An Organotrifluoroborate for Broadly Applicable One-Step<sup>18</sup>F-Labeling
作者:Zhibo Liu、Maral Pourghiasian、Mark Alex Radtke、Joseph Lau、Jinhe Pan、Gemma M. Dias、Donald Yapp、Kuo-Shyan Lin、Francois Bénard、David M. Perrin
DOI:10.1002/anie.201406258
日期:2014.10.27
A new zwitterionic organotrifluoroborate is appended to three radiosynthons that afford undergo facile bioconjugation to several clinically relevant peptides and one enzyme inhibitor. Molecularly complex bioconjugates are 18F‐labeled in a single aqueous step in rapid time (<15 min) without HPLC purification to afford tracers in good yields (>200 mCi, 20–40 %) at high specific activity (≥3 Ci/μmol)
Efficient microwave-assisted synthesis of multivalent dendrimeric peptides using cycloaddition reaction (click) chemistry
作者:Dirk T. S. Rijkers、G. Wilma van Esse、Remco Merkx、Arwin J. Brouwer、Hans J. F. Jacobs、Roland J. Pieters、Rob M. J. Liskamp
DOI:10.1039/b507975f
日期:——
Multivalent dendrimeric peptides were synthesized via a microwave-assisted Huisgen 1,3-dipolar cycloaddition between azido peptides and dendrimeric alkynes in yields ranging from 46 to 96%.
A Localized Tolerance in the Substrate Specificity of the Fluorinase Enzyme enables “Last-Step”<sup>18</sup>F Fluorination of a RGD Peptide under Ambient Aqueous Conditions
A strategy for last‐step 18Ffluorination of bioconjugated peptides is reported that exploits an “Achilles heel” in the substratespecificity of the fluorinaseenzyme. An acetylene functionality at the C‐2 position of the adenosine substrate projects from the active site into the solvent. The fluorinase catalyzes a transhalogenation of 5′‐chlorodeoxy‐2‐ethynyladenosine (ClDEA) to 5′‐fluorodeoxy‐2‐ethynyladenosine
据报道,一种生物共轭肽最后一步18 F 氟化的策略利用了氟化酶底物特异性的“致命弱点”。腺苷底物 C-2 位的乙炔官能团从活性位点投射到溶剂中。氟化酶催化 5'-氯脱氧-2-乙炔基腺苷 (ClDEA) 转卤化为 5'-氟脱氧-2-乙炔基腺苷 (FDEA)。从乙炔的末端延伸聚乙二醇接头允许将生物共轭货物呈现给酶以进行18 F 标记。该方法使用[ 18 ]的水溶液(H 2 18 O)F] 氟化物由回旋加速器产生,具有同位素标记正电子发射断层扫描 (PET) 选择的肽的能力。
Development of a novel radiotheranostic platform with a DOTA-based trifunctional chelating agent
作者:Kazuma Nakashima、Shimpei Iikuni、Hiroyuki Watanabe、Masahiro Ono
DOI:10.1039/d1cc00823d
日期:——
Radiotheranostics has attracted attention as a powerful strategy for treating cancer patients with precision medicine. We designed and synthesized a novel DOTA-based trifunctional agent, ADIBO-DOTADG-ALB (ADA), which allowed compounds with targeting ligands, radiometals, and an albumin binder to be readily prepared. ADA exhibited promising properties as a theranostic platform.
The winning combination: A new and promising 18F‐labeled RGD derivative has been efficiently prepared by exploiting the advantages of “click” chemistry and a one‐step labeling protocol where a silicon‐based building blocks was used (see figure). This derivative could be a new starting point for improved visualization of αvβ3‐positive tumors by positron emission tomography.