19477-73-7

基本信息
6-溴苯酞
6-溴-3H-異苯并呋喃-1-酮
6-溴-2-苯并呋喃-1(3H)酮
6-溴苯肽 ( 粗品)(6-溴-2-苯并呋喃-1(3H)酮)
Roxadustat Impurity 12
6-bromo-1(3H)-isobenzofuanone
6-bromo-1H-isobenzofuran-1-one
6-bromo-2-benzofuran-1(3H)-one
6-BROMO-3 H-ISOBENZOFURAN-1-ONE
1(3H)-Isobenzofuranone, 6-broMo-
6-broMo-1,3-dihydro-2-benzofuran-1-one
物理化學(xué)性質(zhì)
安全數(shù)據(jù)
常見(jiàn)問(wèn)題列表

57319-65-0

19477-73-7
步驟c:6-溴異苯并呋喃-1(3H)-酮的合成 將NaNO2(2.2 g,0.040 mol)的水(22 mL)溶液逐滴加入至6-氨基異苯并呋喃-1(3H)-酮(5.0 g,0.030 mol)在HBr(70 mL,48%)的懸浮液中,保持反應(yīng)溫度在0℃。滴加完成后,繼續(xù)攪拌反應(yīng)混合物20分鐘。隨后,將反應(yīng)液轉(zhuǎn)移至預(yù)先冷卻的CuBr(22 g,0.21 mol)在HBr(48%,23 mL)的溶液中。攪拌所得深棕色混合物20分鐘后,用去離子水(200 mL)稀釋?zhuān)龀龀壬恋?。過(guò)濾收集沉淀,用飽和NaHCO3溶液洗滌,隨后用乙酸乙酯(20 mL×3)萃取。合并有機(jī)相,用無(wú)水Na2SO4干燥,減壓濃縮,得到6-溴異苯并呋喃-1(3H)-酮(5.4 g,產(chǎn)率84%)。 1H NMR(300 MHz,CDCl3)δ 8.05(d,J = 1.8 Hz,1H),7.80(dd,J = 8.1,1.8 Hz,1H),7.39(d,J = 8.1 Hz,1H),5.28(s,2H)。
參考文獻(xiàn):
[1] Patent: US2008/9524, 2008, A1. Location in patent: Page/Page column 410
[2] Patent: EP1362856, 2003, A1. Location in patent: Page/Page column 159
[3] Patent: US2015/231142, 2015, A1. Location in patent: Paragraph 1265
[4] Chemistry of Heterocyclic Compounds, 2010, vol. 46, # 2, p. 140 - 145
[5] Journal of Medicinal Chemistry, 2015, vol. 58, # 9, p. 3997 - 4015