化学合成。
医药中间体
合成路线 1(1. 合成:79670-17-0)
产率:97%
合成条件:With N-Bromosuccinimide; dibenzoyl peroxide In tetrachloromethane at 85℃; for 2 h;
实验步骤:将5-溴-2-甲基苯甲酸甲酯(1g,4.4mmol),N-溴代琥珀酰亚胺(0.80g,4.4mmol),过氧化苯甲酰(56mg,0.23mmol)的四氯化碳(20mL)混合物在85℃下搅拌。 °C 2小时。 将混合物通过硅胶垫过滤并真空浓缩,得到所需产物(1.3g,97%收率)。 ESI-MS m / z:306.0 [M + H] +。
参考文献:
- [1] Patent: WO2018/68017, 2018, A1. Location in patent: Page/Page column 144 [2] Organic and Biomolecular Chemistry, 2017, vol. 15, # 48, p. 10172 - 10183 [3] Patent: WO2014/76104, 2014, A1. Location in patent: Page/Page column 63 [4] Patent: CN107474006, 2017, A. Location in patent: Paragraph 0050; 0051; 0053; 0056-0057; 0059; 0062-0063; 0065 [5] Patent: WO2008/23161, 2008, A1. Location in patent: Page/Page column 116-117 [6] Journal of Organic Chemistry, 2008, vol. 73, # 5, p. 1732 - 1744 [7] Patent: US2009/143381, 2009, A1. Location in patent: Page/Page column 55 [8] Patent: WO2005/100351, 2005, A1. Location in patent: Page/Page column 13; 16 [9] Patent: US4282365, 1981, A [10] Patent: US4282365, 1981, A [11] Patent: US4282365, 1981, A [12] Patent: US2009/226398, 2009, A1 [13] Patent: WO2008/20306, 2008, A2. Location in patent: Page/Page column 38 [14] Patent: WO2011/80718, 2011, A1. Location in patent: Example 328 [15] E-Journal of Chemistry, 2011, vol. 8, # 3, p. 1108 - 1113 [16] Patent: EP2570125, 2013, A1. Location in patent: Paragraph 0134 [17] Patent: WO2013/37960, 2013, A1. Location in patent: Page/Page column 70 [18] Inorganic Chemistry, 2014, vol. 53, # 6, p. 2932 - 2942 [19] Patent: WO2015/163485, 2015, A1. Location in patent: Paragraph 0332 [20] Patent: US2017/15655, 2017, A1. Location in patent: Paragraph 1076-1077 [21] Patent: EP3327019, 2018, A1. Location in patent: Paragraph 0263 [22] Patent: WO2018/193410, 2018, A1. Location in patent: Page/Page column 70; 71
合成路线 2(2. 合成:79670-17-0)
产率:70%
合成条件:With 2,2'-azobis(isobutyronitrile) In tetrachloromethane for 4 h; Heating / reflux
实验步骤:在N 2气氛下,将5-溴-2-甲基 - 苯甲酸(1.0g,4.7mmol)置于200mL烧瓶中,并通过注射器加入甲醇。在10分钟内滴加2M二甲基 - 三甲基 - 硅烷的己烷溶液(3.5mL,23.0mmol)并在室温下搅拌1小时。加入冰醋酸(16mL)并搅拌45分钟。用乙酸乙酯(100mL)稀释,并用1M氢氧化钠水溶液(30mL),饱和碳酸氢钠水溶液(30mL)和盐水(30mL)洗涤。干燥有机层(Na 2 SO 4),过滤并真空浓缩,得到1.01g 5-溴-2-甲基 - 苯甲酸甲酯(99%)。在N 2气氛下,将5-溴-2-甲基 - 苯甲酸甲酯(1.04g,4.5mmol)置于50mL烧瓶中,并加入四氯化碳(15mL)。加入N-溴 - 琥珀酰胺(1.49g,8.3mmol)和2,2'-偶氮二异丁腈(40mg,0.2mmol),并用冷凝器和回流装置烧瓶4小时。冷却至室温并过滤。浓缩滤液并将粗产物预吸附在硅胶上。将残余物在SiO2柱上进行色谱处理,用二氯甲烷的己烷溶液(0至50%)洗脱,得到977mg 5-溴-2-溴甲基 - 苯甲酸甲酯(70%)。使用5-溴-2-溴甲基 - 苯甲酸甲酯(0. 984g,3.20mmol)和第I段中描述的方法,用于5-(4,4,5,5-四甲基 - []的替代方法1,3,2-二氧杂硼杂环戊烷-2-基)-2,3-二氢 - 异吲哚-1-酮,制备509mg标题化合物(75%)。
参考文献:
- [1] Patent: WO2005/73205, 2005, A1. Location in patent: Page/Page column 27-28