Acetone → (3-Benzyloxyphenyl)acetic acid

To 50 ml of methanol was added 3-hydroxyphenyl acetic acid (7.61 g, 0.05 mol). The mixture was cooled in an ice bath and then thionyl chloride was added (3.6 ml, 0.05 mol). The mixture was refluxed for 4 hrs and methanol was evaporated. The residue was extracted with ethyl acetate and sodium bicarbonate solution. The organic layer was dried and evaporated to give an oil (8.90 g). This oil was dissolved in 150 ml of acetone containing benzyl bromide (9.17 g, 0.053 mol) and potassium carbonate (16.9 g, 0.16 mol). The mixture was stirred at room temperature overnight. The solid was removed through filtration and solvents was evaporated. The residue was extracted with ethyl acetate and sodium bicarbonate solution. The organic layer was dried and evaporated. The residue was suspended in 70 ml of methanol and 1N sodium hydroxide solution was added (70 ml). The mixture was refluxed for 1 hr and solvents were evaporated. The residue was dissolved in 150 ml of water and extracted with ether. The aqueous layer was acidified with 1N hydrochloric acid and the white precipitate was filtered to give 3-benzyloxyphenyl acetic acid (11.0 g, 91%).

1. customThe solid was removed through filtration and solvents
2. customwas evaporated
3. extractionThe residue was extracted with ethyl acetate and sodium bicarbonate solution
4. customThe organic layer was dried
5. customevaporated
6. addition1N sodium hydroxide solution was added (70 ml)
7. temperatureThe mixture was refluxed for 1 hr
8. customsolvents were evaporated
9. dissolutionThe residue was dissolved in 150 ml of water
10. extractionextracted with ether
11. filtrationthe white precipitate was filtered

ORD record

ord-d2f152e067b84255aee584462cdeeb47

Source dataset

uspto-grants-2006_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07067529B2