Acetic Acid → 1-(4-(4-((Cyclobutylamino)methyl)-3-fluorophenyl)piperazin-1-yl)ethanone

Participants

Reaction Steps

To a solution of cyclobutanamine (1.26 mL, 14.7 mmol) and 4-(4-acetylpiperazin-1-yl)-2-fluoro-benzaldehyde (3.68 g, 14.7 mmol) in dichloroethane (50 mL) was added sodium triacetoxyborohydride (4.39 g, 20.6 mmol) followed by acetic acid (0.84 mL, 14.7 mmol) and the reaction was stirred at ambient temperature for 16 hours. 1 N aqueous NaOH was then added to basify the reaction and the product was extracted with Et2O (×3), washed with brine, dried with MgSO4, concentrated and dried in vacuo to give 1-[4-[4-[(cyclobutylamino)methyl]-3-fluoro-phenyl]piperazin-1-yl]ethanone (4.76 g, 99% yield). The product was used without purification. LCMS (m/z) ES+ 306 [M+1]+.

Provenance & Evidence