反应详情

Synthesized according to General Procedure A: 2,3,4,5,6-pentamethylbenzyl chloride (4{14}, 5 g, 25.4 mmol, 1 equiv.), piperazine (13.1 g, 152.5 mmol, 6 equiv.), THF (55.5 mL). Purification with flash column chromatography on silica gel (4:1 EtOAc:MeOH) afforded 5{14} (5.31 g, 85%) as a white solid. 1H-NMR (400 MHz, CDCl3): δ 3.52 (s, 2H), 2.80 (t, 4H, J=4.8 Hz), 2.45 (br s, 4H), 2.32 (s, 6H), 2.25 (s, 3H), 2.23 (s, 6H), 1.63 (br s, 1H). 13C-NMR (125 MHz, CDCl3): δ 133.9, 133.7, 132.3, 131.9, 57.2, 54.1, 46.5, 17.0, 16.8, 16.6.

1. customSynthesized
2. customPurification with flash column chromatography on silica gel (4:1 EtOAc:MeOH)
3. customafforded 5{14} (5.31 g, 85%) as a white solid