3-Furanol, tetrahydro- → Triphenylphosphine Oxide

Participants

Reaction Conditions

Reaction Steps

Diethyl azodicarboxylate (2.09 g) was added to a stirred mixture of ethyl 3-hydroxybenzoate (1.662 g), 3-hydroxytetrahydrofuran (0.881 g), triphenylphosphine (3.41 g) and THF (40 ml) which had been cooled to 0° C. The resultant mixture was allowed to warm to ambient temperature and was stirred for 18 hours. The mixture was evaporated and the residue was triturated under a 9:1 mixture of hexane and ethyl acetate. The solid triphenylphosphine oxide so formed was filtered off. The filtrate was evaporated and the residue was purified by column chromatography on silica using a 99:1 mixture of methylene chloride and methanol as eluent. There was thus obtained ethyl 3-(tetrahydrofuran-3-yloxy)benzoate (1.56 g); NMR Spectrum: (DMSOd6) 1.27 (t, 3H), 1.93 (m, 1H), 2.22 (m, 1H), 3.82 (m, 4H), 4.27 (m, 2H), 5.08 (m, 1H), 7.19 (m, 1H), 7.42 (m, 2H), 7.52 (d, 1H).

Provenance & Evidence