100487-82-9

基本信息
2-(4-溴-2-硝苯基)乙酸甲酯
2-(4-溴-2-硝基苯基)乙酸甲酯
Methyl4-bromo-2-nitrophenylacetate98%
4-Bromo-2-nitrobenzeneacetic acid methyl ester
(4-BroMo-2-nitro-phenyl)-acetic acid Methyl ester
Benzeneacetic acid, 4-broMo-2-nitro-, Methyl ester
4-Bromo-2-nitrophenylacetic acid methyl ester, 5-Bromo-2-(2-methoxy-2-oxoethyl)nitrobenzene
物理化學(xué)性質(zhì)
制備方法

100487-81-8

100487-82-9
一般步驟:向攪拌的1,3-二甲基2-(4-溴-2-硝基苯基)丙二酸酯(20 g,60.2 mmol)的二甲基亞砜(DMSO,200 mL)溶液中加入氯化鋰(5.11 g,2當(dāng)量),隨后加入水(1.1 mL,1當(dāng)量)。將反應(yīng)混合物在100°C下攪拌2天,然后在室溫下繼續(xù)攪拌4天。反應(yīng)完成后,將混合物倒入水中,并用乙酸乙酯(2×200 mL)萃取。合并有機(jī)相,用飽和鹽水(2×200 mL)洗滌,無水硫酸鈉干燥。減壓濃縮后,殘余物通過Combi-Flash柱色譜(洗脫劑:乙酸乙酯/己烷)純化,得到2-(4-溴-2-硝基苯基)乙酸甲酯(12 g,73%收率),為淺黃色固體。1H NMR (400 MHz, DMSO-d6) δ 8.30 (d, J = 2.1 Hz, 1H), 7.98 (dd, J = 8.2, 2.1 Hz, 1H), 7.56 (d, J = 8.2 Hz, 1H), 4.08 (s, 2H), 3.63 (s, 3H)。LCMS-ESI (POS), m/z, [M + H]+: 實(shí)測(cè)值274.0和276.0。
參考文獻(xiàn):
[1] Synthesis, 1993, # 1, p. 51 - 53
[2] Journal of the American Chemical Society, 2013, vol. 135, # 2, p. 620 - 623
[3] Patent: WO2009/158011, 2009, A1. Location in patent: Page/Page column 59-60
[4] Patent: WO2009/85040, 2009, A1. Location in patent: Page/Page column 25-26
[5] Patent: US6350747, 2002, B1. Location in patent: Page column 48