Phosphorus oxychloride → 7-(Benzyloxy)-4-chloro-6-methoxyquinoline

Participants

Reaction Conditions

Reaction Steps

A mixture of 7-benzyloxy-6-methoxy-4-quinolone (9.72 g 34.5 mmol) and phosphorus oxychloride (130 ml) was stirred at 110° C. for 3 hours. The stirred mixture was concentrated at atmospheric pressure. The residue was dissolved in chloroform (150 ml), then ice and water was added to the solution. The mixture was rendered weakly alkaline by the addition of saturated sodium carbonate solution. The two phases were separated, the aqueous layer was extracted with chloroform. The extract was washed with water, dried over sodium sulfate, and the solvent was removed by evaporation under the reduced pressure. The residue was solidified under diisopropyl ether to give 9.82 g of product [E]. Yield: 94%.

Provenance & Evidence