反应详情

温度

70 °C

The title compound from Step B above (2.68 g, 8.72 mmoles) (crude product, prior to chromatography) was dissolved in anhydrous DMF (30 mL) and sodium imidazole (1.18 g, 13.1 mmoles) was added. The mixture was heated at 70° C. for 2 h and then evaporated to dryness. The product was directly chromatographed on silica gel using 1% (10% conc. NH4OH in methanol)-dichloromethane as the eluant to give the title compound (1.69 g, 69%): ESMS: m/z 280.1 (MH+); dH (CDCl3) 1.48 ppm (9H, s, CH3); dC (CDCl3) CH3: 28.5, 28.5, 28.5; CH2: 19.1, 25.5, 28.9, 31.8, ˜39.1, 44.3; CH: 48.1, 118.9, 129.5, 137.1; C: 80.1, carbonyl not visible.

1. customevaporated to dryness
2. customThe product was directly chromatographed on silica gel using 1% (10% conc. NH4OH in methanol)-dichloromethane as the eluant