化学合成。
化学合成
合成路线 1(1. 合成:3272-08-0)
产率:82%
合成条件:With trifluorormethanesulfonic acid; trimethylsilylazide In acetonitrile at 20℃; for 0.75 h; Sealed tube; Inert atmosphere
实验步骤:一般步骤:将芳香醛1(0.500mmol,1.0当量)和TMSN3(115mg,1.00mmol,2.0当量)在预混合的HFIP / ACN混合物(2.0mL,1:1)中在氮气冲洗中的溶液 两个dram小瓶加入三氟甲磺酸(TfOH; 17.7L,0.200mmol,0.40当量)(立即观察到由于产生气体的气体放出而放热和快速起泡)。 盖上小瓶,将反应混合物在室温下搅拌20-75分钟。 将反应混合物在氮气下浓缩。 将得到的残余物悬浮在CH 2 Cl 2 /己烷混合物中,并加载到5g样品盒中的硅胶上。 在CombiFlash纯化系统上使用正相二氧化硅快速柱进行纯化,在浓缩合适的级分时提供相应的芳族腈2。
参考文献:
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合成路线 2(2. 合成:3272-08-0)
产率:94.5%
合成条件:at 45 - 50℃; for 1.50 h;
实验步骤:将11.9g对羟基苯甲腈(0.1mol)和50mL冰醋酸加入到250mL三颈烧瓶中,滴加8mL浓硝酸和12mL冰醋酸的混合物。 滴加后,将溶液缓慢加热至45-50℃反应1.5小时,通过TLC测试,起始材料完全反应; 然后冷却,加入二氯甲烷,静置,分离上层有机层,然后用水,5%碳酸氢钠溶液和饱和盐水洗涤,每次50mL。 减压回收溶剂,得到15.5g淡黄色固体3-硝基-4-羟基苄腈(VII),产率94.5%。
参考文献:
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