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Syntheses of functionalised 18O‐(hydroxymethyl)phenols from 4‐hydroxybenzaldehyde (16). Abbreviations: TBABr3: tetrabutylammonium tribromide; THF: tetrahydrofurane; TIPS‐GHB: 4‐((triisopropylsilyl)oxy)butanoate; EDC: 1‐ethyl‐3‐(3‐dimethylaminopropyl)carbodiimide; DMAP: 4‐dimethylaminopyridine; DMF: dimethylformamide; Fmoc‐5‐Ava‐OH: 5‐(Fmoc‐amino)valeric acid; TBTU: 2‐(1H‐benzotriazole‐1‐yl)‐1,1,3,3‐tetramethylaminium tetrafluoroborate; DIPEA: diisopropylethylamine.
