反应详情

Synthesized according to General Procedure C: 9 (3.23 g, 11.2 mmol, 1 equiv.), anhydrous hydrazine (1.1 mL, 33.6 mmol, 3 equiv.), ethanol (22.6 mL). Purification by silica gel column chromatography (4:1 EtOAc:MeOH) afforded 1{28} (1.92 g, 62%) as a white solid. 1H-NMR (500 MHz, CDCl3): δ 8.14 (br s, 1H), 7.20 (d, 2H, J=8.0 Hz), 7.14 (d, 2H, J=8.0 Hz), 3.84 (d, 2H, J=4.0 Hz), 3.47 (s, 2H), 3.06 (s, 2H), 2.63 (q, 2H, J=7.5 Hz), 2.53 (br s, 4H), 2.45 (br s, 4H), 1.22 (t, 3H, J=7.5 Hz). 13C-NMR (125 MHz, CDCl3): δ 170.5, 143.1, 134.9, 129.1, 127.7, 62.6, 60.5, 53.6, 52.9, 28.5, 15.5.

1. customSynthesized
2. customPurification by silica gel column chromatography (4:1 EtOAc:MeOH)
3. customafforded 1{28} (1.92 g, 62%) as a white solid