反应详情

To a solution of ethyl ((1S)-5-{[(dimethylamino)carbonyl]sulfanyl}-2,3-dihydro-1H-inden-1-yl)acetate (130 mg, 0.42 mmol) (Example 508) in DMF (5 mL) was added sodium ethoxide (0.63 mL, 1.69 mmol, 21% solution in EtOH), and the reaction mixture was stirred at rt. The solution turned purple, and after 2 h, the starting material had been consumed. A solution preparation of 2[4-(3-bromopropyl)-3-propylphenyl]-6,7-dihydro-5H-pyrano{2,3-d]thiazole (119 mg, 0.30 mmol) (Example 506) in DMF (1.5 mL) was added. After an additional 2 h of stirring at rt, HCl (4 mL, 1N aqueous solution) was added, followed by brine. The aqueous phase was extracted with ether, and the combined organic phases were dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified by silica gel flash chromatography (8:1 hexanes/EtOAc) to give the title compound (55 mg, 33%). 1H NMR (400 MHz, CDCl3) 7.67 (d, 1H), 7.62 (dd, 1H), 7.21 (s, 1H), 7.15 (d, 1H), 7.07 (d, 1H), 6.77 (d, 1H), 4.30 (t, 2H), 4.17 (q, 2H), 4.08 (t, 2H), 3.58-3.48 (m, 1H), 3.11 (t, 2H), 2.92-2.73 (m, 2H), 2.77 (t, 2H), 2.72 (dd, 1H), 2.60 (t, 2H), 2.44-2.32 (m, 2H), 2.16-2.03 (m, 4H), 1.79-1.68 (m, 1H), 1.67-1.57 (m, 2H), 1.28 (t, 3H), 0.94 (t, 3H); LC-MS: RT=4.85 min, (M+H)+ 552.2.

1. customthe starting material had been consumed
2. additionwas added
3. stirringAfter an additional 2 h of stirring at rt
4. extractionThe aqueous phase was extracted with ether
5. dry with materialthe combined organic phases were dried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by silica gel flash chromatography (8:1 hexanes/EtOAc)