Tetrabutylammonium Fluoride → Methyl 4-(hydroxymethyl)-5-methylfuran-2-carboxylate

A stirred solution of 5-methyl-4-triisopropylsilanyloxymethyl-furan-2-carboxylic acid methyl ester (15) (5.2 g) in tetrahydrofuran (200 mL) was treated with tetrabutylammonium fluoride (1.0 M solution in tetrahydrofuran, 3.2 mL) and stirring continued for 16 hours. The reaction mixture was concentrated in vacuo and the residue taken up in ethyl acetate (350 mL) and washed with water (150 mL). The aqueous phase was re-extracted with ethyl acetate (2×100 mL). The combined extracts were dried, concentrated in vacuo and the residue was purified by flash chromatography eluting with ethyl acetate/pentane (1:1 by volume) to give compound 16 as a yellow oil.

1. concentrationThe reaction mixture was concentrated in vacuo
2. washwashed with water (150 mL)
3. extractionThe aqueous phase was re-extracted with ethyl acetate (2×100 mL)
4. customThe combined extracts were dried
5. concentrationconcentrated in vacuo
6. customthe residue was purified by flash chromatography
7. washeluting with ethyl acetate/pentane (1:1 by volume)

ORD-Eintrag

ord-f275f8a838d74f7e9e534b8303c94fac

Quelldatensatz

uspto-grants-2009_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07528157B2