1D Zn(II) coordination polymer of arylhydrazone of 5,5-dimethylcyclohexane-1,3-dione as a pre-catalyst for the Henry reaction
作者:Nuno M.R. Martins、Kamran T. Mahmudov、M. Fátima C. Guedes da Silva、Luísa M.D.R.S. Martins、Firudin I. Guseinov、Armando J.L. Pombeiro
DOI:10.1016/j.catcom.2016.08.039
日期:2016.12
Reaction of a new hydrazone of β-diketone, 5-(2-(4,4-dimethyl-2,6-dioxocyclohexylidene)hydrazinyl)isophthalic acid (H3L), with zinc(II) nitrate hexahydrate in a mixture of DMF and water (1:1) under hydrothermal conditions affords the 1D coordination polymer [Zn(μ3-HL)(H2O)2]n ∙ nH2O (1), where one of the carboxylic groups links two Zn(II) centers in a bridging bidentate (syn-syn-type) mode and the
β-二酮新5-,5-(2-(4,4-二甲基-2,6-二氧代环己叉基)肼基)间苯二甲酸(H 3 L)与六水合硝酸锌(II)在DMF中的反应和水(1:1)水热条件下,得到1D配位聚合物[锌(μ 3 -HL)(H 2 O)2 ] ñ ∙nH的2 O(1),其中,羧酸基团链接两个Zn中的一个(II )以桥接双齿(syn-syn- type)模式为中心,其余的以单齿方式连接第三种金属阳离子。通过IR和NMR光谱,ESI-MS,元素和单晶X射线晶体结构分析来表征。1个在40°C的水性介质中可作为亨利反应的有效预催化剂,提供具有良好收率(67-86%)和非对映选择性的β-硝基醇(syn:anti 77:23-69:31)。