HPLC-free <i>in situ</i><sup>18</sup>F-fluoromethylation of bioactive molecules by azidation and MTBD scavenging
作者:Yingqing Lu、Ji Young Choi、Sang Eun Kim、Byung Chul Lee
DOI:10.1039/c9cc04901k
日期:——
Sequential usage of azide and MTBD, which generates pure [18F]fluoromethyl tosylate and scavenges unreacted desmethyl precursors, provided an efficient HPLC-free strategy for the radio-synthesis of 18F-fluoromethylated compounds.
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.
New precursors for direct radiosynthesis of protected derivatives of O-([18F]Fluoromethyl) tyrosine
申请人:Bayer Schering Pharma Aktiengesellschaft
公开号:EP2540710A1
公开(公告)日:2013-01-02
The invention describes novel and stable precursors for the direct radiosynthesis of protected derivatives of O-([18F]Fluoromethyl) tyrosines, and methods for obtaining thoses compounds.
DIRECT SYNTHESIS OF 18F-FLUOROMETHOXY COMPOUNDS FOR PET IMAGING AND THE PROVISION OF NEW PRECURSORS FOR DIRECT RADIOSYNTHESIS OF PROTECTED DERIVATIVES OF O-([18F] FLUOROMETHYL) TYROSINE
申请人:Brumby Thomas
公开号:US20140309424A1
公开(公告)日:2014-10-16
The invention describes novel direct synthesis methods for converting a precursor into a PET-tracer with a
18
F-fluoromethoxy-group. The invention is also directed to novel and stable precursors for the direct radiosynthesis of protected derivatives of O—([
18
F]Fluoromethyl)tyrosines.
[EN] DIRECT SYNTHESIS OF 18F-FLUOROMETHOXY COMPOUNDS FOR PET IMAGING AND THE PROVISION OF NEW PRECURSORS FOR DIRECT RADIOSYNTHESIS OF PROTECTED DERIVATIVES OF O-([18F]FLUOROMETHYL) TYROSINE<br/>[FR] SYNTHÈSE DIRECTE DE COMPOSÉS DE 18F-FLUOROMÉTHOXY POUR L'IMAGERIE TEP ET UTILISATION DE NOUVEAUX PRÉCURSEURS POUR LA RADIOSYNTHÈSE DIRECTE DE DÉRIVÉS PROTÉGÉS DE O-([18F]FLUOROMÉTHYL)TYROSINE
申请人:PIRAMAL IMAGING SA
公开号:WO2013001088A1
公开(公告)日:2013-01-03
The invention describes novel direct synthesis methods for converting a precursor into a PET-tracer with a 18F-fluoromethoxy-group. The invention is also directed to novel and stable precursors for the direct radiosynthesis of protected derivatives of O- ([18F]Fluoromethyl) tyrosines.