反应详情

A solution of 3-formyl-benzoic acid (170 mg, 1.13 mmol), HOBt (184 mg, 1.36 mmol) and rac-2-hydroxy-N-{2-hydroxy-3-[4-(N-hydroxycarbamimidoyl)-2,6-dimethyl-phenoxy]-propyl}-acetamide (352 mg, 1.13 mmol) in THF (4 mL) and DMF (6 mL) was cooled to 0° C. before EDC hydrochloride (239 mg, 1.24 mmol) was added in portions. The mixture was stirred at rt for 1 h before it was diluted with THF (4 mL) and heated to 80° C. for 16 h. The mixture was concentrated and then separated by prep. HPLC (Waters XBridge Prep C18, 75×30 mm ID, 5 μm, 90% to 10% water (containing 0.5% of formic acid) in MeCN) to give the title compound as a white solid (130 mg). LC-MS*: tR=0.75 min; [M+1]+=425.90, 1H NMR (D6-DMSO): δ 2.35 (s, 6H), 3.20-3.29 (m, 1H), 3.40-3.49 (m, 1H), 3.71-3.82 (m, 2H), 3.84 (d, J=5.0 Hz, 2H), 3.92-4.00 (m, 1H), 5.30 (d, J=4.8 Hz, 1H), 5.55 (t, J=5.5 Hz, 1H), 7.70 (br t, J=4.8 Hz, 1H), 7.81 (s, 2H), 7.91 (t, J=7.8 Hz, 1H), 8.24 (d, J=7.5 Hz, 1H), 8.49 (d, J=7.8 Hz, 1H), 8.69 (s, 1H), 10.18 (s, 1H).

1. additionwas added in portions
2. temperatureheated to 80° C. for 16 h
3. concentrationThe mixture was concentrated
4. customseparated by prep