Journal
CHEMISTRY LETTERS
Volume 34, Issue 8, Pages 1098-1099Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.2005.1098
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The present work describes a convenient and efficient approach for the synthesis of bifunctional chelating agent, 1-(p-aminobenzyl)ethylenediaminetetramethylphosphonic acid (Am-Bz-EDTMP). The key steps involved are functionalization of L-phenylalanine to give ethylenediaminetetraacetic acid derivative and its conversion to phosphonic acid followed by the reaction with NHS-folate to give 1-(p-aminobenzyl)EDTMP-folate conjugate to be used for targeted radio imaging and therapy. Radiolabeling with In-111 and Sm-153 of Folate-Bz-EDTMP conjugate showed very high stability under physiological conditions.
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