化学合成;生命科学。制法:Cbz-L-羟脯氨酸是一种氨基酸衍生物,可由L-脯氨酸通过CbzCl保护得到,缚酸剂可选用氢氧化钠和碳酸氢钠。
化学合成; 生命科学
合成路线 1(1. 合成:13504-85-3)
- 步骤: 向1或7(78.7g,600mmol)和NaHCO₃(126g,1.5mol)的H₂O(900mL)溶液中加入氯甲酸苄酯(89.6mL,630mmol)的二恶烷(90mL)溶液,反应搅拌过夜。完成后(通过TLC监测),将反应在冰浴中冷却至0℃,并用12M HCl酸化至pH2(约75mL)。然后萃取水相(3×500mL EtOAc),有机相用盐水(3×200mL)洗涤,用Na₂SO₄干燥,浓缩,得到无色粘性油状物。产量是定量的,产物在未经纯化的情况下在下一步骤中使用。
- 条件: With sodium hydrogencarbonate In 1,4-dioxane; water at 20℃
- 产率: 100%
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合成路线 2(2. 合成:13504-85-3)
- 步骤: 将氯甲酸苄基酯(12.5mL,87.7mL)的甲苯(40mL)溶液加入到反式-4的溶液中。在15分钟内,羟基-L-脯氨酸11(10g,76.3mmol)和NaHCO₃(16g,190mmol)的H₂O(165mL)溶液。在室温下搅拌12小时后,使两相分离。将水相用乙醚(4×50mL)洗涤,在冰浴中冷却,然后用浓盐酸酸化至pH 2。盐酸。用乙酸乙酯(5×50mL)萃取所得产物,干燥(MgSO₄)合并的有机萃取物,真空蒸发过量溶剂,得到无色粘性油状物(20.30g,100%)。 [α]²⁷D = -565°(c 0.1,MeOH)。 ¹H NMR(CDCl₃):δ2.07-2.31(m,3H,H1),3.52-3.59(m,2H,H3),4.43-4.53(m,2H,H2,H11a),5.8和5.11(s,2H,H6,1:2),6.0(bs,2H,OH),7.26-7.29和7.32-7.34(m,5H,H的主要和主要旋转异构体,1:2)的次要和主要旋转异构体。 IR(薄膜):ν= 3414(OH),2940(OH),1682(C=O),1495,1429,1359(CO₂-),1314,1269,1205,1108,1174,1127,1082,1051,993,914,866,826,769,741,697cm⁻¹。 MS(EI):m/e(相对强度):266(M+。,1),265(6),220(5),176(15),130(34),108(2)。 91(100),86(4),68(11)。 HRMS计算。 C₁₃H₁₁NO = 265.0950,实测值265.0976
- 条件: With sodium hydrogencarbonate In water; toluene
- 产率: 100%
- 参考文献: [1] Patent: US2003/120069, 2003, A1