,4-二恶戊烷-3-千氯)肼)苯磺酸酯:用于醛甲烷化的高效Cu(II)均相催化剂

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摘要

By reacting copper( II ) or nickel( II ) salts with sodium 2-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl) benzenesulfonate (NaHL) in an EtOH/H _(2) O solvent mixture and in the presence of ethylenediamine (en), [Cu(HL) _(2) (en) _(2) ] ( 1 ) or {[Ni(en) _(3) ](HL) _(2) }·C _(2) H _(5) OH·6H _(2) O ( 2 ) were synthesized, respectively. In MeOH, the coordination polymer [Cu(μ-L ~(1) -1κ O , NN ′ N ′′:2κ O ′)] _( n ) ( 3 ) was obtained, where L ~(1) refers to a dianionic ligand species attained via Schiff-base condensation of NaHL with en on the Cu( II ) metal centre, whereas no reaction was obtained in the case of Ni( II ). All the compounds were characterised by IR spectroscopy, ESI-MS, elemental and single-crystal diffraction. The Cu( II ) compounds 1 and 3 act as effective homogenous catalysts for the cyanosilylation reaction of a variety of aldehydes with trimethylsilyl cyanide affording the corresponding cyanohydrin trimethylsilyl ethers in high yields (up to 93%) and at room temperature.
机译:通过将铜(II)或镍(II)与钠2-(2-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2,4-(2))磺酸盐(2)溶剂混合物中的混合物中的苯磺酸盐(NaHl)反应乙二胺(烯),[Cu(H1)_(2)(Zh)_(2)](1)或{[Ni(Zh)_(3)](HL)_(2)}}·c _(2)H _(5)OH·6H·6H _(2)o(2)合成。在MeOH中,获得配位聚合物[Cu(μ-1〜(1)-1κO,NN'n':2κO')] _(n)(3),其中L〜(1)是指a在Cu(II)金属中心的NaHL席克斯基础缩合的Dianionic配体等物种在Cu(II)金属中心,而Ni(II)的情况下没有得到反应。所有化合物的特征在于IR光谱,ESI-MS,元素和单晶衍射。 Cu(II)化合物1和3用作各种醛与三甲基甲硅烷基氰化物的氰化物反应的有效均匀催化剂,得到相应的氰醇三甲基甲硅烷基醚(高达93%)和室温。

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