化学合成。
化学合成
合成路线 1(1. 合成:17996-12-2)
产率:90%
合成条件:With sodium hydroxide In tetrahydrofuran; water at 0 - 20℃; for 1 h;
实验步骤:将溶解在四氢呋喃(50mL)和水(15mL)的混合物中的6-氨基己醇(5.0g,42.7mmol)在0℃下滴加氯甲酸苄基酯(7.3mL,51.2mmol)。在相同温度下加入氢氧化钠(1N,12mL)30分钟以保持反应溶液的pH为8-9,然后在环境温度下再搅拌30分钟。将反应混合物用乙醚(30mL×3)萃取,干燥并真空蒸发。在二氯甲烷和己烷的混合溶剂中重结晶后,得到所需化合物,为白色结晶固体(3.85g,90%收率)。 1H NMR(400MHz,CDCl3):δ7.34(m,5H,Ar),5.07(s,2H,PhCH2),4.73(br,NH),3.61(t,J = 6.4Hz,2H,CH2O),3.16 (dt,J = 6.8,6.8Hz,2H,NCH2),1.61-1.32(m,8H,CH2); 13C NMR(100MHz,CDCl3):156.4(C,C = O),136.6,128.5,128.1(CH,Ar),66.6(CH2,PhCH2),62.7(CH,CH2OH),40.9(CH,NHCH2), 32.5(CH2,CH2CH2OH),29.9(CH2,NHCH2CH2),26.3(CH2,CH2CH2CH2OH),25.3(CH2,NCH2CH2CH2)。
参考文献:
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合成路线 2(2. 合成:17996-12-2)
产率:83%
合成条件:With triethylamine In dichloromethane at 20℃; for 1 h; Inert atmosphere
实验步骤:将化合物1001-起始化合物1000(10g,85.38mmol)加入到反应烧瓶中,抽空并用氩气吹扫。将起始原料溶解在二氯甲烷中,通过注射器加入三乙胺(23.79%,170.7mmol)。将N-(苄氧基羰氧基)琥珀酰亚胺(31.9g,128mmol)溶解在无水二氯甲烷中,然后通过注射器加入到反应混合物中。将反应在室温下搅拌1小时。通过TLC(50%EtOAc /己烷)检查反应,并将反应混合物减压浓缩。将残余物溶于二氯甲烷中,加入分液漏斗中,用10%柠檬酸溶液洗涤有机层。分离有机层并用盐水溶液洗涤。分离有机层并用硫酸钠干燥。滤出固体,浓缩母液。通过硅胶快速色谱法(10%至100%EtOAc /己烷)纯化残余物,合并产物级分,减压浓缩,得到17.9g,(83%)1001。NMR(400MHz,DMSO-de):δ 7.40 - 7.25(m,4H),7.21(t,J = 5.7 Hz,1H),4.99(s,2H),4.31(t,J = 5.1 Hz,1H),3.36(m,2H),2.96(q ,J = 6.7Hz,2H),1.38(m,4H),1.32-1.17(m,J = 5.2,4.6Hz,4H)。
参考文献:
- [1] Patent: WO2018/136620, 2018, A2. Location in patent: Paragraph 00568 [2] Patent: US4550163, 1985, A
合成路线 3(3. 合成:17996-12-2)
产率:80%
合成条件:With diisobutylaluminium hydride In tetrahydrofuran; methanol; hexane; ethyl acetate; toluene
实验步骤:(b)步骤B,方案2(6-羟基己基) - 氨基甲酸苄酯:向冷却至-78℃的二异丁基氢化铝(49mL,1.5M,在甲苯中)的THF(150mL)溶液中加入 6-苄氧基羰基氨基 - 己酸甲酯(10g,37mmol)的THF(100mL)溶液。 将反应混合物搅拌4小时,并在-78至-75℃小心地加入甲醇(2.5mL).2小时后,将混合物倒入250mL在冰浴中冷却的1N HCl溶液中,用乙醇提取。 乙酸乙酯(300mL),用盐水(3×100mL)洗涤,用无水硫酸镁干燥,并真空浓缩。 通过快速柱色谱法(二氧化硅,50%乙酸乙酯的己烷溶液)纯化残余物,得到标题化合物(7.1g,80%); 白色固体,熔点67-68℃。
参考文献:
- [1] Patent: US6211241, 2001, B1 [2] Bioorganic and Medicinal Chemistry, 2013, vol. 21, # 4, p. 1018 - 1029