Organic Letters 2005-10-13

Synthesis of diethynyltriptycene-linked dipyridyl ligands.

Jeremy J Kodanko, Anna J Morys, Stephen J Lippard

Index: Org. Lett. 7(21) , 4585-8, (2005)

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Abstract

[reaction: see text] An efficient route to a new family of dinucleating ligands has been developed. A convergent strategy to these ligands involved dual Sonogashira cross-coupling of 2,3-diethynyltriptycene with a variety of functionally diverse 5-bromopyridines. The resultant ligands were accessed in four steps and 40-50% overall yield from 1,2,4,5-tetrabromobenzene. Synthesis of an imidazole and a quinoline derivative by this method is also described.

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