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卷 42, 期 4, 页码 659-662出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(00)02033-5
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The synthesis of 5'-methyl-2,2'-bipyridine-6-carboxylic acid is described starting from the pivotal 5'-methyl-6-bromo-2,2'-bipyridine building block. Functionalisation of the latest at the 5'-methyl position gives access to the 5'-bromomethyl, 5'-hydroxymethyl and 5'-aminomethyl derivatives. Upon nucleophilic substitution, the hydroxy and amino derivatives react with the 5'-bromomethyl compound to give quasi-linear and podand type intermediates. Thanks to a carboalkoxylation reaction at the 6-bromo position of the different intermediates, followed by a saponification reaction, mono-, bis- and tris-tridentate ligands are obtained, which are particularly well suited for the complexation of lanthanide(III) cations. (C) 2001 Elsevier Science Ltd. All rights reserved.
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