Water → HCID 12810475, compound

To 3.7 g (20.3 mmol) of 4-(hydroxyethoxy)benzoic acid, 100 ml of dry THF and 5.3 g (50.75 mmol) of cyclopropylcarboxylic acid chloride, at 0°, is added 6.6 ml (81.2 mmol) of pyridine. The mixture is allowed to warm to RT and is stirred at RT for 6 days, after which it is filtered. The filtrate is stirred, at RT, with 0.7 ml (~40.6 mmol) of water for 6 days. Solvent is removed by rotoevaporation, and 150 ml of ethyl acetate, 150 ml of water and 40 ml of aqueous 3 N sulfuric acid are added to the residue. The aqueous layer is separated and extracted once with 50 ml of ethyl acetate. The combined organic layers are washed with water (100 ml), with aqueous saturated cupric sulfate (50 ml), again with water (100 ml) and with aqueous saturated sodium chloride (50 ml) and are then dried over calcium sulfate. Solvent is removed by rotoevaporation, and the crude product is washed with 20 ml hexane (3×) and dried to yield 4-(2-cyclopropylcarbonyloxyethoxy)benzoic acid.

1. filtrationafter which it is filtered
2. customSolvent is removed by rotoevaporation, and 150 ml of ethyl acetate, 150 ml of water and 40 ml of aqueous 3 N sulfuric acid
3. additionare added to the residue
4. customThe aqueous layer is separated
5. extractionextracted once with 50 ml of ethyl acetate
6. washThe combined organic layers are washed with water (100 ml), with aqueous saturated cupric sulfate (50 ml), again with water (100 ml) and with aqueous saturated sodium chloride (50 ml)
7. dry with materialare then dried over calcium sulfate
8. customSolvent is removed by rotoevaporation
9. washthe crude product is washed with 20 ml hexane (3×)
10. customdried

ORD record

ord-0267aed5a7bb42839998702324197d42

Source dataset

uspto-grants-1981_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04304924