化学合成。
有机化学合成中间体
合成路线 1(1. 合成:118156-93-7)
产率:92%
合成条件:Stage #1: With oxalyl dichloride; dimethyl sulfoxide In dichloromethane at -78 - 68℃; for 0.50 h; Stage #2: With triethylamine In dichloromethane at 20℃; for 16 h;
实验步骤:在-78℃下,将DMSO(0.18mL,2.6mmol)的CH 2 Cl 2(5mL)溶液滴加到草酰氯(2M在CH 2 Cl 2中,0.65mL,1.3mmol)的CH 2 Cl 2(4mL)溶液中。 将所得混合物在-68℃下搅拌15分钟。 逐滴加入3-羟基甲基 - 哌啶-1-羧酸叔丁酯(Dean A.Wacker等人,Bioorganic Medicinal Chemistry Letters 2002,12,1785-1789)(0.22g,1.0mmol)的CH 2 Cl 2(4mL)溶液。 在-78℃下搅拌15分钟后,加入Et 3 N(6mL)。 将所得溶液在环境温度下搅拌16小时。 加入水,混合物用乙醚萃取,将有机层干燥(Na 2 SO 4)并浓缩,得到产物,为黄色油状物(0.20g,收率92%)。 该粗产物无需进一步纯化即可用于下一步骤.MS(ESI)m / z 214(M + 1)。
参考文献:
- [1] Patent: WO2006/62465, 2006, A1. Location in patent: Page/Page column 40 [2] Patent: US2004/229864, 2004, A1. Location in patent: Page/Page column 11 [3] Patent: US2017/313683, 2017, A1. Location in patent: Paragraph 0560-0561 [4] Bioorganic and Medicinal Chemistry Letters, 2008, vol. 18, # 4, p. 1368 - 1373 [5] Patent: US2014/31354, 2014, A1. Location in patent: Paragraph 0421; 0422 [6] Bioorganic and Medicinal Chemistry Letters, 1997, vol. 7, # 12, p. 1525 - 1530 [7] Bioorganic and medicinal chemistry letters, 2002, vol. 12, # 13, p. 1785 - 1789 [8] Patent: US6645980, 2003, B1 [9] Patent: US2002/16337, 2002, A1 [10] Patent: US6635661, 2003, B2 [11] Patent: WO2007/12900, 2007, A1. Location in patent: Page/Page column 20-21 [12] Patent: US2003/220341, 2003, A1. Location in patent: Page/Page column 11-12 [13] Patent: WO2014/139328, 2014, A1. Location in patent: Page/Page column 352 [14] Patent: CN104119341, 2018, B. Location in patent: Paragraph 0027-0029 [15] Patent: CN104119339, 2018, B. Location in patent: Paragraph 0028-0030