Triethylamine → HCID 68325460、化合物
反応式
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]([OH:21])[CH2:9][N:10]([CH2:18][CH2:19]O)[C:11](=[O:17])[O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[C:4]([F:22])[CH:3]=1.C(N(CC)CC)C.CS(Cl)(=O)=O>C1COCC1>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[O:21][CH2:19][CH2:18][N:10]([C:11]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:17])[CH2:9]2)=[C:4]([F:22])[CH:3]=1参加物
5
実験手順
To a stirred solution of (RS)-tert-butyl 2-(4-bromo-2-fluorophenyl)-2-hydroxyethyl(2-hydroxyethyl)carbamate (15.5 g) and triethylamine (9.85 ml) in THF (120 ml) at 0-5° C. was added dropwise methanesulfonyl chloride (3.35 ml). The reaction mixture was then stirred at room temperature for 1 hour to afford a white suspension. The reaction mixture was then filtered to remove triethylamine hydrochloride, washing the filter with THF (20 ml). The filtrate was cooled to 0-5° C. and potassium 2-methyl-2-butoxide (36.2 ml, 1.7 M solution in toluene) was added. The reaction mixture was stirred at room temperature for 20 min and then poured into EtOAc and washed sequentially with 1 M aq. HCl, water and saturated brine. The organic phase was separated, dried over Na2SO4 and concentrated in vacuo. The residue was purified by flash column chromatography (silica gel; gradient: 0% to 30% EtOAc in hexanes) to afford (RS)-tert-butyl 2-(4-bromo-2-fluorophenyl)morpholine-4-carboxylate (6.46 g, 44%) as a yellow oil. MS (EI): 305 ([{81Br}M-C4H8]+), 303 ([{79Br}M-C4H8]+), 260 ([{∥Br}M-C4H8—CO2H]+), 258 ([{79Br}M-C4H8—CO2H]+).