化学合成。
化学合成
合成路线 1(1. 合成:170011-57-1)
产率:100%
合成条件:With hydrogen In methanol for 1 h;
实验步骤:将4-(4-氨基 - 苯基)-3,6-二氢-2H-吡啶-1-羧酸叔丁酯(0.35g,1.2mmol)(在前一步骤中制备)在甲醇中的溶液氢化 超过10%Pd / C,20 psi,1小时。 将溶液过滤并浓缩,得到0.35g(100%)标题化合物,为黄色固体:质谱(ESI,m / z):计算值。 C 16 H 24 N 2 O 2的质量计算值为277.2(M + H),实测值为277.1。
参考文献:
- [1] Patent: WO2006/47277, 2006, A2. Location in patent: Page/Page column 58-59 [2] Patent: US2006/281788, 2006, A1. Location in patent: Page/Page column 55 [3] Patent: US2008/51402, 2008, A1. Location in patent: Page/Page column 41 [4] Patent: US2008/114007, 2008, A1. Location in patent: Page/Page column 90 [5] Patent: US2007/60577, 2007, A1. Location in patent: Page/Page column 53 [6] Patent: WO2007/48088, 2007, A2. Location in patent: Page/Page column 76 [7] Journal of Medicinal Chemistry, 2011, vol. 54, # 22, p. 7860 - 7883 [8] Patent: WO2013/43232, 2013, A2. Location in patent: Paragraph 00647 [9] Patent: WO2015/92431, 2015, A1. Location in patent: Page/Page column 242; 243 [10] Bioorganic and Medicinal Chemistry Letters, 2008, vol. 18, # 12, p. 3632 - 3637
合成路线 2(2. 合成:170011-57-1)
产率:91%
合成条件:With 10 wt% Pd(OH)2 on carbon; hydrogen In methanol at 20℃;
实验步骤:4-(4-硝基苯基)-5,6-二氢吡啶-1(2H) - 羧酸叔丁酯(495mg,1.626mmol)和20Pd(OH)2 / C(50mg,0.071mmol)在MeOH中的混合物 将(20mL)脱气并用H 2回填三次。 将所得混合物在室温下在H 2气球下搅拌过夜。 滤除催化剂,将滤液真空浓缩,得到4-(4-氨基苯基)哌啶-1-羧酸叔丁酯(409mg,1.480mmol,91)。 发现LRMS m / z(M-55)221.2,需要221.2。
参考文献:
- [1] Patent: WO2018/68297, 2018, A1. Location in patent: Page/Page column 101 [2] Patent: WO2012/110773, 2012, A1. Location in patent: Page/Page column 82; 83; 84 [3] Patent: WO2014/27199, 2014, A1. Location in patent: Page/Page column 85-86 [4] Patent: WO2017/7700, 2017, A1. Location in patent: Page/Page column 124; 125 [5] Patent: WO2013/188856, 2013, A1. Location in patent: Paragraph 0456 [6] Patent: WO2015/92431, 2015, A1
合成路线 3(3. 合成:170011-57-1)
产率:93.9%
合成条件:With tin(ll) chloride In water; N,N-dimethyl-formamide at 20℃; for 3 h; Cooling with ice
实验步骤:在冰水浴中,将15.9g(48mm -1)中间体125C溶解在75mL N'-二甲基甲酰胺中,30分钟。分批加入54.1g(240mmol)氯化亚锡二水合物的混合物并在37℃下搅拌。 室温3小时。 TLC检测,反应结束后,将10%氢氧化钠水溶液滴加到反应溶液中至pH8-9,过滤,滤液用二氯甲烷萃取。 将滤饼用二氯甲烷/己烷洗涤,与有机相合并,用水洗涤,用盐洗涤,干燥,旋转,得到12.4g产物,为黄色油状物,93.9%
参考文献:
- [1] Patent: CN104411706, 2016, B. Location in patent: Paragraph 0544-0546 [2] Patent: WO2007/53452, 2007, A1. Location in patent: Page/Page column 189 [3] Patent: WO2005/120509, 2005, A1. Location in patent: Page/Page column 74