tert-Butyl bromoacetate → HCID 69103938、化合物
反応式
[S:1]1[CH:5]=[C:4]([CH2:6][CH2:7][C:8]([N:10]2[CH:14]([CH2:15][C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[CH2:13][O:12][C:11]2=[O:22])=[O:9])[C:3]2[CH:23]=[CH:24][CH:25]=[CH:26][C:2]1=2.C([N-]C(C)C)(C)C.[Li+].Br[CH2:36][C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38]>O1CCCC1>[C:40]([O:39][C:37](=[O:38])[CH2:36][C@H:7]([CH2:6][C:4]1[C:3]2[CH:23]=[CH:24][CH:25]=[CH:26][C:2]=2[S:1][CH:5]=1)[C:8]([N:10]1[CH:14]([CH2:15][C:16]2[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH2:13][O:12][C:11]1=[O:22])=[O:9])([CH3:43])([CH3:42])[CH3:41]参加物
5
実験手順
To a solution of 3-(3-benzo[b]thiophen-3-yl-propionyl)-4-benzyl-oxazolidin-2-one (3.35 g, 9.18 mmol) in 100 mL anhydrous tetrahydrofuran at −78° C. was added lithium diisopropyl amide in tetrahydrofuran (6.1 mL, 11.01 mmol) and the reaction mixture was stirred for 30 min Following addition of t-butyl bromoacetate (1.62 mL, 11.01 mmol) at −78° C., the mixture was stirred overnight while it was allowed to warm to room temperature. The solvent was evaporated and the residue diluted with ethyl acetate. The organic layer was washed with water (3×100 mL), dried, filtered, and concentrated to give the crude product. The title product was obtained by filtration through a pad of silica, eluting with methylene chloride (49%).