Phosphorus oxychloride → 251902-62-2

Participants

Reaction Steps

A suspension of ethyl 4-methyl-2-oxo-1,2-dihydro-3-quinolinecarboxylate (obtained according to 3.a, 15.2 g, 0.066 mol) in phosphoryl chloride (243 ml) is taken to reflux for 6 hours. The phosphoryl chloride is evaporated under reduced pressure without taking to dryness, and the viscous residue is poured into ice cold water (300 ml). The precipitate obtained in this way is filtered, washed with water to a neutral pH, then washed with ethanol and with diethyl ether in order to produce after drying 8.8 g (53%) of a white solid, m.p. 110° C.

Provenance & Evidence