Ethyl Acetate → Benzyl ethyl piperidine-1,3-dicarboxylate

Participants

Reaction Steps

A 250-mL round-bottomed flask was charged with a solution of NaHCO3 (10.7 g, 127.38 mmol, 2.00 equiv) in H2O (80 mL), ethyl piperidine-3-carboxylate (10 g, 63.69 mmol, 1.00 equiv) and benzyl carbonochloridate (11.9 g, 70.00 mmol, 1.10 equiv). The resulting solution was stirred for 16 hours at room temperature. The progress was monitored by TLC (EtOAc: PE=1:5). Upon completion, the resulting solution was extracted with ethyl acetate (3×50 mL). Combined organic layers were dried over anhydrous sodium sulfate. The solids were filtered out. The resulting mixture was concentrated on a rotary evaporator. The residue was purified by a silica gel column chromatography eluted with ethyl acetate/petroleum ether (1:100) afford 1-benzyl 3-ethyl piperidine-1,3-dicarboxylate as pale yellow oil (11.4 g, (62%).

Provenance & Evidence