Dimethylformamide → HCID 20298687, compound

Participants

Reaction Conditions

Reaction Steps

A stirred solution of 25 g of 2-hydroxy-5-methoxybenzaldehyde in 125 ml. of dimethylformamide is treated portionwise with 8.2 g of 50% sodium hydride (oil dispersion). The temperature is kept below 35° C. by means of an ice-water bath. When the addition is complete, the mixture is warmed to 70° C. and cooled to 25° C. This is followed by the addition of a solution of 36 g. of N-(3-chloropropyl)morpholine in 65 ml. of toluene. The mixture is stirred and heated at 100°-105° C. for 4 hours, cooled, poured into 300 ml. of ice-water and extracted with three 150 ml. portions of ether. The combined ether layers are then extracted with 40 ml. of cold 1:1 hydrochloric acid, followed by 20 ml. of water. The aqueous phases are combined, layered over with 150 ml. of ether, stirred and basified with 40 g. of potassium carbonate. The layers are separated and the aqueous phase is extracted with three 100 ml. portions of ether. The combined ether layers are dried over magnesium sulfate. The solvent is removed on a rotary evaporator and the residue is distilled to give 34 g. of the title compound, boiling point 180°-185° C. at 0.1-0.2 mm of Hg.

Provenance & Evidence