反应详情

(R)-aminocarnitine (20 mg, 0.12 mmol) and 2,5-dioxopyrrolidin-1-yl 4-propoxybenzoate (42 mg, 0.15 mmol) were dissolved into DMF (0.5 mL). Diisopropylethylamine (63 μL, 0.36 mmol) was added and the solution was stirred at room temperature for 18 h. Diethyl ether (20 mL) was added and a white precipitate was collected. The white solid was triturated with 1:1 acetone/ether and dried to give the title compound as a white powder (8.1 mg, 21%). 1H NMR (300 MHz, CD3OD) δ 7.89-7.78 (m, 2H), 7.01 (d, 2H, J=7.8 Hz), 4.75-4.63 (m, 1H), 4.02 (t, 2H, J=7.2 Hz), 3.75-3.51 (m, 2H), 3.21 (s, 9H), 2.82-2.71 (m, 2H), 1.85-1.75 (m, 2H), 1.05 (t, 3H, J=7.0 Hz); MS ESI 323.1 [M+H]+, calcd for [C17H26N2O4+H]+ 323.19.

1. customa white precipitate was collected
2. customThe white solid was triturated with 1:1 acetone/ether
3. customdried