Ammonium → 2-Chloro-4-methyl-7-aminoquinoline

Participants

Reaction Steps

To 27 g (251 mmol) of m-phenylenediamine was added 32 ml (251 mmol) of ethyl acetoacetate, followed by stirring at 200 degrees for 1 hour. After standing to cool, the crystals were washed with hexane. To 9.5 g (54 mmol) of the crystals was added 15 ml of phosphorus oxychloride, followed by heating under reflux for 2 hours. After standing to cool, the reaction mixture was poured onto ice-water and basified with a saturated ammonium aqueous solution. The resulting crystals were collected by filtration and washed with water. The crystals were washed with methanol and the filtrate was evaporated, to give 4.85 g of the title compound.

Provenance & Evidence