Lithium hydroxide, monohydrate → 1-(5-Chloro-6-(2,2,2-trifluoroethoxy)-4'-(trifluoromethyl)biphenyl-3-yl)-cyclopentane carboxylic acid

A mixture of compound ethyl 1-(5-chloro-6-(2,2,2-trifluoroethoxy)-4′-(trifluoromethyl)biphenyl-3-yl)-cyclo pentane carboxylate (100 mg, 0.21 mmol) and lithium hydroxide monohydrate (96 mg, 2.1 mmol) in a MeOH/THF/Water solvent mixture (5 ml/5 ml 5/ml) was stirred for 3 h at room temperature. After completion of reaction, the volatiles were removed under reduced pressure. The residue was diluted with water, acidified with 5% HCl solution and extracted with ethyl acetate (3×50 mL). The combined organic layers were washed with water, dried over Na2SO4, filtered and evaporated under reduced pressure. The residue was purified by Flash Column Chromatography to give 1-(5-chloro-6-(2,2,2-trifluoroethoxy)-4′-(trifluoromethyl)biphenyl-3-yl)-cyclopentane carboxylic acid (0.05 g). 1H-NMR (CDCl3, 500 MHz): 7.72 (d, 2H); 7.65 (d, 2H), 7.56 (s, 1H); 7.34 (s, 1H); 3.98 (q, 2H); 2.68 (m, 2H); 1.94 (m, 2H); 1.78 (m, 4H).

1. customAfter completion of reaction
2. customthe volatiles were removed under reduced pressure
3. additionThe residue was diluted with water
4. extractionextracted with ethyl acetate (3×50 mL)
5. washThe combined organic layers were washed with water
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. customevaporated under reduced pressure
9. customThe residue was purified by Flash Column Chromatography

ORD-Eintrag

ord-46f27728d6a14b4888d838d660c027d8

Quelldatensatz

uspto-grants-2013_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08367863B2