反应详情

23-Azido-3,6,9,12,15,18,21-heptaoxatricosan-1-ol (azido-PEG8-yne) (960 mg, 2.52 mmol, 1 equiv.), triphenylphosphine (992 mg, 3.78 mmol, 1.5 equiv.), and water (68 μL, 3.78 mmol, 1.5 equiv.) were dissolved in THF (10 mL) and stirred for 12 h. Reaction was concentrated and chromatographed (3 cm×20 cm Silica, CH2Cl2 then ramp to 80:20:1 CH2Cl2:MeOH:Et3N) and concentrated to yield 3,6,9,12,15,18,21,24-octaoxaheptacos-26-yn-1-amine (9) as a clear oil (815 mg, 91% yield). IR (thin film, NaCl) 3105 (br), 2914 (m), 1781 (m), 1638 (m), 1169 (s) cm−1. 1H-NMR (500 MHz, CDCl3) δ 4.17 (d, 2H, J=2.4), 3.66-3.57 (m, 28H), 3.54 (t, 2H, J=5.3 Hz), 2.88 (t, 2H, J=5.0 Hz), 2.41 (t, 1H, J=2.4 Hz), 2.18 (br s, 2H). 13C NMR (125 MHz, CDCl3) δ 79.52, 74.59, 72.54, 70.41, 70.38, 70.38, 70.35, 70.31, 70.20, 70.06, 68.90, 58.20, 41.44. HRMS (ES+) calc'd for C19H37NO8 (M+H) m/z 408.259194. Found 408.25712.

1. customReaction
2. concentrationwas concentrated
3. customchromatographed (3 cm×20 cm Silica, CH2Cl2
4. concentrationMeOH:Et3N) and concentrated