A radiochemical method for the 18F-glycosylation of amino acid side chains was developed starting from peracetylated 2-deoxy-2-[18F]fluoroglucopyranoside (TA-[18F]FDG). O-(2-deoxy-2-[18F]fluoro-D-glucopyranosyl)-L-serine and the corresponding threonyl compound were obtained in a radiochemical yield of 25% and 12% (related to [18F]fluoride), respectively, after Zemplén deprotection within a total reaction time of 90 min. The anomeric configuration of the corresponding 19F-substituted compounds revealed preferential α-stereoselectivity. The 18F-glycosylation method using TA-[18F]FDG is compatible with the short half-life of fluorine-18 and combines glycosylation and 18F-labelling of a target compound within a single reaction step. TA-[18F]FDG is a promising 18F-labelled prosthetic group and could be adapted to 18F-labelling of bioactive peptides to study their pharmacokinetics using positron emission tomography (PET). Copyright © 2005 John Wiley & Sons, Ltd.
一种放射
化学方法用于
氨基酸侧链的18F-糖基化,起始物为乙酰化的2-脱氧-2-[18F]
氟葡萄糖吡喃苷(TA-[18F]FDG)。经过Zemplén去保护,在总反应时间90分钟内,获得了O-(2-脱氧-2-[18F]
氟-
D-葡萄糖吡喃苷)-
L-丝氨酸和相应的苏
氨酸化合物,其放射
化学产率分别为25%和12%(以[18F]
氟离子为基准)。相应的19F取代化合物的异构配置显示出优先的α-立体选择性。使用TA-[18F]FDG的18F糖基化方法与
氟-18的短半衰期相容,能够在单个反应步骤中将糖基化和18F标记结合在一起。TA-[18F]FDG是一个有希望的18F标记的假体组分,可以适用于
生物活性肽的18F标记,以使用正电子发射断层扫描(PET)研究其药代动力学。版权 © 2005 John Wiley & Sons, Ltd.