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. Author manuscript; available in PMC: 2016 May 6.
Published in final edited form as: J Am Chem Soc. 2015 Apr 22;137(17):5686–5694. doi: 10.1021/jacs.5b02659

Figure 1.

Figure 1

Proposed mechanism for TiO2-catalyzed radiofluorination. SN2 substitution is improved with alcohol as a co-solvent, perhaps by inclusion in intermediate complex formation as determined by Oh et al.30 (not shown on scheme).