Ammonium Chloride → Methyl 2-azido-3-(2-methoxy-3-methylphenyl)acrylate

Participants

Reaction Steps

To the mixture of 2.46 g of 2-methoxy-3-methylanisaldehyde (16 mmol) and 4.72 g of methyl azidoacetate (41 mmol) in 20 mL of MeOH is added 7.6 mL of 5.4M MeONa over 30 minute at −10 degrees. After addition the mixture was stirred for additional hour at the same temperature and then transferred in cold room (4 degrees) and stirred overnight. On the morning reaction mixture was poured in 0.5 L mixture of ice and conc. ammonium chloride solution, stirred for 10 minutes and filtered off. The solid was washed with plenty of ice cold water and then moved at ambient temperature. After air drying for 1 hr the solid was dissolved in 50 mL of DCM, dried over magnesium sulfate and passed through short silica gel plug. Evaporation of solvent produced 3.5 g of methyl 2-azido-3-(2-methoxy-3-methylphenyl)acrylate, that was used in the next step without further purification.

Provenance & Evidence