化学合成;是医药行业中重要的中间体,分子中同时含有氨基、羧基、芳香苯环多个反应位点在有机合成领域应用较广。以(2-氯-苯基)-乙酸为起始物料,经与液氨发生氨解反应制备得到中间体(2-氨基-苯基)-乙酸,后与甲醇在酸性条件下发生甲酯化反应制备得到目标化合物。
医药; 有机合成
合成路线1
- 步骤: 制备2-(2-氨基苯基)乙酸甲酯(化合物6-1):将化合物1-2(9.75g,50mmol)、10%钯碳催化剂(干燥,530mg,5mmol)在甲醇(100mL)中的混合物在室温下于氢气氛下搅拌过夜;过滤反应混合物以除去钯碳催化剂,浓缩滤液,得到化合物6-1(8.02g)。
- 条件: 钯碳催化剂(10% on activated carbon);氢气(H₂);甲醇(MeOH);20℃;搅拌过夜。
- 产率: 97%。
- 表征: MS(ES):m/z:166 [M + H];¹H NMR(400MHz,DMSO-d6)δ:6.94(m,2H),6.64(d,1H,J 8.0Hz),6.51(m,1H),4.88(s,2H),3.59(s,3H),3.52(s,2H)。
- 参考文献: [1] Journal of Medicinal Chemistry, 2003, vol. 46, # 5, p. 691 - 701;[2] European Journal of Organic Chemistry, 2017, vol. 2017, # 14, p. 1889 - 1893;[3] Patent: WO2014/106238, 2014, A1. Location in patent: Paragraph 00231;[4] Patent: WO2014/106238, 2014, A1. Location in patent: Paragraph 00269; 00397;[5] Patent: WO2009/3970, 2009, A1. Location in patent: Page/Page column 42-43;[6] Journal of the American Chemical Society, 1937, vol. 59, p. 2348,2350;[7] Journal of the American Chemical Society, 1983, vol. 105, # 1, p. 74 - 79;[8] Journal of Organic Chemistry, 1995, vol. 60, # 8, p. 2326 - 2327;[9] Tetrahedron, 1997, vol. 53, # 48, p. 16521 - 16532;[10] Bioorganic and Medicinal Chemistry Letters, 2003, vol. 13, # 17, p. 2891 - 2893;[11] Bioorganic and Medicinal Chemistry, 2005, vol. 13, # 14, p. 4396 - 4401;[12] Patent: US2005/101587, 2005, A9;[13] Patent: WO2003/82841, 2003, A1. Location in patent: Page/Page column 90;[14] Journal of Organic Chemistry, 2009, vol. 74, # 23, p. 9222 - 9224;[15] Patent: WO2014/418, 2014, A1. Location in patent: Page/Page column 60;[16] RSC Advances, 2014, vol. 4, # 84, p. 44629 - 44633;[17] Patent: US2015/197511, 2015, A1. Location in patent: Paragraph 0294; 0295;[18] European Journal of Organic Chemistry, 2015, vol. 2015, # 26, p. 5775 - 5780