化学合成。
化学合成
合成路线 1(1. 合成:35065-86-2)
产率:96%
合成条件:With pyridine In dichloromethane at 0 - 20℃; for 19 h;
实验步骤:中级1;乙酸3-溴苯酯;向冷的(冰浴)3-溴苯酚(150g,867mmol)和吡啶(70.0mL,867mmol)的CH 2 Cl 2(1000ml)乙酰氯(61.7mL,867mmol)溶液中加入。在1小时内以逐滴方式加入,然后将混合物在室温下搅拌18小时。然后向所得溶液中加入水(500mL),分离有机层,用CH 2 Cl 2(4×150mL)萃取水,合并的有机层用2.5N NaHSO 4(3×150mL)洗涤,将3N NaOH(3×150mL),水(2×200mL)和盐水(2×200mL)干燥,用Na 2 SO 4干燥并蒸发,得到标题化合物,为粉红色液体(36.0g,86%)。 GC / MS数据:214(M)+(CgH7BrO2计算值215.04)。 (计算rnonoisotopic质量是(M)+ 213.96)。 1H NMR数据(DMSO-d6):7.44-7.48(ddd,1H1J,= 1.0Hz,J2 = 2.0Hz,J3 = 8.1Hz,Ar-H),7.43(t,1H,J = 2.1Hz,Ar- H),7.38(t,1H,J = 8.1Hz,Ar-H)1 7.14-7.18(ddd,1H,J,= 1.0Hz,J2 = 2.2Hz,J3 = 8.1Hz1 Ar-H),2.26(s ,3H,CH3)。
参考文献:
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合成路线 2(2. 合成:35065-86-2)
产率:98%
合成条件:at 20℃; for 0.50 h;
实验步骤:中间体9:(R)-2-(4-溴-2-甲氧基苯基)丙-1-醇; 中级9A :; 将硫酸(0.3mL,5.63mmol)加入到充分搅拌的3-溴苯酚(26.2g,152mmol)和乙酸酐(15.3mL,162mmol)的混合物中,用rt水浴冷却。 30分钟后,在旋转蒸发器上除去挥发物。 将冰加入到残余物中,然后用乙醚(3x)萃取。 将合并的有机层用盐水洗涤,干燥(MgSO 4)并真空浓缩,得到中间体9A(32.0g,149mmol,98%产率),为琥珀色油状物。 纯度为-95%。
参考文献:
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