化学合成。
医药
合成路线 1(1. 合成:82353-56-8)
产率:94%
合成条件:Stage #1: With oxalyl dichloride; dimethyl sulfoxide In dichloromethane at -60℃; for 0.50 h; Stage #2: With triethylamine In dichloromethane at -60 - 20℃; for 2 h;
实验步骤:中间体322在-60℃下向草酰氯(3.1g,24.5mmol)的无水DCM(200mL)溶液中加入DMSO(2.9mL,40.8mmol)。将混合物搅拌30分钟。 然后在-60℃下加入(R) - (1-羟基丙烷-2-基)氨基甲酸叔丁酯(3.5g,20mmol)的DCM(20mL)溶液。将所得溶液再搅拌30小时。分钟。 在-60℃下加入三乙胺(11.1mL,80mmol),并将混合物在室温下搅拌2小时。 加入水(100mL)并将混合物用DCM(3×50mL)萃取。 将合并的有机层用盐水洗涤,用Na 2 SO 4干燥,过滤,浓缩滤液,得到醛322,为浅黄色油状物(3.2g,94%),将其不经进一步纯化用于下一步骤。
参考文献:
- [1] Chemistry - An Asian Journal, 2012, vol. 7, # 7, p. 1542 - 1545 [2] Patent: US2015/374858, 2015, A1. Location in patent: Paragraph 0500 [3] Patent: US2009/5359, 2009, A1. Location in patent: Page/Page column 42 [4] Patent: US2009/36419, 2009, A1. Location in patent: Page/Page column 87 [5] Patent: WO2012/125887, 2012, A1. Location in patent: Page/Page column 173 [6] Tetrahedron, 2016, vol. 72, # 30, p. 4518 - 4522 [7] Journal of Organic Chemistry, 1987, vol. 52, # 7, p. 1252 - 1255 [8] Chemical and Pharmaceutical Bulletin, 1989, vol. 37, # 7, p. 1758 - 1763 [9] Bioorganic and Medicinal Chemistry Letters, 2006, vol. 16, # 6, p. 1486 - 1490 [10] Patent: US2008/194672, 2008, A1. Location in patent: Page/Page column 55 [11] Bioorganic and Medicinal Chemistry Letters, 2009, vol. 19, # 18, p. 5444 - 5448 [12] Organic and Biomolecular Chemistry, 2011, vol. 9, # 23, p. 8089 - 8095 [13] Angewandte Chemie - International Edition, 2012, vol. 51, # 21, p. 5239 - 5243 [14] Patent: WO2015/172058, 2015, A1. Location in patent: Paragraph 0019; 00108; 00109 [15] RSC Advances, 2016, vol. 6, # 31, p. 25713 - 25723 [16] Patent: WO2016/112088, 2016, A1. Location in patent: Paragraph 0719 [17] Patent: US2007/37974, 2007, A1. Location in patent: Page/Page column 11
合成路线 2(2. 合成:82353-56-8)
产率:85%
合成条件:Stage #1: With diisobutylaluminium hydride In toluene at -78℃; for 1 h; Stage #2: With methanol In toluene at -78℃; for 0.17 h; Stage #3: With methanol; water; citric acid In toluene at 0℃; for 1 h;
实验步骤:实施例46(1-甲基-2-氧代 - 乙基) - 氨基甲酸叔丁酯将实施例45的标题化合物(3.53g,17.4mmol)在-78℃下溶于甲苯(35mL)中并加入DIBAL- 在1小时内逐滴加入H(26.6mL,39.9mmol)。 在10分钟内将甲醇(70mL)加入到反应中。 在-78℃下,将反应物移至冰浴中,加入10%w / v柠檬酸水溶液(250mL)并将反应物搅拌1小时。 用乙酸乙酯萃取反应物,有机萃取液用水,盐水洗涤,用无水硫酸钠干燥,过滤并浓缩,得到标题化合物(2.57g,85%),为白色半固体.1 H NMR( 300MHz,CDCl3):δ(ppm)9.51(s,1H),5.21(宽s,1H),4.24(宽s,1H),1.53(s,9H),1.35(d,3H)。
参考文献:
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