Potassium Carbonate → HCID 178519759, compound

Participants

Reaction Steps

The product of Example 1D (0.177 mmole) was dissolved in anhydrous dichloromethane (2 ml). Potassium carbonate (50 mg, 0.362 mmole) was added followed by trifluoromethanesulfonic anhydride (40 μl, 0.238 mmole). The mixture was allowed to stir at room temperature for 2 hours, then another portion of potassium carbonate (100 mg, 0.724 mmole) was added, followed by 4-piperidinemethanol (61 mg, 0.530 mmole). The resulting mixture was stirred at room temperature overnight. It was then quenched with water, and extracted three times with dichloromethane. The organic layers were combined, washed with brine, dried over sodium sulfate, and concentrated. The crude product was purified by column chromatography (0.3% ammonium hydroxide and 3% methanol in dichloromethane) to give 29 mg (43%) of title compound. 1H NMR (500 MHz, CDCl3) δ ppm 7.98 (d, J=1.83 Hz, 1H) 7.83 (d, J=8.54 Hz, 1H) 7.56 (dd, J=8.54, 1.83 Hz, 1H) 3.74-3.86 (m, 1H) 3.52 (d, J=6.10 Hz, 2H) 3.08-3.19 (m, 1H) 2.95 (d, J=10.68 Hz, 2H) 2.51-2.62 (m, 4H) 1.79 (d, J=10.68 Hz, 4H) 1.48-1.59 (m, 2H) 1.25-1.38 (m, 2H). MS: (M+H)+=381/383.

Provenance & Evidence