Nitroethane → Amphetamine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of 1.902 q (12.68 mmol) of 3-carboxybenzaldehyde in 10 mL of glacial acetic acid, was added 2.848 mL (2.970 g, 38.04mmol) of nitroethane and 1.080 g (13.95 mmol) of ammonium acetate. The solution was then heated with stirring under nitrogen in a 110° C. oil bath. Then, all of the solid went into solution near 60° C. and the mixture turned a deep yellow color. After 3 hours, thin layer chromatography with 3:1 hexane/EtOAc indicated that no starting material remained. The reaction mixture was cooled to room temperature, and then partitioned between water and methylene chloride, with acidification to about pH2 with 6 M HCl. The organic layer was washed with 6 M HCl, then dried with magnesium sulfate. The solvents were then removed with a rotary evaporator, yielding 2.768 g (98%) of crude material, which was carried on without further purification because of the difficulty of chromatographing the very polar carboxylic acid.

Herkunft & Nachweise