Acetic Acid → 2-{5-[3-({2-[(4-Chloro-phenyl)-ethyl-amino]-ethyl}-ethyl-amino)-propylidene]-5,11-dihydro-10-oxa-1-aza-dibenzo[a,d]cyclohepten-7-yl}-propan-2-ol

Participants

Reaction Steps

To a solution of 2-(5-{3-[2-(4-chloro-phenylamino)-ethylamino]-propylidene}-5,11-dihydro-10-oxa-1-aza-dibenzo[a,d]cyclohepten-7-yl)-propan-2-ol (0.13 g, 0.27 mmol) in dichloroethane (5.0 mL) was added acetaldehyde (0.045 mL, 0.81 mmol), sodium triacetoxy borohydride (0.17 g, 0.81 mmol) and catalytic acetic acid and stirred at room temperature overnight. The reaction mixture was concentrated and the residue was dissolved in dichloromethane and washed with saturated aqueous sodium bicarbonate. The combined organics were washed with brine, dried over sodium sulfate and concentrated in vacuo. The crude product was purified on silica using gradient elution from ethyl acetate (100%) to ethyl acetate/methanol (5%). 1H-NMR (CDCL3) δ: 0.90-1.20 (6H, 2×t), 1.60 (6H, s), 2.20-2.40 (2H, m), 2.45-2.65 (6H, m), 3.20-3.40 (4H, 2×q), 5.30 (2H, br, s), 6.10 (1H, t), 6.50 (2H, dd), 6.80 (1H, d), 7.10 (2H, dd) 7.20-7.35 (2H, m), 7.45 (1H, dd),7.55 (1H, dd), 8.50 (1H, dd). ESI-MS m/z: 520 (M+1), UV retention time: 1.51 min.

Provenance & Evidence