Synthesis of a Chiral Precursor for No-Carrier-Added (NCA) PET Tracer 6-[<sup>18</sup>F]Fluoro-<b>L</b>-dopa Based on Regio- and Enantioselective Alkylation of 2,4-Bis(chloromethyl)-5-iodoanisole
作者:Chiaki Kuroda、Atsushi Ochi、Noritoshi Nakane、Takashi Umeyama、Nobuko Muto、Nami Niimura、Yoshiki Teramoto、Hiroyuki Nogami、Guvvala N. Reddy
DOI:10.1246/bcsj.73.417
日期:2000.2
(2S,5S)-5-(3-Formyl-6-iodo-4-methoxybenzyl)-1-t-butoxycarbonyl-2-t-butyl-3-methyl-4-imidazolidinone (11), a chiral intermediate towards NCA PET tracer 6-[18F]fluoro-L-dopa (1), was synthesized from 3-iodoanisole in four steps. 3-Iodoanisole was first bischloromethylated to 2,4-bis(chloromethyl)-5-iodoanisole (14). Regio- and enantio-selective alkylation of 14 with (S)-1-(t-butoxycarbonyl)-2-t-butyl-3-methyl-4-imidazolidinone (12) afforded 33, which was then hydrolyzed and oxidized to the desired intermediate 11.
(2S,5S)-5-(3-甲酰基-6-碘-4-甲氧基苄基)-1-叔丁氧基羰基-2-叔丁基-3-甲基-4-咪唑啉酮 (11),NCA 的手性中间体PET 示踪剂 6-[18F]氟-L-多巴 (1) 由 3-碘茴香醚分四步合成。 3-碘茴香醚首先被双氯甲基化为 2,4-双(氯甲基)-5-碘茴香醚 (14)。 14与(S)-1-(叔丁氧基羰基)-2-叔丁基-3-甲基-4-咪唑啉酮(12)进行区域和对映选择性烷基化得到33,然后将其水解并氧化成所需化合物中间 11.