Formaldehyde → HCID 66593552, compound

Participants

Reaction Steps

(R)—N-(4-Amino-3-nitrophenyl)piperidine-2-carboxamide (2.09 g, 7.9 mmol) was dissolved in MeOH (50 mL), and paraformaldehyde (0.95 g) and sodium cyanoborohydride (0.50 g, 8.0 mmol) were added. The mixture was stirred at room temperature for 70 min, and water added dropwise. The solvent was evaporated and the residue partitioned between water and EA (150 mL each). The phases were separated and the aqueous phase extracted with EA (2×100 mL). The combined EA layers were washed with brine, dried over magnesium sulfate, and concentrated to give (R)—N-(4-amino-3-nitrophenyl)-1-methylpiperidine-2-carboxamide as an orange foam (2.17 g), which was used without purification.

Provenance & Evidence