反应详情

To a mixture of EXAMPLE 43A (50 mg) and 4-bromo-3-methylphenol (22 mg) in THF (2 mL) was added tris(dibenzylideneacetone)dipalladium(0) (4.6 mg), and tri-tert-butylphosphine tetrafluoroborate (1.45 mg). The mixture was stirred at ambient temperature overnight and partitioned between ethyl acetate (150 mL) and water (50 mL). The extract was washed with brine, dried over sodium sulfate, and filtered. The filtrate was concentrated, and the concentrate was loaded on a silica gel cartridge and eluted with ethyl acetate (5%) in hexanes to provide a product which was dissolved in THF (2 mL), methanol (1 mL) and water (1 mL) and hydrolyzed with LiOH (100 mg) overnight. The mixture was acidified with 5% aqueous HCl and extracted with ethyl acetate. The extract was washed with water and brine and dried (Na2SO4), filtered and concentrated. The concentrate was purified by reverse phase HPLC as described in Example 1D. 1H NMR (300 MHz, CDCl3) δ 8.39 (d, 1H), 8.35 (d, 1H), 7.77 (d, 1H), 7.72 (dd, 1H), 7.13-7.50 (m, 6H), 6.85 (d, 1H), 6.76 (t, 2H), 4.21 (t, 2H), 3.47 (t, 2H), 2.38 (m, 2H), 2.13 (s, 3H).

1. custompartitioned between ethyl acetate (150 mL) and water (50 mL)
2. washThe extract was washed with brine
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationThe filtrate was concentrated
6. washeluted with ethyl acetate (5%) in hexanes
7. customto provide a product which
8. extractionextracted with ethyl acetate
9. washThe extract was washed with water and brine
10. dry with materialdried (Na2SO4)
11. filtrationfiltered
12. concentrationconcentrated
13. customThe concentrate was purified by reverse phase HPLC