反应详情

To a slurry of 1.11 g of 8-(2-chloroethoxy)-7-methoxy-4-oxo-1,4-dihydrobenzo[g]quinoline-3-carbonitrile and 7-(2-chloroethoxy)-8-methoxy-4-oxo-1,4-dihydrobenzo[g]quinoline-3-carbonitrile (1:1 mixture) and 5 mL of phosphorus oxychloride is added 0.15 mL of anhydrous dimethylformamide. This is stirred and heated to reflux for 20 minutes using an oil bath, followed concentration in vacuo. The dark residue is quenched with 30 mL of cold water. The solid formed is collected, washed with water and dried to give 1.02 g (87%) of 4-chloro-7-methoxy-8(2-chloroethoxy)benzo[g]quinoline-3-carbonitrile and 4-chloro-8-methoxy-7(2-chloroethoxy)benzo[g]quinoline-3-carbonitrile (1:1 mixture) as a greenish yellow solid, m.p. 195-209° C. dec.

1. temperatureheated
2. temperatureto reflux for 20 minutes
3. concentrationconcentration in vacuo
4. customThe dark residue is quenched with 30 mL of cold water
5. customThe solid formed
6. customis collected
7. washwashed with water
8. customdried