Dimethylformamide → 2,6-Dichloro-4-morpholin-4-YL-benzaldehyde

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To a solution of to a solution of 4-(3,5-dichlorophenyl)-morpholine (1.60 g, 6.93 mmol) in dry THF (20 mL) under N2 at −78° C. was added dropwise sec-BuLi (1.4M in cyclohexane, 5.44 mL). The solution was allow to stir for 30 min then DMF (2.68 mL, 34.7 mmol) was slowly added to the. Upon disappearance of the starting material by TLC, the reaction was warmed to 0° C. then was quench by addition of H2O (15 mL). The mixture was extracted with EtOAc (150 mL), the organic phase was dried over Na2SO4 and the solvent was evaporate under reduced pressure. The resulting solid was triturated with Et2O to yield 2,6-dichloro-4-morpholin-4-yl-benzaldehyde as an off white solid. 1H NMR (400 MHz, Acetonitrile-d3): δ 10.44 (s, 1H), 7.06 (s, 2H), 3.85-3.93 (m, 4H), 3.46-3.54 (m, 4H). MS (m/z) 260.0 (M+1).

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