Hydrochloric Acid → 2-Hydroxy-4,5-dimethoxybenzaldehyde

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

In a three-necked flask, disperse 40.8 g of aluminium chloride in 200 ml of dichloromethane with stirring. Cool the solution to 0° C. Pour in dropwise a solution of 20 g (0.101 mol) of 3,4,6-trimethoxybenzaldehyde dissolved in 100 ml of dichloromethane. Allow the temperature to rise again to 19° C. and stir for 45 min. Hydrolyse the reaction mixture with 400 g of water and ice and then add 100 ml of 1N HCl and stir for 30 minutes. Allow to separate and then extract with 200 ml of dichloromethane. The organic phase is washed with 100 ml of 1N HCl, 100 ml of water and 100 ml of saturated aqueous NaCl solution, and then dried over MgSO4, filtered and evaporated to dryness. 16.4 g of title product are obtained.

Herkunft & Nachweise