No-carrier-added asymmetric synthesis of α-methyl-α-amino acids labelled with fluorine-18
作者:Philippe Damhaut、Christian Lemaire、Alain Plenevaux、Claude Brihaye、Léon Christiaens、Dominique Comar
DOI:10.1016/s0040-4020(97)00265-2
日期:1997.4
been synthesized with high enantiomeric purity (ee > 97%). These new radiopharmaceuticals for Positron Emission Tomography (PET), potential inhibitors of enzymatic functions, were regiospecifically labelled by nucleophilic substitution on trimethylammoniumbenzaldehyde triflate precursors 9. The [18F]fluoro aromatic aldehydes 12 obtained were easily converted to the corresponding [18F]fluorobenzyl halides
已经合成了具有高对映体纯度(ee> 97%)的各种[ 18 F]氟芳族α-甲基-1-氨基酸11。这些新的正电子发射断层扫描(PET),潜在的酶功能抑制剂的放射性药物在三甲基铵苯甲醛三氟甲磺酸前体9上通过亲核取代被区域特异性标记。所获得的[ 18 F]氟芳族醛12易于转化为相应的[ 18 F]氟苄基卤化物[ 13(X = I)]。(2S,5S)-1-叔丁基-Boc-2-叔丁基-3,5-二甲基-咪唑烷基-4-酮2的烯醇锂烷基化后在120分钟的合成时间之后,在HPLC纯化之后,将加合物裂解以得到各种[ 18 F]氟-α-甲基氨基酸类似物,其放射化学产率为10%(轰炸结束,EOB)。还制备了相应的[ 19 F]氟化氨基酸4和[ 19 F]氟中间体。