Compound 3m
(R)-3-chloro-2-fluoro-6-(1-fluoroethyl)benzaldehyde
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Synthetic procedure: See article for the definitive version of this procedure and for full experimental details.
1m was fluorinated following general procedure B described for compound 3k (57% NMR yield of 3m). Due to volatility, 3m was directly converted into 5m for characterization.