Acetic Acid → HCID 43123011, compound

Participants

Reaction Steps

Combine 3-chloro-2-fluoroaniline (4.37 g, 30 mmol), 1-methylpiperidin-4-one (3.39 g, 30 mmol), sodium triacetoxyborohydride (5.26 g, 33 mmol), and acetic acid (5.4 g, 90 mmol) and stir at room temperature overnight. Partition the reaction mixture between dichloromethane and saturated aqueous NaCl containing NH4OH, dry over anhydrous sodium sulfate, evaporate and purify on a silica gel column (110 g), using a gradient of dichloromethane-2M NH3 in methanol to give 2.34 g of the title compound (32% yield): mass spectrum (ion spray): m/z=243 (M+1); 1H NMR (CDCl3): 6.88 (ddd, 1H), 6.63 (ddd, 1H), 6.56 (dd, 1H), 3.85 (br d, 1H), 3.28 (m, 1H), 2.80 (m, 2H), 2.30 (s, 3H), 2.13 (m, 2H), 2.04 (m, 1H), 1.53 (m, 2H). (file: mn4-b6k-284-2)

Provenance & Evidence