Efficient synthesis of 9-(4-[18F]fluoro-3-hydroxymethylbutyl)guanine ([18F]FHBG) and 9-[(3-[18F]fluoro-1-hydroxy-2-propoxy)methyl]guanine ([18F]FHPG)
作者:Jie Liu、Jorge R. Barrio、Nagichettiar Satyamurthy
DOI:10.1016/j.jfluchem.2017.08.007
日期:2017.9
A new, high radiochemical yield synthesis of [18F]FHBG and [18F]FHPG, the most popular imaging agents currently in use for monitoring gene therapy using positron emission tomography (PET), is reported in this work. Protection of sensitive sites in the precursors generally utilized for the preparation of [18F]FHBG and [18F]FHPG using the nucleophilic 18F-fluorination reaction was found to be critical
这项工作报道了[ 18 F] FHBG和[ 18 F] FHPG的新的高放射化学收率合成,这是目前正用于监测使用正电子发射断层扫描(PET)进行基因治疗的最流行的成像剂。发现通常使用亲核的18 F-氟化反应来保护制备[ 18 F] FHBG和[ 18 F] FHPG的前体中的敏感位点,对于合成方法的良好放射化学收率,可靠性和可重复性至关重要。最初的方法是在当前使用的单甲氧基三苯甲基保护的喷昔洛韦甲苯磺酸酯衍生物9的鸟嘌呤部分的O 6氧处进行保护。与氨基甲酰基一起进行。随后,两者的充分保护ö 6 -氧和Ñ 2 -氮在单甲氧保护喷昔洛韦和更昔洛韦甲苯磺酸酯类似物9和10,通过它们的反应与二-实现叔丁基二碳酸酯,这导致ö 6 -叔-丁基- ñ 2 -Boc单甲氧保护的喷昔洛韦甲苯磺酸酯18和ö 6 -叔丁基- ñ 2 -Boc单甲氧保护的更昔洛韦甲苯磺酸酯19, 分别。首先将新合成的氨基甲酰基和Boc保护的前体与与Kryptofix