Phosphorus oxychloride → 2-Chloroquinolin-8-ol

Temperatur

100 °C

A mixture of 2,8-dihydroxyquinoline (4 g, 24.8 mmol, Fluka) and phosphorus oxychloride (20 mL, Aldrich) was stirred at 100° C. for 1 h. The clear solution was cooled to room temperature and poured slowly with stirring into a mixture of NH4OH (150 mL) and crushed ice (200 g). The white solid that precipitated was filtered, dissolved in concentrated HCl (200 mL) and stirred at 100° C. for 1 h. Neutralization of the cooled to room temperature acid solution with NH4OH afforded white precipitate, which was filtered, washed with water and dried to give the title compound as a white solid. MS (ESI, pos. ion) m/z: 180 (M+1).

1. temperatureThe clear solution was cooled to room temperature
2. additionpoured slowly
3. customThe white solid that precipitated
4. filtrationwas filtered
5. dissolutiondissolved in concentrated HCl (200 mL)
6. stirringstirred at 100° C. for 1 h
7. temperatureNeutralization of the cooled to room temperature acid solution with NH4OH afforded white precipitate, which
8. filtrationwas filtered
9. washwashed with water
10. customdried

ORD-Eintrag

ord-de19be1e8d5a4ca0b95dd33164587ac9

Quelldatensatz

uspto-grants-2009_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07582761B2