tert-Butyl piperazine-1-carboxylate → tert-Butyl-4-[2-(4-methyl-1-oxo-1,3-dihydro-2-benzofuran-5-yl)propyl]piperazine-1-carboxylate

Participants

Reaction Steps

In a 100 mL round bottom flask, 2-(4-methyl-1-oxo-1,3-dihydro-2-benzofuran-5-yl)propanal (100 mg, 0.49 mmol, 1.0 eq) and Boc-piperazine (91 mg, 0.49 mmol, 1.0 eq) was dissolved in DCM (10 mL). To above solution was added sodium triacetoxyborohydride (208 mg, 0.98 mmol, 2.0 eq). The reaction was stirred at r.t. for 16 hr. The reaction was then diluted with DCM (10 mL), washed with aqueous bicarbonate, water and brine. The organic phase was dried over MgSO4, filtered and concentrated. The product was obtained after purification by flash column chromatography (5% MeOH/DCM). LC-MS (IE, m/z): 375.41 [M+1]+; tR=2.47 min.

Provenance & Evidence