Carbon Dioxide → HCID 13726377, Verbindung

Temperatur

-78 °C

11 ml of BuLi (1M in hexane) were added dropwise at −78° C. to a solution of 1.9 ml (11 mmol) of DIPEA in THF (77 ml). After stirring for 30 min at −78° C., a solution of 2.31 g (10 mmol) of 2-chloro-7-(trifluoromethyl)quinoline in THF (30 ml) was added and stirring was carried out for a further 30 min at −78° C. The reaction solution was then poured onto finely divided, solid CO2. After heating to RT, most of the THF was removed in vacuo. A 1M aq. NaOH soln. was then added and the phases were separated. The aqueous phase was acidified with 10% hydrochloric acid and extracted with EA. The organic phase was washed with water and brine, dried over Na2SO4, filtered and concentrated in vacuo. There were obtained as residue 2.12 g (7.7 mmol, 71%) of 2-chloro-7-(trifluoromethyl)quinoline-3-carboxylic acid, which was reacted further without additional purification.

1. stirringstirring
2. waitwas carried out for a further 30 min at −78° C
3. additionThe reaction solution was then poured
4. customwas removed in vacuo
5. additionwas then added
6. customthe phases were separated
7. extractionextracted with EA
8. washThe organic phase was washed with water and brine
9. dry with materialdried over Na2SO4
10. filtrationfiltered
11. concentrationconcentrated in vacuo

ORD-Eintrag

ord-d1802e31d2f249cd96009f8b41521c67

Quelldatensatz

uspto-grants-2012_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08207342B2