Ethanol, 2-chloro-, 1-(4-methylbenzenesulfonate) → 2-(2-Chloroethoxy)benzaldehyde

Beteiligte Stoffe

Reaktionsschritte

40.0 g of 2- hydroxybenzaldehyde, 84 g of 1-chloro-2-tosyloxyethane and 50 g of potassium carbonate are added to 270 ml of dimethylformamide, and the mixture is stirred at room temperature for 3 days. After the reaction, half of the solvent is distilled off under reduced pressure. About 600 ml of water are added to the residue, and the mixture is extracted with ether. The extract is washed with 10% sodium hydroxide solution and water, dried and then distilled to remove the solvent. The residue is distilled at 116°-118° C./0.2-0.3 mmHg to give 2-(2-chloroethyloxy)benzaldehyde (51.9 g, yield: 86%) as a coloress oil. The properties of this compound are the same as those disclosed in J.O.C., 18, 1380-1402 (1953).

Herkunft & Nachweise