An easy one-pot synthesis of diverse 2,5-di(2-pyridyl)pyrroles: a versatile entry point to metal complexes of functionalised, meridial and tridentate 2,5-di(2-pyridyl)pyrrolato ligands.
An easy one-pot synthesis of diverse 2,5-di(2-pyridyl)pyrroles: a versatile entry point to metal complexes of functionalised, meridial and tridentate 2,5-di(2-pyridyl)pyrrolato ligands.
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多种 2,5-二(2-吡啶基)吡咯的简单一锅法合成：功能化、子午和三齿 2,5-二(2-吡啶基)吡咯配体金属配合物的多功能入口点。
作者：
Alex McSkimming;V. Diachenko;Rachel London;Kiara Olrich;C. J. Onie;M. Bhadbhade;M. Bucknall;R. Read;Stephen B. Colbran
通过2-吡啶基甲醛（2 equiv）、具有至少一个吸电子取代基的α-亚甲基酮与乙酸铵的直接缩合，得到了多种取代在吡咯核心C3和C4位置的2,5-二（2-吡啶基）吡咯（dppHs）。此外，还鉴定了一种新的2,5-二（1,10-菲罗啉-2-基）吡咯。dpph提供了一种直接、快速进入双吡啶吡咯(dpp(-))-金属配合物的途径。经向三齿dpp（-）配体是一种有用的三吡啶配体阴离子类似物。描述了第一种（dpp）Ru配合物；中心吡咯的3,4取代显著地扰乱了这些配合物的氧化还原过程的电位。A [(dpp)Ru(bpy)(MeCN)](+) （bpy=2,2′-联吡啶）配合物是二氧化碳歧化还原为一氧化碳和碳酸盐离子的电催化剂。
A wide variety of 2,5-di(2-pyridyl)pyrroles (dppHs) substituted at the C3 and C4 positions of the pyrrole core were obtained by direct condensation of a 2-pyridylcarboxaldehyde (2 equiv), an α-methylene ketone with at least one electron-withdrawing substituent and ammonium acetate. A novel 2,5-di(1,10-phenanthrolin-2-yl)pyrrole was also characterised. The dppHs provide a direct, quick entry to dipyridylpyrrolato (dpp(-) )-metal complexes. The meridial tridentate dpp(-) ligand is a useful anionic analogue of the terpyridyl ligand. The first (dpp)Ru complexes are described; the 3,4-substitution of the central pyrrole significantly perturbs the potentials of the redox processes of these complexes. A [(dpp)Ru(bpy)(MeCN)](+) (bpy=2,2'-bipyridine) complex is an electrocatalyst for the reductive disproportionation of carbon dioxide to carbon monoxide and the carbonate ion.