HCID 69079353、化合物 → HCID 69077265、化合物
反応式
[C:1]([CH2:8][C:9](=[O:19])[CH:10]([NH2:18])[CH2:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].[CH3:20][Mg]Br>C(Cl)Cl>[C:1]([CH2:8][C:9]([CH3:20])([OH:19])[CH:10]([NH2:18])[CH2:11][C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2]参加物
4
実験手順
Grignard Addition A solution of Boc-3-amino-4-phenyl-2-butanone (0.5 g, 1.9 mmol) in 100 mL methylene chloride was cooled to −78° C. and treated with methyl magnesium bromide (1.39 mL of a 3.0M solution, 4.2 mmol). The reaction was warmed to ambient temperature and stirred for 14 hours. The reaction was charged with additional methyl magnesium bromide (1.39 mL of a 3.0 M solution, 4.2 mmol) and stirred at ambient temperature for 5 hours. The reaction was quenched with ammonium chloride solution and partitioned between water and ethyl acetate. The organics were washed with water (3×), brine, dried over sodium sulfate, filtered and evaporated in vactio. Purification by flash column chromatography (20-35% ethyl acetate/hexanes) gave Boc-3-amino-2-methyl-4-phenylbutan-2-ol as a white solid: 1H NMR (400 MHz, CDCl3) δ 7.25 (m, 5H), 4.52 (m, 1H), 3.69 (m, 1H), 3.09 (dd, J=14.1, 3.3 Hz, 1H), 2.61 (t, J=12.0 Hz, 1H), 2.39 (s, 1H), 1.30 (m, 15H). Step B: Deprotection