反应详情

Synthesized according to General Procedure A: 3,5-di-tert-butylbenzyl bromide (4{22}, 5 g, 17.7 mmol, 1 equiv.), piperazine (9.1 g, 105.9 mmol, 6 equiv.), THF (38.7 mL). Purification with flash column chromatography on silica gel (4:1 EtOAc:MeOH) afforded 5{22} (4.15 g, 82%) as a white solid. 1H-NMR (500 MHz, CDCl3): δ 7.31 (t, 1H, J=2.0 Hz), 7.15 (d, 2H, J=2.0 Hz), 3.51 (s, 2H), 2.89 (t, 4H, J=5.0 Hz), 2.42 (br s, 4H), 1.73 (br s, 1H), 1.33 (s, 18H). 13C-NMR (125 MHz, CDCl3): δ 150.3, 136.8, 123.3, 120.7, 64.1, 54.3, 46.1, 34.7, 31.5.

1. customSynthesized
2. customPurification with flash column chromatography on silica gel (4:1 EtOAc:MeOH)
3. customafforded 5{22} (4.15 g, 82%) as a white solid