反应详情

To a solution of 2,2′-(ethane-1,2-diylbis(oxy))diethanamine (1.4830 g, 10.0 mmol) in CH3CN (15 mL) was added dropwise a solution of 1,4-dioxane-2,6-dione (1.1560 g, 10.0 mmol) in CH3CN (5 mL) over 5 minutes and the mixture was stirred for 5 hours at room temperature. A colorless supernatant was discarded by decantation. 5 mL of CH3CN was added and the mixture was vortexed for 30 seconds. The supernatant was decanted. The remaining residue was dissolved in 1M HCl (20 mL) and chromatographed with Dowex 50W 8 ion-exchange resin (15 mL resin, H+-form). The mono-acid product was eluted with water and followed by 0.15M of NH4OH. The reaction afforded 37% yield of the mono-acid product as light yellow gum (JL01). 1H-NMR (400 MHz, DMSO-d6) δH 9.69 (t, J=5.20 Hz, 1H), 8.27 (br, 3H), 3.87 (s, 2H), 3.73 (s, 2H), 3.66 (t, J=5.40 Hz, 2H), 3.58 (m, 2H), 3.53 (m, 2H), 3.48 (t, J=5.00 Hz, 2H), 3.27 (m, 2H), 2.91 (t, J=5.40 Hz, 2H); 13C-NMR (101 MHz, DMSO-d6) δC 174.17, 170.48, 72.94, 72.27, 69.89, 69.81, 69.39, 66.98, 48.63, 38.54; MS (ESI) m/z 265 (M+).

1. waitthe mixture was vortexed for 30 seconds
2. customThe supernatant was decanted
3. dissolutionThe remaining residue was dissolved in 1M HCl (20 mL)
4. customchromatographed with Dowex 50W 8 ion-exchange resin (15 mL resin, H+-form)
5. washThe mono-acid product was eluted with water