An Improved Synthesis of PET Dopamine D<sub>2</sub> Receptors Radioligand [<sup>11</sup>C]Raclopride
作者:Xiangshu Fei、Bruce H. Mock、Timothy R. DeGrado、Ji‐Quan Wang、Barbara E. Glick‐Wilson、Michael L. Sullivan、Gary D. Hutchins、Qi‐Huang Zheng
DOI:10.1081/scc-120034174
日期:2004.12.31
An improved synthesis of [C-11]raclopride is reported. The precursor desmethyl-raclopride was synthesized from 3,5-dichloro-2,6-dimethoxybenzoic acid and (S)-(-)-2-aminoethyl-1-ethylpyrrolidine via a straightforward, four-step synthetic approach with 29% overall chemical yield. [C-11]Raclopride was prepared by O-[C-11]methylation of the precursor with [C-11]methyl triflate and purification with a semi-preparative HPLC method in 20-34% radiochemical yield, based on [C-11]methyl bromide, decay corrected to end of bombardment (EOB).
Banks, William R.; Moerlein, Stephen M.; Parkinson, David, Medicinal Chemistry Research, 1995, vol. 5, # 2/3, p. 150 - 173
作者:Banks, William R.、Moerlein, Stephen M.、Parkinson, David、Welch, Michael J.
DOI:——
日期:——
Precursor synthesis and radiolabelling of the dopamine D2 receptor ligand [11C]raclopride from [11C]methyl triflate
[11C]raclopride from [11C]methyl triflate. Conditions for the radiolabelling were optimized to obtain a simple and reproducible procedure suitable for automation. [11C]Raclopride was prepared with an average radiochemical yield of 55–65% (decay corrected, based on starting [11C]methyl triflate) in a total synthesis time (including purification and formulation of product) of 35 min. The radiolabelling procedure used