Acetic Acid → HCID 11518665, compound

Participants

Reaction Steps

The product from Example 22B (0.2486 g, 0.50 mmol) and sodium triacetoxy borohydride (0.2235 g, 1.05 mmol) were suspended in dichloroethane (10 mL). The reaction flask was equipped with stir bar and spetum, then flushed with N2. Phenylacetaldehyde (0.10 mL, 0.85 mmol) was added followed by glacial acetic acid (0.2 mL, 3.4 mmol). After 1 hour of stirring at ambient temperature, the reaction mixture was quenched with water (20 mL) then partitioned between ethyl acetate/water. The aqueous phase was extracted with ethyl acetate (2×15 mL). The combined organic fractions were washed sequentially with aqueous saturated NaHCO3 (1×25 mL), water (1×25 mL), and brine (1×25 mL), dried (MgSO4), filtered and concentrated in vaco. The crude material was purified via column chromatography (2% to 5% methanol/dichloromethane) to afford the titled compound (0.1913 g, 79%) as a white solid. 1H NMR (300 MHz, DMSO-d6) δ ppm 8.99 (s, 1 H) 8.43 (s, 1 H) 7.80 (d, J=7.80 Hz, 1 H) 7.69 (d, J=8.48 Hz, 1 H) 7.48 (t, J=8.14 Hz, 1 H) 7.25 (m, 5 H) 7.04 (m, 1 H) 6.95 (d, J=7.46 Hz, 1 H) 6.71 (d, J=8.14 Hz, 1 H) 6.51 (t, J=6.95 Hz, 2 H) 4.03 (s, 3 H) 3.72 (m, 1 H) 3.37 (m, 3 H) 3.13 (m, 1 H) 2.82 (m, 3 H) 2.59 (m, 1 H) 1.89 (m, 1 H) 1.55 (m, 1 H). MS (ESI) m/z 484 (M+H)+, 482 (M−H)−.

Provenance & Evidence