Dimethylamine → HCID 86765191, compound

Participants

Reaction Steps

Sodium iodide (0.061 g, 0.408 mmol) and compound 19 (0.020 g, 0.034 mmol) were diluted with dioxane (10 mL), and dimethylamine (0.023 mL, 0.408 mmol) was added dropwise. The mixture was stirred at reflux for 52 h. The mixture was diluted to a volume of 250 mL with CHCl3, washed with H2O (2×50 mL) and saturated aq NaCl (50 mL), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash column chromatography (SiO2, ˜40 g), eluting first with a gradient of 0.5% MeOH in CHCl3, and then with 1% MeOH in CHCl3, to yield the product 23 as a solid (0.009 g, 47%): mp 176-178° C. (dec). IR (film) 2922, 1698, 1650, 1483, 1306, 1032, 786 cm−1: 1H NMR (CDCl3) δ 8.02 (s, 1H), 7.63 (s, 1H), 7.43 (s, 1H), 7.08 (s, 1H), 6.09 (s, 2H), 4.54-4.48 (t, 8.4 Hz, 2H), 4.29-4.25 (t, J=6.3 Hz, 2H), 3.95 (s, 3H), 3.78-3.74 (t, J=4.8 Hz, 2H), 2.57-2.53 (m, 14H), 2.27 (s, 2H), 2.03-2.02 (m, 2H); ESIMS m/550 (MH+); HRESIMS m/z 550.2558 (MH+), calcd for C30H36N3O7 550.2553; HPLC purity: 97.57% (C-18 reverse phase. MeOH—H2O, 85:15).

Provenance & Evidence