METHOD FOR PREPARING FLUORINE-18-LABELED FLUOROMETHYL-SUBSTITUTED RADIOPHARMACEUTICALS USING SELECTIVE AZIDE SUBSTITUTION REACTION AND PRECURSOR SCAVENGING
申请人:Bik Therapeutics Inc.
公开号:US20210205482A1
公开(公告)日:2021-07-08
A method for preparing a fluorine-18-labeled fluoromethyl-substituted radiopharmaceutical using a selective azide substitution reaction includes (1) obtaining a [
18
F]fluoride from a cyclotron through an
18
O(p,n)
18
F reaction; (2) separating the [
18
F] fluoride using an acetonitrile reaction solution containing dissolved K
2,2,2
and K
2
CO
3
to obtain a [
18
F]F
−
/H
2
18
O solution; (3) heating the [
18
F]F
−
/H
2
18
O solution to obtain K
2,2,2
/K
18
F; (4) placing the K
2,2,2
/K
18
F along with a bis(tosyloxy)methane compound into a reactor and adding a reaction solvent to cause a reaction and obtain a first precursor solution; (5) cooling the first precursor solution and adding an azide reagent to cause an azide substitution reaction and obtain a [
18
F]fluoromethyltosylate compound; (6) adding a bioactive molecule to the [
18
F]fluoromethyltosylate compound to cause an alkylation reaction and obtain a second precursor solution; and (7) adding a precursor scavenger to the second precursor solution and scavenging unreacted precursors to produce a fluorine-18-labeled fluoromethyl-substituted radiopharmaceutical.
一种制备氟-18标记的氟甲基取代放射性药物的方法包括:(1)通过选择性叠氮取代反应从超导环中获得[18F]氟化物;(2)使用含有溶解的K2,2,2和K2CO3的乙腈反应溶液分离[18F]氟化物,以获得[18F]F−/H218O溶液;(3)加热[18F]F−/H218O溶液以获得K2,2,2/K18F;(4)将K2,2,2/K18F与双对甲苯磺酰氧基甲烷化合物放入反应器中,并加入反应溶剂引起反应,获得第一前体溶液;(5)冷却第一前体溶液,并加入叠氮试剂引起叠氮取代反应,获得[18F]氟甲基对甲苯磺酸酯化合物;(6)将生物活性分子加入[18F]氟甲基对甲苯磺酸酯化合物中引起烷基化反应,获得第二前体溶液;(7)向第二前体溶液中加入前体清除剂,并清除未反应的前体,以制备氟-18标记的氟甲基取代放射性药物。