Acetic Anhydride → (S)-1-(2-benzyl-4-(3-(cyclopentyloxy)-4-methoxyphenyl)piperazin-1-yl)ethanone

Participants

Reaction Steps

A solution of the bis-hydrochloride salt of (S)-3-Benzyl-1-(3-cyclopentyloxy-4-methoxy-phenyl)-piperazine in pyridine (1 mL) was treated with acetic anhydride (32 μL, 0.34 mmol) and stirred for 16 h. The reaction mixture was evaporated and partitioned between EtOAc (2 mL) and a saturated aqueous NaHCO3 solution (2 mL). The organic component was separated, dried over MgSO4, filtered, and evaporated to residue which was purified by silica gel flash chromatography with EtOAc as eluant to afford the title compound as an oil (45 mg, 97%). LC/MS (Method A) 6.88 min, [M+1]+ 409.

Provenance & Evidence