Synthesis of a novel ‘smart’ bifunctional chelating agent 1-(2-[β,d-galactopyranosyloxy]ethyl)-7-(1-carboxy-3-[4-aminophenyl]propyl)-4,10-bis(carboxymethyl)-1,4,7,10-tetraazacyclododecane (Gal-PA-DO3A-NH2) and its Gd(III) complex
作者:Nick J. Wardle、Amy H. Herlihy、Po-Wah So、Jimmy D. Bell、S.W. Annie Bligh
DOI:10.1016/j.bmc.2007.05.004
日期:2007.7
10-tris(carboxymethyl)-1, 4,7,10-tetraazacyclododecane (Gal-DO3A) chelating agents was developed involving full hydroxyl- and carboxyl-group protection in precursors to product. Two sequences of cyclen-N-functionalisation were subsequently investigated, one successfully, towards synthesis of the novel 'smart' bifunctional Gal-PA-DO3A-NH2 chelate. The longitudinal proton relaxivities of the neutral [Gd-(Gal-PA-DO3A-NH2)]
1-(2-β,D-吡喃半乳糖氧基]乙基)-7-(1-羧基-3-[4-氨基苯基]丙基)-4,1 0-双(羧甲基)-1,4的新合成途径,7,10-四氮杂环十二烷 (Gal-PA-DO3A-NH2) 和 1-(2-β,D-吡喃半乳糖氧基]乙基)-4,7,10-三(羧甲基)-1, 4,7,10-开发了四氮杂环十二烷 (Gal-DO3A) 螯合剂,在产品的前体中涉及完全的羟基和羧基保护。随后研究了两个循环n-N-功能化序列,一个成功地用于合成新型“智能”双功能 Gal-PA-DO3A-NH2 螯合物。在β-半乳糖苷酶存在下,中性[Gd-(Gal-PA-DO3A-NH2)] 和[Gd-(Gal-DO3A)] 配合物的纵向质子弛豫分别增加了28% 和37%。