Synthesis of a Novel γ-Folic
Acid-<i>N</i>
<sup>τ</sup>-Histidine
Conjugate Suitable for Labeling with <sup>99m</sup>Tc
and <sup>188</sup>Re
作者:Viola Groehn、Christof Sparr、Urs Michel、Roger Marti、Cristina Müller、Roger Schibli、Rudolf Moser
DOI:10.1055/s-0028-1083345
日期:——
coupled to protected pteroic acid to give 1 in two steps in 47% yield. N τ-(Functionalized aminoalkyl)histidine was synthesized by two different routes. The preferred route starting from Boc-His-OMe led in two steps to the N τ-(functionalized aminoalkyl)histidine in 36% yield. alkylations - amino acids - regioselectivity - organometallic - receptor
放射性标记的叶酸衍生物具有靶向叶酸受体阳性肿瘤细胞的潜能,可用于无创诊断和治疗。我们报告一个新的γ-叶酸酸的合成Ñ τ组氨酸偶联物1,其中Ñ τ组氨酸是适合于与同位素放射性标记99米TC(诊断)和¹88的Re(治疗)。一种模块化的合成策略应用于:Ñ α -Boc-α羧基-保护的谷氨酸被amidically链接到Ñ τ -经由γ-羧基(官能化氨基烷基)组氨酸,以形成结构单元8。中级8将其与受保护的蝶酸偶联,分两步得到1,收率47%。Ñ τ - (官能氨基烷基)组氨酸是由两个不同的途径合成。由Boc-的His-OME开始,优选的途径导致在两个步骤中对Ñ τ - (官能氨基烷基),收率36%组氨酸。 烷基化-氨基酸-区域选择性-有机金属-受体