Tetrabutylammonium Fluoride → (4-Hydroxymethyl-5-methyl-furan-2-yl)-acetic acid ethyl ester

A solution of (5-methyl-4-triisopropylsilanyloxymethyl-furan-2-yl)-acetic acid ethyl ester (29) (0.5 g) in tetrahydrofuran (3.0 mL) was cooled to 0° C. with stirring and treated with tetrabutylammonium fluoride (1.0 M solution in tetrahydrofuran, 2.82 mL) under argon. After 30 minutes, the resulting solution was concentrated in-vacuo and partitioned between water (30 mL) and ethyl acetate (4×25 mL). The combined organic extracts were washed with brine (50 mL), dried (Na2SO4), filtered and concentrated in vacuo. The residue was purified by flash chromatography eluting with diethyl ether/petroleum ether (1:1 by volume) to give compound 30 as a clear oil (188 mg). LC/MS System A: Rt=2.34 mins.

1. concentrationthe resulting solution was concentrated in-vacuo
2. custompartitioned between water (30 mL) and ethyl acetate (4×25 mL)
3. washThe combined organic extracts were washed with brine (50 mL)
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by flash chromatography
8. washeluting with diethyl ether/petroleum ether (1:1 by volume)

ORD record

ord-8d40e02461f94836b554b430ff35d267

Source dataset

uspto-grants-2009_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07507754B2