Sodium Hydroxide → 2-(quinolin-8-yloxy)propanoic acid

To a solution of ethyl 2-(quinolin-8-yloxy)propanoate (100 mg, 0.4 mmol) in EtOH (1 ml) was added a solution of NaOH (24 mg, 0.6 mmol) in H2O (0.5 ml) at 27° C. The mixture was stirred for 30 min at 27° C. The mixture was then concentrated and the residue treated with water (5 mL) and extracted with ethyl acetate (2×5 mL). The water layer was then treated with 2N HCl until pH 3 before being extracted with ethyl acetate (2×5 ml). The organic layer was washed with brine (30 mL), dried over Na2SO4 and concentrated to give the title product (70 mg, 80.5%) as a white solid which was used in next step without further purification.

1. concentrationThe mixture was then concentrated
2. additionthe residue treated with water (5 mL)
3. extractionextracted with ethyl acetate (2×5 mL)
4. additionThe water layer was then treated with 2N HCl until pH 3
5. extractionbefore being extracted with ethyl acetate (2×5 ml)
6. washThe organic layer was washed with brine (30 mL)
7. dry with materialdried over Na2SO4
8. concentrationconcentrated

ORD-Eintrag

ord-aa508b1492104f9397b3f2899e18327a

Quelldatensatz

uspto-grants-2016_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09266836B2