https://www.selleckchem.com/pr....oducts/thymidine.htm
The IE proceeds through a penta-coordinate bipyramidal intermediate, followed by elimination of non-radioactive 19F, yielding the labeled compound in high RCYs at room temperature (22 °C). The simplicity and lack of side-product formation of this approach enable a one-step, kit-like preparation of structurally complex and unprotected radiopharmaceuticals. Compounds such as peptides used for tumor imaging in nuclear medicine can be 18F-labeled without the need for complex purification protocols. [18F]SiTATE can be synthesized within 30