A fully automated synthesis of N-succinimidyl 4-[18F]fluorobenzoate ([18F]SFB) was carried out by a convenient three-step, one-pot procedure on the modified TRACERlab FXFN synthesizer, including [18F]fluorination of ethyl 4-(trimethylammonium triflate)benzoate as the precursor, saponification of the ethyl 4-[18F]fluorobenzoate with aqueous tetrapropylammonium hydroxide instead of sodium hydroxide, and conversion of 4-[18F]fluorobenzoate salt ([18F]FBA) to [18F]SFB treated with N,N,N′,N′-tetramethyl-O-(N-succinimidyl)uranium tetrafluoroborate (TSTU). The purified [18F]SFB was used for the labeling of Tat membrane-penetrating peptide (containing the Arg-Lys-Lys-Arg-Arg-Arg-Arg-Arg-Arg-Arg-Arg-Pro-Leu-Gly-Leu-Ala-Gly-Glu-Glu-Glu-Glu-Glu-Glu-Glu sequence, [18F]CPP) through radiofluorination of lysine amino groups. The uncorrected radiochemical yields of [18F]SFB were as high as 25–35% (based on [18F]fluoride) (n=10) with a synthesis time of∼40 min. [18F]CPP was produced in an uncorrected radiochemical yields of 10–20% (n=5) within 30 min (based on [18F]SFB). The radiochemical purities of [18F]SFB and [18F]CPP were greater than 95%. Copyright © 2010 John Wiley & Sons, Ltd.
                                    在改进型 
TRACERlab FXFN 合成仪上,通过便捷的三步单锅程序,实现了 
4-[18F]氟苯甲酸 N-琥珀
酰亚胺酯([18F]SFB)的全自动合成,包括以 4-(三甲基三酸
铵)
苯甲酸乙酯为前体的[18F]
氟化反应、用
四丙基氢氧化铵水溶液代替
氢氧化钠对 
4-[18F]氟苯甲酸乙酯进行皂化,并用 N,N,N′,N′-四甲基-O-(N-琥珀
酰亚胺基)四
氟硼酸铀(
TSTU)将 
4-[18F]氟苯甲酸乙酯盐([18F]FBA)转化为[18F]SFB。纯化的[18F]SFB 用于标记 Tat 膜穿透肽(包含 Arg-Lys-Lys-Arg-Arg-Arg-Arg-Arg-Pro-Leu-Gly-Leu-Ala-Gly-Glu-Glu-Glu-Glu 序列,[18F]CPP)。未经校正的[18F]SFB放射
化学收率高达 25-35%(基于[18F]
氟化物)(n=10),合成时间为 40 分钟。在 30 分钟内,[18F]CPP 的未校正放射
化学收率为 10-20%(n=5)(基于[18F]SFB)。[18F]SFB和[18F]CPP的放射
化学纯度均大于95%。Copyright © 2010 John Wiley & Sons, Ltd. All Rights Reserved.