反应详情

温度

70 °C

A solution of 4-hydroxy-3-(2-hydroxyethyl)-1-phenyl-1,8-naphthyridin-2 (1H) -one in Eaton's Reage P2O5 in methane sulfonic acid; 40 ml.) was stirred in an atmosphere of nitrogen and was heated to 70° C. for 2 hr. After cooling, the product was poured into water, adjusted to pH 4 with NaHCO3, filtered, washed with water, air dried and recrystallized from isopropanol with decolorization to yield the product, m.p. 245°-247° C.

1. temperatureAfter cooling
2. filtrationfiltered
3. washwashed with water, air
4. customdried
5. customrecrystallized from isopropanol with decolorization
6. customto yield the product, m.p. 245°-247° C.