Synthesis of rigid ethynyl-bridged polytopic picolinate ligands for MOF applications

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• 作者：Veró ; nica Jornet-Mollá ; Francisco M. Romero ; ^{fmrm@uv.es" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Picolinate ; Metal&ndash ; organic frameworks ; Sonogashira reaction
• 刊名：Tetrahedron Letters
• 出版年：2015
• 出版时间：28 October 2015
• 年：2015
• 卷：56
• 期：44
• 页码：6120-6122
• 全文大小：280 K

文摘

Segmented homopolytopic ligands that consist of a rigid central arylene platform, ethynylene spacers, and terminal chelating picolinate subunits have been synthesized in good yields in a two-step procedure involving a Sonogashira-type cross coupling reaction between the ester methyl 5-bromopyridine-2-carboxylate and several arylacetylenes, followed by hydrolysis of the resulting methyl picolinates. A similar strategy has been employed for the preparation of heteroditopic ligands containing picolinate and a second non-chelating pyridine or benzoate unit. The compounds are potential candidates for organic linkers in metal–organic frameworks (MOFs).