Mono- and Tetraalkyne Modified Ligands and Their Eu3+ Complexes - Utilizing “Click” Chemistry to Expand the Scope of Conjugation Chemistry
作者:Mojmír Suchý、Mark Milne、Alex X. Li、Nevin McVicar、David W. Dodd、Robert Bartha、Robert H. E. Hudson
DOI:10.1002/ejoc.201100945
日期:2011.11
elaborate analogues of a candidate PARACEST MRI contrast agent, which is a complex of Eu3+ with DOTAM–Gly–Phe–OH. Analogues possessing either one L-tyrosine in place of an L-phenylalanine, or with all four phenylalanine units replaced, were transformed into Tyr(O-propargyl) substrates for “click” chemistry. Conjugation of the Eu3+–DOTAM derivatives with a spectrum of azides, including simple hydrophilic
Cu+ 催化的 Huisgen [3+2] 环加成反应已被用于制备候选 PARACEST MRI 造影剂的类似物,它是 Eu3+ 与 DOTAM-Gly-Phe-OH 的复合物。具有一个 L-酪氨酸代替 L-苯丙氨酸或所有四个苯丙氨酸单元被替换的类似物被转化为 Tyr(O-炔丙基) 底物用于“点击”化学。Eu3+–DOTAM 衍生物与一系列叠氮化物(包括简单的亲水、疏水和芳香基团、丙基葡糖苷和核苷)的共轭是成功的。检查了所得缀合物的磁共振特性,并报告了它们的化学交换饱和转移 (CEST) 特性。