Sodium Hydroxide → (E)-3-cycloheptyl-2-(4-(methanesulfonyl)-3-(trifluoromethyl)-phenyl)-acrylic acid

A solution of (E)-3-cycloheptyl-2-(4-methanesulfonyl-3-trifluoromethyl-phenyl)-acrylic acid methyl ester (387 mg, 0.96 mmol) in ethanol (6 mL) was treated with a 1N aqueous sodium hydroxide solution (2 mL). The solution was heated at 45-50° C. for 15 h, at which time, thin layer chromatography analysis of the mixture indicated the absence of starting material. The reaction mixture was then concentrated in vacuo to remove ethanol, and the residue was diluted with water (20 mL) and extracted with diethyl ether (1×30 mL) to remove any neutral impurities. The aqueous layer was acidified with a 1N aqueous hydrochloric acid solution. The resulting acid was extracted into ethyl acetate (2×35 mL). The combined organic layers were washed with a saturated aqueous sodium chloride solution (1×100 mL), dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo to afford the (E)-3-cycloheptyl-2-(4-(methanesulfonyl)-3-(trifluoromethyl)-phenyl)-acrylic acid (268 mg, 72%) as a brown solid: mp 151-156° C.

1. concentrationThe reaction mixture was then concentrated in vacuo
2. customto remove ethanol
3. additionthe residue was diluted with water (20 mL)
4. extractionextracted with diethyl ether (1×30 mL)
5. customto remove any neutral impurities
6. extractionThe resulting acid was extracted into ethyl acetate (2×35 mL)
7. washThe combined organic layers were washed with a saturated aqueous sodium chloride solution (1×100 mL)
8. dry with materialdried over anhydrous magnesium sulfate
9. filtrationfiltered
10. concentrationconcentrated in vacuo

ORD-Eintrag

ord-0e148c47b37c425b998dc74419a707a3

Quelldatensatz

uspto-grants-2002_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06353111B1