作为医药中间体或农药中间体,用于相关药物和农药的合成。
医药; 农药
合成路线 1(1. 合成:37585-16-3)
产率:97%
合成条件:With iron; ammonium chloride In ethanol; water for 2 h; Reflux
实验步骤:一般步骤:将铁粉(5.5当量)和NH 4 Cl(0.7当量)悬浮于EtOH:H 2 O 10:1(0.05M)中,并与硝基苯基衍生物12(1当量)一起回流2小时。 完成后(通过TLC分析监测),将反应混合物在Celite上过滤并用CH 2 Cl 2冲洗。 在减压下蒸发溶剂并加入CH 2 Cl 2。 将混合物用饱和NaHCO 3溶液洗涤。 水相用CH 2 Cl 2萃取四次,合并的有机相用盐水洗涤,用硫酸镁干燥并过滤。 在减压下蒸发溶剂,得到所需产物11,将其不经进一步纯化用于下一步骤。
参考文献:
- [1] Angewandte Chemie - International Edition, 2017, vol. 56, # 35, p. 10573 - 10576 [2] Angew. Chem., 2017, vol. 129, # 35, p. 10709 - 10712,4 [3] Synlett, 2017, vol. 28, # 14, p. 1724 - 1728 [4] Patent: WO2008/104754, 2008, A1. Location in patent: Page/Page column 178-179 [5] Journal of Medicinal Chemistry, 1993, vol. 36, # 22, p. 3397 - 3408 [6] Patent: WO2007/14054, 2007, A2. Location in patent: Page/Page column 27 [7] Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 23, p. 7252 - 7255,4 [8] Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 23, p. 7252 - 7255
合成路线 2(2. 合成:37585-16-3)
产率:88%
合成条件:With borane-THF In tetrahydrofuran at 0 - 30℃; for 1.67 h; Inert atmosphere
实验步骤:通用方法:在0℃,Ar气氛下,向6-氯邻氨基苯甲酸(1.5g,8.74mmol)的THF(5mL)溶液中滴加1.08M硼烷 - 四氢呋喃络合物的THF(24.3mL,26.2mmol)溶液。 持续10分钟 在30℃搅拌1.5小时后,将溶液冷却至0℃,加入THF水溶液(THF / H 2 O = 1:1,60mL)和碳酸钾,并用乙醚萃取三次。 将合并的有机萃取液用盐水洗涤,用Na 2 SO 4干燥,并真空蒸发。 将残余物从AcOEt中结晶,得到1a(1.2g,88%),为白色针状晶体。
参考文献:
- [1] ACS Catalysis, 2013, vol. 3, # 4, p. 622 - 624 [2] Chemical Communications, 2017, vol. 53, # 1, p. 216 - 219 [3] Organic Letters, 2017, vol. 19, # 12, p. 3219 - 3222 [4] Bioorganic and Medicinal Chemistry, 2012, vol. 20, # 19, p. 5810 - 5831 [5] Patent: WO2016/112088, 2016, A1. Location in patent: Paragraph 0214 [6] Patent: WO2013/188724, 2013, A1. Location in patent: Paragraph 00128 [7] Synlett, 1997, vol. 1997, # 6, p. 704 - 706 [8] Chemistry - A European Journal, 2012, vol. 18, # 18, p. 5530 - 5535 [9] Tetrahedron, 2014, vol. 70, # 34, p. 5114 - 5121 [10] Tetrahedron, 2014, vol. 70, # 34, p. 5114 - 5121 [11] Synthesis (Germany), 2014, vol. 46, # 24, p. 3365 - 3373 [12] Angewandte Chemie, International Edition, 2014, vol. 53, # 36, p. 9603 - 9607,5 [13] Angewandte Chemie, 2014, vol. 126, # 36, p. 9757 - 9761,5 [14] Organic Letters, 2015, vol. 17, # 19, p. 4750 - 4753 [15] Organic Letters, 2018, [16] Patent: JP2015/212297, 2015, A. Location in patent: Paragraph 0150; 0151 [17] Organic and Biomolecular Chemistry, 2016, vol. 14, # 38, p. 8966 - 8970 [18] Tetrahedron Letters, 2017, vol. 58, # 45, p. 4264 - 4268
合成路线 3(3. 合成:37585-16-3)
产率:69%
合成条件:Stage #1: With lithium aluminium tetrahydride In tetrahydrofuran at 0 - 20℃; for 2.17 h; Stage #2: With water; sodium sulfate In tetrahydrofuran at 0℃;
实验步骤:(2-氨基-4-氯苯基)甲醇。 在N 2下,在0℃下,将2-氨基-4-氯苯甲酸甲酯(1.5g,8.08mmol)的THF(15mL)溶液滴加到LAH(429mg,11.3mmol)的THF(10mL)悬浮液中。 10分钟 将所得混合物在室温下搅拌2小时,然后在0℃下用饱和Na 2 SO 4(50mL)淬灭反应,用Et 2 O(2.x.70mL)萃取。 将合并的有机溶液用盐水(30mL)洗涤,用MgSO 4干燥,并在旋转真空下浓缩,得到预期产物,为白色固体(874mg,69%收率); 1H NMR(400MHz,MeOD)δppm4.50(s,2H),6.58(dd,J = 8.06,2.01Hz,1H),6.70(d,J = 2.01Hz,1H),7.01(d,J = 8.06) Hz,1H); 质谱。 157.06(MH +),Calc。 C7H8ClNO 157.03。
参考文献:
- [1] Patent: US2006/94707, 2006, A1. Location in patent: Page/Page column 62 [2] Patent: US2007/259850, 2007, A1. Location in patent: Page/Page column 96-97