化学合成,医药中间体。
医药
合成路线 1(1. 合成:24313-88-0)
产率:96.4%
合成条件:With hydrazine hydrate In ethanol for 1 h; Reflux
实验步骤:步骤B /中间体B9:3,4,5-三甲氧基苯胺向1,2,3-三甲氧基-5-硝基苯(6.64g,31.2mmol)的乙醇(250mL)溶液中加入钯碳(10%) ,300mg)和水合肼(85%,5.7mL)。 停止排出气体后,将反应混合物加热回流1小时,冷却至室温,过滤并蒸发,得到产物3,4,5-三甲氧基苯胺,为白色固体(5.5g,收率96.4%)。 1 H NMR(400MHz,DMSO-d6)δppm5.86(s,2H),4.82(br,2H),3.64(s,6H),3.50(s,3H)。
参考文献:
- [1] Patent: WO2012/92880, 2012, A1. Location in patent: Page/Page column 60 [2] Bioorganic and Medicinal Chemistry, 2009, vol. 17, # 9, p. 3414 - 3425 [3] Chemische Berichte, 1888, vol. 21, p. 615 [4] Australian Journal of Scientific Research, Series A: Physical Sciences, 1950, vol. 3, p. 467,500 [5] Journal of Pharmacy and Pharmacology, 1958, vol. 10, p. 47,59 [6] Chemische Berichte, 1959, vol. 92, p. 862,866 [7] Acta Chemica Scandinavica (1947-1973), 1963, vol. 17, p. 1151 - 1156 [8] Journal of the Chemical Society, 1963, p. 922 - 927 [9] Journal of Pharmaceutical Sciences, 1973, vol. 62, # 8, p. 1392 - 1394 [10] Australian Journal of Chemistry, 1981, vol. 34, # 4, p. 799 - 817 [11] PLoS ONE, 2015, vol. 10, # 6, [12] Journal of the American Chemical Society, 2015, vol. 137, # 21, p. 6920 - 6931
合成路线 2(3. 合成:24313-88-0)
产率:60%
合成条件:With ammonium hydroxide; ethylenediaminediacetic acid; copper(II) oxide; potassium hydroxide In water at 130℃; for 12 h; Sealed tube
实验步骤:261mg(1mmol)3,4,5-三甲氧基溴苯,0.35mL氨水(25-28%,4.655mmol),8mg(0.1mmol)CuO,70mg(0.4mmol)乙二胺-N,N'-二乙酸,112mg( 将2mmol)KOH,1mL H2O加入10mL反应管中,密封,在130°C的反应条件下保持12h。 停止反应后,用乙酸乙酯萃取,盐水洗涤,用无水硫酸钠干燥,过滤,减压蒸发滤液,通过硅胶柱色谱纯化纯化,得到3,4,5-三甲氧基苯胺110mg ,产量60%。
参考文献:
- [1] Catalysis Communications, 2014, vol. 45, p. 100 - 103 [2] Patent: CN103739417, 2016, B. Location in patent: Paragraph 0043; 0044