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1yield ' H NMR (CDC13) 6 1.28 (d, 3 H, J = 6 Hz, CH3CH), 2.23 (s,3 H, O(CH3)C=C), 4.74 (q, 1 H, HlO), 5.85 (d, J = 3 Hz, H3, A small amount of the unsaturated ketone 9 was also isolated in about 15% yield mp 110-112 OC; ' H NMR (CDC13) 6 1.36 (d, HlO), 5.04 (dd, J = 2, 16 Hz, H3), 6.60 (dd, J = 4.5, 6 Hz, H4); +2.99O (CHCI,); mass spectrum, mle (CI isobutane) 229 (loss of HzO). Both 8 and 9 could be isolated by chromatography on reverse-phase silica by elution with 10% acetonitrile-water.Acetylation of 2,BDisubstituted Furan. The hydroxy 2,5-disubstituted furan 8a (0.310 g, 1.36 mmol) was acetylated with a mixture of acetic anhydride (0.60 mL) and pyridine (0.72

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