Structural development of free or coordinated 4'-(4-pyridyl)-2,2':6',2'-terpyridine ligands through N-alkylation: new strategies for metallamacrocycle formation |
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Authors: | Constable Edwin C Dunphy Emma L Housecroft Catherine E Kylberg William Neuburger Markus Schaffner Silvia Schofield Emma R Smith Christopher B |
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Institution: | Department of Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland. edwin.constable@unibas.ch |
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Abstract: | A series of N-alkylated derivatives of Ru(pytpy)(2)]2+ (pytpy=4'-(4-pyridyl)-2,2':6',2'-terpyridine) has been synthesised and characterised. These include both model and functionalised complexes that complement previously reported iron(II) analogues. Reaction of Ru(pytpy)(2)]2+ with bis4-(bromomethyl)phenyl]methane leads to the formation of a 2+2] ruthenamacrocycle. Related ferramacrocycles could not be accessed by this route, and instead were prepared in two steps by first reacting bis4-(bromomethyl)phenyl]methane or 4,4'-bis(bromomethyl)biphenyl with two equivalents of pytpy, and then treating the resulting bis(N-alkylated) product with iron(II) salts. |
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Keywords: | alkylation heterocycles iron metallacycles ruthenium |
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