The Preparation of 1,2-Bis(2,2′:6′,2′′-Terpyridin-4′yl)Ethanone: The First Example of 4′-Terpyridyls Unsymmetrically Linked by a Functionalized Two-Carbon Chain
作者:Zhi-Long Chen、Ronald N. Warrener、Douglas N. Butler
DOI:10.1071/ch04042
日期:——
h) with concentrated hydrochloric acid. These conversions, which involved an unprecedented homo-coupling reaction, are discussed with the structure of 7 being confirmed by X-ray single crystal analysis. The nitrile starting material 10 was prepared by reaction of the mesylate 9, derived from the known 4′-hydroxymethylterpyridine 8 with sodium cyanide, while ester 11 was prepared by reaction of 10 with
1,2-Bis(2,2':6',2''-terpyridin-4'yl)ethanone 7,一种不对称连接的双三齿配体,通过处理 4'-氰基甲基三联吡啶 10(室温,过夜)制备或 4'-(甲氧基羰基甲基)三联吡啶 11 (60°C, 7 h) 与浓盐酸。讨论了这些涉及前所未有的同质耦合反应的转换,并通过 X 射线单晶分析证实了 7 的结构。腈原料10通过由已知的4'-羟甲基三联吡啶8衍生的甲磺酸酯9与氰化钠反应制备,而酯11通过10与甲醇在浓硫酸存在下反应制备。