化学合成。
医药
合成路线 1(1. 合成:20260-53-1)
产率:96%
合成条件:With thionyl chloride In N,N-dimethyl-formamide at 0 - 78℃; for 3 h; Reflux
实验步骤:在无水条件下,在0℃下将烟酸(8.12mmol)和2滴无水DMF加入剧烈搅拌的SOCl 2(10mL)中。 将反应混合物加热至78℃回流3小时,减压蒸发过量的SOCl2后得到黄色固体。 然后加入10mL二乙醚回流1小时,然后过滤,得到白色固体烟酰氯盐酸盐1.388g(产率:96.0%)。
参考文献:
- [1] Dalton Transactions, 2005, # 3, p. 424 - 426 [2] Journal of Organic Chemistry, 2009, vol. 74, # 17, p. 6691 - 6702 [3] Green Chemistry, 2009, vol. 11, # 1, p. 83 - 90 [4] Molecules, 2014, vol. 19, # 4, p. 4791 - 4801 [5] Phosphorus, Sulfur and Silicon and the Related Elements, 2011, vol. 186, # 3, p. 552 - 557 [6] Zhurnal Obshchei Khimii, 1946, vol. 16, p. 1033,1035 [7] Chem.Abstr., 1947, p. 2737 [8] Chemische Berichte, 1926, vol. 59, p. 1479,1482 [9] Journal of Organic Chemistry, 1982, vol. 47, # 13, p. 2633 - 2637 [10] Journal of the American Chemical Society, 1985, vol. 107, # 17, p. 4904 - 4911 [11] Journal of Organic Chemistry, 1981, vol. 46, # 22, p. 4439 - 4445 [12] Phosphorus and Sulfur and the Related Elements, 1981, vol. 11, p. 33 - 46 [13] Tetrahedron Asymmetry, 2003, vol. 14, # 12, p. 1691 - 1699 [14] Patent: WO2004/76450, 2004, A1. Location in patent: Page 126 [15] Patent: US2006/20135, 2006, A1. Location in patent: Page/Page column 7; 8-9 [16] Bioorganic and Medicinal Chemistry, 2008, vol. 16, # 2, p. 890 - 901 [17] Bioorganic and Medicinal Chemistry Letters, 2010, vol. 20, # 24, p. 7250 - 7254 [18] Chemistry of Natural Compounds, 2012, vol. 48, # 2, p. 189 - 193 [19] Crystal Growth and Design, 2012, vol. 12, # 12, p. 6012 - 6022 [20] Patent: EP2548864, 2013, A1. Location in patent: Paragraph 0360 [21] Patent: WO2013/14104, 2013, A1. Location in patent: Page/Page column 48; 49 [22] Patent: WO2013/14102, 2013, A1. Location in patent: Page/Page column 75 [23] Inorganica Chimica Acta, 2013, vol. 400, p. 42 - 50 [24] Chemical Biology and Drug Design, 2016, p. 451 - 459 [25] MedChemComm, 2017, vol. 8, # 1, p. 152 - 157 [26] Green Chemistry, 2018, vol. 20, # 4, p. 886 - 893 [27] Patent: US3953596, 1976, A
合成路线 2(2. 合成:20260-53-1)
产率:90%
合成条件:With oxalyl dichloride In dichloromethane at 20℃; for 1 h;
实验步骤:在室温下向烟酸盐酸盐(0.5g,3.1mmol)的CH 2 Cl 2(200mL)溶液中加入草酰氯(0.42mL,4.8mmol)和三滴DMF。将反应混合物在室温下搅拌1小时,然后使用旋转蒸发器浓缩。将所得残余物重新溶解在甲苯(50mL)中,然后使用旋转蒸发器再次浓缩,得到烟酰氯盐酸盐(0.5g,90%)。在室温下向2'-羟基苯乙酮(0.38g,2.8mmol)的THF(50mL)溶液中加入烟酰氯盐酸盐(0.5g,2.8mmol)和三乙胺(1.2mL,8.6mmol)。将反应混合物在室温下搅拌2小时。将反应用水(50mL)淬灭,用CH 2 Cl 2(3×100mL)萃取,使用旋转蒸发器浓缩。通过柱色谱(己烷:乙酸乙酯2:1)纯化残余物,得到相应的酯(0.42g,62%)。将上述酯(0.42g,1.73mmol)的THF(50mL)溶液与f-BuOK(0.25g,2.25mmol)混合,在室温下搅拌16小时。用水(50mL)淬灭反应,并将水层用HCl(0.5N)酸化至pH = 6。将反应混合物用CH 2 Cl 2(3×100mL)萃取,使用旋转蒸发器浓缩,在己烷中研磨,得到固体。过滤收集该固体,用己烷洗涤,得到二酮(0.3g,71%)。将上述二酮(0.3g,1.25mmol)的HOAc(50mL)和HCl(浓HCl,1mL)溶液在回流下搅拌2小时。使用旋转蒸发器除去溶剂。通过柱(己烷:乙酸乙酯:MeOH 3:3:1)纯化残余物,得到2-(吡啶-3-基)-4H-色烯-4-酮,为浅黄色固体(0.202g,73%); MS(ES)m / z:224.90(M + 1),223.92(M); MP 122.8-124.O0C
参考文献:
- [1] Patent: WO2007/16525, 2007, A2. Location in patent: Page/Page column 73 [2] Applied Organometallic Chemistry, 2015, vol. 29, # 1, p. 20 - 25