Diisopropylethylamine → Diphenyl Ether

Participants

Reaction Steps

To a mixture of 2-(2-(2-methoxyethoxy)ethoxy)acetic acid (0.6 g, 3.34 mmol), TBTU (1.2 g, 4.0 mmol) and DIPEA (1.3 ml, 4.0 mmol) in DMF (20 ml) was added 3-amino-1-(3-(cyclohexylmethoxy)phenyl)propan-1-ol (1.0 g, 3.34 mmol). The resulting mixture was stirred for 18 hr at room temperature. The reaction mixture was then diluted with ethyl acetate (100 ml), washed with water (2×100 ml), brine (100 ml), dried (Na2SO4) and concentrated under reduced pressure. Purification by flash chromatography (10 to 50% EtOAc-hexanes gradient) gave Example 77 as a colorless oil. Yield (0.7 g, 50%): 1H NMR (400 MHz, DMSO-d6) δ 7.65 (t, J=5.6 Hz, 1H), 7.17 (t, J=7.6 Hz, 1H), 6.82-6.85 (m, 2H), 6.72-6.75 (m, 1H), 5.22 (d, J=4.8 Hz, 1H), 4.48-4.52 (m, 1H), 3.82 (s, 2H), 3.72 (d, J=6.4 Hz, 2H), 3.42-3.52 (m, 2H), 3.39-3.41 (m, 2H), 3.30 (s, 3H), 3.12-3.17 (m, 2H), 2.86 (s, 2H), 2.66 (s, 2H), 1.61-1.79 (m, 8H), 1.08-1.28 (m, 3H), 0.98-1.06 (m, 2H).

Provenance & Evidence