化学合成。
医药
合成路线 1(1. 合成:24932-48-7)
产率:75%
合成条件:With N-Bromosuccinimide In neat (no solvent) at 20℃; for 1.50 h; Milling; Green chemistry
实验步骤:一般步骤:将1-甲氧基-3,5-二甲基苯(100mg,0.73mmol),N-溴代琥珀酰亚胺(NBS,260mg,1.46mmol)和一个球(5mm直径,不锈钢)转移到研磨罐中(10mL) , 不锈钢)。进行球磨操作,通过TLC / 1H NMR监测反应进程。[1]完成后,将反应混合物转移到30mL乙酸乙酯中并在0℃冷却。在纸过滤时将产物分离为滤液,并将废琥珀酰亚胺作为沉淀物分离。将所得滤液真空浓缩,分离出250mg(产率:85%)2b,为无色粉末。为了大规模测试效率,还进行了以1.3g规模对1-甲氧基-3,5-二甲基苯进行单溴化反应1小时的反应,并以87%的收率分离产物[1]。停止研磨设备并从反应罐中收集小部分样品以研究TLC /质子NMR。接着,再次开始反应,排除该操作时间以报告反应时间。
参考文献:
- [1] Tetrahedron, 2002, vol. 58, # 46, p. 9413 - 9422 [2] Tetrahedron Letters, 2014, vol. 55, # 13, p. 2154 - 2156 [3] Tetrahedron Letters, 2015, vol. 55, # 13, p. 2154 - 2156 [4] Journal of the American Chemical Society, 1993, vol. 115, # 13, p. 5422 - 5429 [5] Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2006, vol. 45, # 1, p. 227 - 231 [6] Synlett, 2015, vol. 26, # 14, p. 1991 - 1996 [7] Tetrahedron Letters, 2004, vol. 45, # 37, p. 6851 - 6853 [8] Dyes and Pigments, 2014, vol. 109, p. 144 - 150 [9] Patent: CN105541850, 2016, A. Location in patent: Paragraph 0030; 0031; 0032; 0033 [10] Patent: WO2016/100754, 2016, A1. Location in patent: Paragraph 0289 [11] Tetrahedron, 2008, vol. 64, # 50, p. 11370 - 11378 [12] Chemical Science, 2017, vol. 8, # 12, p. 8164 - 8169 [13] Russian Chemical Bulletin, 2008, vol. 57, # 8, p. 1665 - 1670 [14] Bulletin de la Societe Chimique de France, 1965, p. 3537 - 3544 [15] Synthesis, 1972, p. 29 - 30 [16] Molecular Crystals and Liquid Crystals (1969-1991), 1988, vol. 154, p. 9 - 26 [17] Journal of the Chemical Society. Perkin Transactions 2, 1999, # 7, p. 1503 - 1512 [18] Chemische Berichte, 1884, vol. 17, p. 2374 [19] Tetrahedron, 2009, vol. 65, # 39, p. 8113 - 8119 [20] Journal of Organic Chemistry, 2012, vol. 77, # 3, p. 1308 - 1315 [21] Synthesis (Germany), 2016, vol. 48, # 15, p. 2449 - 2454 [22] Journal of Coordination Chemistry, 2017, vol. 70, # 16, p. 2916 - 2928