Hydrochloric Acid → Methyl 6,6a,7,8,9,10-hexahydro-6-oxo-5H-pyrido[1,2-a]quinoxaline-3-carboxylate

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Reaction Steps

Methyl 1-(4-(methoxycarbonyl)-2-nitrophenyl)piperidine-2-carboxylate (1.3 g, 4.0 mmole) was dissolved in EtOAc (20 mL) and 1N HCl (20 mL) and to the solution was added Zinc (0.80 g). The reaction mixture was reflux overnight then cooled to room temperature. The organic layer was washed with water and dried over anhydrous magnesium sulfate. After filtration, the solvent was removed to give Methyl 6,6a,7,8,9,10-hexahydro-6-oxo-5H-pyrido[1,2-a]quinoxaline-3-carboxylate (0.92 g, 88%).

Provenance & Evidence