Building on the previously reported fluorous labeling strategy (FLS), a new approach for preparing molecular imaging and therapy agents derived from radioiodine in high purity without the need to employ HPLC was developed. A series of novel reagents containing a fluorous arylstannane, including fluorous benzaldehydes (1a/b) and an aryl-iodoacetamide (2), were prepared so that the FLS could be used to label and purify targeting vectors that contain free amines or thiol groups. The reagents were conjugated to model amines and thiols in generally high yields (79–95%) under mild conditions. The fully characterized products were radiolabeled with Na[125I] in the presence of iodogen and the products were purified using fluorous solid-phase extraction to yield the desired iodinated products in high yield (>83%) and high effective specific activity (ESA). The work reported creates a convenient and flexible means of preparing targeted molecular imaging and therapy agents derived from radioisotopes of iodine in high ESA. Copyright © 2010 John Wiley & Sons, Ltd.
基于先前报道的
氟疏
水标记策略(FLS),开发了一种新方法,可以在高纯度下制备来源于放射性
碘的分子成像和治疗试剂,而无需采用HPLC。准备了一系列包含
氟疏
水芳基
锡化合物的新试剂,包括
氟疏
水苯甲醛(1a/b)和芳基
碘乙酰胺(2),以便利用FLS对含有游离胺或
硫醇基团的靶向载体进行标记和纯化。这些试剂在温和条件下与模型胺和
硫醇偶联,产率通常较高(79–95%)。经过全面表征的产品在
碘化剂存在下与Na[125I]进行放射性标记,并通过
氟疏
水固相萃取进行纯化,以获得所需的
碘化产品,产率高于83%且具有高有效比放射性(E
SA)。所报道的工作创造了一种方便灵活的方法,用于制备以放射性
碘同位素为基础的靶向分子成像和治疗试剂,且具有高E
SA。版权 © 2010 John Wiley & Sons, Ltd.