Synthesis and stability of<i>S</i>-(2-[<sup>18</sup>F]fluoroethyl)-L-homocysteine for potential tumour imaging
作者:Thomas Bourdier、Christopher J. R. Fookes、Tien Q. Pham、Ivan Greguric、Andrew Katsifis
DOI:10.1002/jlcr.1539
日期:2008.10.15
The F-18 labelled methionine derivative S-(2-[18F]fluoroethyl)-L-homocysteine ([18F]FEHCys) was prepared by a one-pot two-step synthesis via the protected S-(2-bromoethyl)-L-homocysteine 1 and S-(2-chloroethyl)-L-homocysteine 2 precursors. The bromoethyl derivative 1 gave higher radiochemical yields (40% at 5 min) at 100°C compared with the chloro-analogue (22% at 100°C in 30 min). However, [18F]FEHCys