反应详情

To a vigorously stirred suspension of 5-(tetradecyloxy)furan-2-carboxylic acid (0.162 g, 0.5 mmol) in 10 mL of N,N-dimethylformamide was added 1-bromo-4-methylpentane (0.247 g, 1.5 mmol), cesium carbonate (0.243 g, 0.75 mmol) and sodium iodide (˜20 mg). The suspension appeared to go into solution briefly, and then a very finely dispersed white precipitate was observed. The reaction was allowed to stir for 12 hrs at which time HPLC analysis of the reaction solution indicated complete conversion of TOFA to a less polar product. The suspension was diluted with EtOAc (40 mL), brine (20 mL) and water (20 mL). The phases were separated and the organic phase was washed with water (20 mL) and brine (20 mL) and then dried and concentrated. The resulting crude material was purified by flash chromatography eluting with 0-20% EtOAc in hexanes to yield 0.127 g (62%) of the title compound. 1H NMR (300 MHz, CDCl3) δ: 7.15 (d, 1H), 5.30 (d, 1H), 4.22 (t, 2H), 4.10 (t, 2H), 1.18-1.80 (m, 29H), 0.89 (t, 9H).

1. customThe phases were separated
2. washthe organic phase was washed with water (20 mL) and brine (20 mL)
3. customdried
4. concentrationconcentrated
5. customThe resulting crude material was purified by flash chromatography
6. washeluting with 0-20% EtOAc in hexanes