Carbon tetrabromide → HCID 58974831, 화합물
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[CH3:1][O:2][C:3]([C:7]1[S:8][CH:9]=[CH:10][N:11]=1)([O:5][CH3:6])[CH3:4].[Li]CCCC.C(Br)(Br)(Br)[Br:18]>C1COCC1>[Br:18][C:9]1[S:8][C:7]([C:3]([O:5][CH3:6])([O:2][CH3:1])[CH3:4])=[N:11][CH:10]=1[CH3:1][O:2][C:3]([C:7]1[S:8][CH:9]=[CH:10][N:11]=1)([O:5][CH3:6])[CH3:4].[Li]CCCC.C(Br)(Br)(Br)[Br:18]>C1COCC1>[Br:18][C:9]1[S:8][C:7]([C:3]([O:5][CH3:6])([O:2][CH3:1])[CH3:4])=[N:11][CH:10]=1To a solution of 2-(1,1-dimethoxyethyl)-1,3-thiazole (40 g, 0.23 mol) in THF (600 ml) was added n-BuLi (100 ml, 0.25 mol) dropwise at −78° C. After stirring for 1 h at −78° C., a solution of CBr4 (300 g, 0.9 mol) in THF (300 ml) was added drop-wise. The reaction mixture was stirred for another 1 h at −78° C., and then was quenched by the addition of sat. aq. NH4Cl and was extracted with ethyl acetate (150 ml×3). The organic layers were washed with brine, dried over Na2SO4 and concentrated. The residue was purified by column (eluted by petroleum ether/EtOAc=10:1) to afforded 25 g of 5-bromo-2-(1,1-dimethoxyethyl)-1,3-thiazole as solid (43%). 1H-NMR (CDCl3 400 MHz) δ 7.81 (s, 1H, Ar—H), 3.23 (s, 6H, —OCH3), 1.72 (s, 3H, —CH3).
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