Acetic Acid → HCID 135890157, compound

Participants

Reaction Steps

The compound (200 mg, 0.66 mmol) of example 42 and 2,5-hexanedione (76 mg, 0.66 mmol) were dissolved in ethanol (10 ml) and added with glacial acetic acid (0.1 ml), followed by refluxing for 12 h. The reaction mixture was concentrated to dryness, dissolved in CH2Cl2 (10 ml), and washed with saturated NaHCO3 (10 ml) and saturated saline (10 ml), dried and concentrated. The residue was passed through a silica gel column to give the title compound (110 mg, yield: 44%). 1H NMR (CDCl3) δ: 11.20 (1H, br), 8.42 (1H, d), 7.30 (1H, dd), 7.10 (1H, d), 5.93 (2H, s), 4.23 (2H, t), 2.63 (2H, q), 2.59 (2H, q), 2.06 (6H, s), 2.04 (2H, m), 1.24 (3H, t), 1.18 (3H, t), 1.15 (3H, t).

Provenance & Evidence