Hydrochloric Acid → HCID 67040214, compound

Participants

Reaction Steps

A solution of the product of Example 52F (167 mg, 0.2185 mmol) in 1,4-dioxane (4 mL) was treated with a solution of lithium hydroxide monohydrate (18.3 mg, 0.437 mmol) in water (2 mL) at ambient temperature, then heated at 60° for 40 minutes. The reaction was cooled to room temperature, diluted with ethyl acetate (100 mL) and water (30 mL), adjusted the aqueous pH to 6 with 1N aqueous hydrochloric acid, and separated the layers. The organic phase was washed with water (2×25 mL) and brine (25 mL), dried over anhydrous sodium sulfate, filtered, and concentrated by rotary evaporation in vacuo. Purification of the residue by silica gel flash chromatography with 5% methanol/methylene chloride afforded the title compound as a yellow solid (84 mg, 71%). 1H NMR (300 MHz, DMSO-D6) δ ppm: 1.34 (d, J=6.99 Hz, 6 H) 3.15-3.30 (m, 1 H) 5.62 (s, 2 H) 6.65 (d, J=8.46 Hz, 2 H) 6.77-6.89 (m, 1 H) 7.15 (d, J=8.46 Hz, 2 H) 7.64 (d, J=8.09 Hz, 1 H) 7.87 (d, J=8.46 Hz, 1 H) 7.95 (dd, J=8.82, 2.57 Hz, 1 H) 8.04 (s, 1 H) 8.21 (d, J=9.19 Hz, 1 H) 8.42 (d, J=2.57 Hz, 1 H) 8.58 (s, 1 H) 8.89 (d, J=8.46 Hz, 1 H) 10.13 (s, 1 H) 10.92 (s, 1 H); MS (ESI+) m/z 542/544 (M+H)+.

Provenance & Evidence