Synthesis of Novel 1,4,7,10-Tetraazacyclodecane-1,4,7,10-Tetraacetic Acid (DOTA) Derivatives for Chemoselective Attachment to Unprotected Polyfunctionalized Compounds
作者:Sebastian Knör、Armin Modlinger、Thorsten Poethko、Margret Schottelius、Hans-Jürgen Wester、Horst Kessler
DOI:10.1002/chem.200700231
日期:2007.7.16
e (cyclen) with one equivalent of para-functionalized alkyl 2-bromophenyl-acetate and three equivalents of tert-butyl 2-bromoacetate. The resulting compounds, which contain an additional carbonyl or alkyne functionality, allow site specific labeling of appropriately functionalized unprotected biomolecules in a rapid manner via click reactions. This was demonstrated by the attachment of our new DOTA
描述了方便的合成新的双官能聚(氨基羧酸盐)螯合剂,其允许化学选择性地附着到高度官能化的生物分子上。基于众所周知的螯合剂1,4,7,10-四氮杂环癸烷-1,4,7,10-四乙酸(DOTA),我们通过烷基化1,4,7,10-合成了带有附加官能团的新型双功能螯合剂四氮杂环十二烷(环烷)与一当量的对官能化的2-溴苯基乙酸烷基酯和三当量的2-溴乙酸叔丁基酯。所得的化合物,其包含额外的羰基或炔烃官能团,允许通过点击反应以快速的方式对适当官能化的未保护生物分子进行位点特异性标记。通过化学选择性肟连接和CuI催化的叠氮化物-炔烃环加成反应,将我们的新DOTA衍生物与生长抑素类似物Tyr3-奥曲肽连接,可以证明这一点。含有放射性金属化合物的小鼠的初步生物分布研究证明了所描述的DOTA偶联的适用性。