Synthesis of valuable terpyridine building blocks to generate a variety of metallodendrons by the convergent approach
摘要:
Efficient strategies for the synthesis of three building-blocks 4'-(functionalized)-2,2':6',2 ''-terpyridine have been developed for the convergent synthesis of metallodendrons; these strategies provide a practical approach for the rational design of highly conjugated metallodendrimers. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of valuable terpyridine building blocks to generate a variety of metallodendrons by the convergent approach
摘要:
Efficient strategies for the synthesis of three building-blocks 4'-(functionalized)-2,2':6',2 ''-terpyridine have been developed for the convergent synthesis of metallodendrons; these strategies provide a practical approach for the rational design of highly conjugated metallodendrimers. (c) 2007 Elsevier Ltd. All rights reserved.
A rigid metallohexameric macrocycle composed of endo- and exo-cyclic bisterpyridine-metal complexes
作者:Sinan Li、Charles N. Moorefield、Carol D. Shreiner、Pingshan Wang、Rajarshi Sarkar、George R. Newkome
DOI:10.1039/c1nj20195f
日期:——
Synthesis of terpyridine-based building blocks has allowed the self-assembly of a nanosized metallomacrocycle with precisely positioned, peripheral metal complexes. Construction of the precursors included the assembly of a heteroleptic bisterpyridine-Ru(II) complex possessing a diiodoaryl moiety that was subsequently reacted with two equivalents of 4′-ethynyl-2,2′ : 6′,2′′-terpyridine via a Pd(0)-catalyzed Sonagashira coupling, to generate the requisite monomer with two, 120°-juxtaposed metal coordination sites. Addition of one equivalent of Fe(II) to one equivalent of the bisligand afforded the metallocycle with 12 metals [6 internal Fe(II) ions and 6 external Ru(II) ions] measuring ca. 7 nm in diameter.