Rapid one-step 18F-radiolabeling of biomolecules in aqueous media by organophosphine fluoride acceptors
Nature communications, 2019•nature.com
Currently, only a few 18F-radiolabeling methods were conducted in aqueous media, with
non-macroelement fluoride acceptors and stringent conditions required. Herein, we describe
a one-step non-solvent-biased, room-temperature-driven 18F-radiolabeling methodology
based on organophosphine fluoride acceptors. The high water tolerance for this isotope-
exchange-based 18F-labeling method is attributed to the kinetic and thermodynamic
preference of F/F over the OH/F substitution based on computational calculations and …
non-macroelement fluoride acceptors and stringent conditions required. Herein, we describe
a one-step non-solvent-biased, room-temperature-driven 18F-radiolabeling methodology
based on organophosphine fluoride acceptors. The high water tolerance for this isotope-
exchange-based 18F-labeling method is attributed to the kinetic and thermodynamic
preference of F/F over the OH/F substitution based on computational calculations and …
Abstract
Currently, only a few 18F-radiolabeling methods were conducted in aqueous media, with non-macroelement fluoride acceptors and stringent conditions required. Herein, we describe a one-step non-solvent-biased, room-temperature-driven 18F-radiolabeling methodology based on organophosphine fluoride acceptors. The high water tolerance for this isotope-exchange-based 18F-labeling method is attributed to the kinetic and thermodynamic preference of F/F over the OH/F substitution based on computational calculations and experimental validation. Compact [18/19F]di-tert-butyl-organofluorophosphine and its derivatives used as 18F-labeling synthons exhibit excellent stability in vivo. The synthons are further conjugated to several biomolecular ligands such as c(RGDyk) and human serum albumin. The one-step labeled biomolecular tracers demonstrate intrinsic target imaging ability and negligible defluorination in vivo. The current method thus offers a facile and efficient 18F-radiolabeling pathway, enabling further widespread application of 18F.
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