69189-19-1

基本信息
4-溴-1,2-二溴甲基苯
1,2-雙(溴甲基)-4-溴苯
4-溴-1,2-雙(溴甲基)苯
4-broMo-1,2-bis(broMoMethyl)benzene
Benzene, 4-bromo-1,2-bis(bromomethyl)-
常見問題列表

583-71-1

69189-19-1
以4-溴-1,2-二甲苯為原料合成4-溴-1,2-雙(溴甲基)苯的一般步驟:向1000 mL圓底燒瓶中加入4-溴-鄰二甲苯(0.0811 mol,15.0 g)、N-溴代琥珀酰亞胺(NBS,0.0426 mol,7.580 g)、2,2'-偶氮二異丁腈(AIBN,0.00405 mol,0.6650 g)和500 mL的四氯化碳(CCl4)。將反應混合物加熱回流1小時。隨后,分四次額外加入NBS和AIBN。反應完成后,趁熱過濾反應混合物以去除沉淀,濃縮濾液。粗產(chǎn)物通過己烷結(jié)晶純化,得到白色晶體(23 g,收率93%)。產(chǎn)物結(jié)構(gòu)經(jīng)1H NMR(300 MHz,CDCl3)確認:δ 7.53(d,1H,ArH,J = 2.0 Hz),7.44(dd,1H,ArH,J = 8.1 Hz,J = 2.0 Hz),7.24(d,1H,ArH,J = 8.1 Hz),4.60(d,4H,CH2,J = 4.2 Hz)。
參考文獻:
[1] Patent: WO2008/24435, 2008, A2. Location in patent: Page/Page column 98
[2] Journal of Organic Chemistry USSR (English Translation), 1985, p. 1418 - 1421
[3] Zhurnal Organicheskoi Khimii, 1985, vol. 21, # 7, p. 1556 - 1560
[4] Patent: WO2015/103508, 2015, A1. Location in patent: Page/Page column 102
[5] Journal of Organic Chemistry, 1979, vol. 44, # 9, p. 1519 - 1533