路线1:L-丙氨酸与邻苯二甲酸酐反应(收率79.3%)
- 步骤:向搅拌的L-丙氨酸(8.9g,100.00mmol)和Na₂CO₃(10.6g,100.00mmol)的H₂O(100mL)溶液中加入邻苯二甲酸酐,反应1.5小时后,用1N HCl水溶液酸化至pH=1-2,过滤得白色固体17.37g。
- 条件:水为溶剂,碳酸钠存在下,20℃反应1.5小时。
- 收率:79.3%。
- 参考文献:[1] Angewandte Chemie - International Edition, 2013, vol. 52, # 51, p. 13588 - 13592;[2] Angew. Chem., 2013, vol. 125, # 51, p. 13833 - 13837;[3] Chemical Communications, 2017, vol. 53, # 47, p. 6351 - 6354;[4] Synthetic Communications, 1983, vol. 13, # 4, p. 311 - 318;[5] Synthetic Communications, 1983, vol. 13, # 5, p. 393 - 402。
路线2:L-丙氨酸与邻苯二甲酸酐高温反应(收率94%)
- 步骤:将L-丙氨酸(10mmol)与邻苯二甲酸酐(11mmol)在170℃减压下加热2.5小时,粗产物用甲苯重结晶。
- 条件:170℃反应2.5小时,减压。
- 收率:94%。
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路线3:连续流反应器合成(收率64%)
- 步骤:构建20mL PFR(81.5m×0.56mm ID不锈钢管),置于气相色谱炉中,背压2.07MPa。将酯3a(0.461mol)溶于1:1(v/v)2-丙醇:水(1500mL),用高压注射泵以0.847mL/min流速泵送,烘箱温度160℃,收集产物。
- 条件:175℃反应0.25小时,连续流反应器,2.07MPa背压。
- 收率:64%。
- 参考文献:[1] Bioorganic and Medicinal Chemistry, 2017, vol. 25, # 23, p. 6209 - 6217。
路线4:L-丙氨酸与N-乙氧羰基邻苯二甲酰亚胺反应(收率79.3%)
- 步骤:向搅拌的L-丙氨酸(8.9g,100.00mmol)和Na₂CO₃(10.6g,100.00mmol)的水溶液(100mL)中缓慢加入N-乙氧羰基邻苯二甲酰亚胺,反应1.5小时后,用1N HCl水溶液酸化至pH=1-2,过滤得白色固体17.37g。
- 条件:水为溶剂,碳酸钠存在下,室温反应1.5小时。
- 收率:79.3%。
- 参考文献:[1] Angewandte Chemie - International Edition, 2013, vol. 52, # 51, p. 13588 - 13592;[2] Angew. Chem., 2013, vol. 125, # 51, p. 13833 - 13837;[3] Chemical Communications, 2017, vol. 53, # 47, p. 6351 - 6354;[4] Synthetic Communications, 1983, vol. 13, # 4, p. 311 - 318;[5] Synthetic Communications, 1983, vol. 13, # 5, p. 393 - 402。