化学合成。
化学合成
合成路线 1(1. 合成:2103-99-3)
产率:100%
合成条件:at 70℃; for 1 h;
实验步骤:通用方法:将硫脲(1.2mmol)和2-溴苯乙酮(1mmol)在EtOH(2mL)中的混合物在70℃下搅拌1小时。 将反应混合物冷却至室温,倒入冰冷的水中,过滤所得沉淀物并干燥,得到所需化合物:[6a(99%),为白色固体,熔点150-152℃(Lit.26 149) -150 oC); 6b(100%),为白色固体,熔点162-165℃(Lit.26 163-164℃); 6c(0.236g,93%),为白色固体,熔点179-181℃(Lit.26 180-181℃); 6d(98%),为白色固体,熔点203.6-204.2℃(Lit.28 / 22 204.0-204.5℃); 6e(94%),为亮黄色固体,熔点287-288℃(Lit.26,27 285-286℃); 6f(100%),为白色固体,熔点172-174℃(Lit.29-31 172℃)。
参考文献:
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合成路线 2(2. 合成:2103-99-3)
产率:95%
合成条件:With copper diacetate In acetonitrile at 25℃; for 28 h; Irradiation
实验步骤:一种合成4-烷基或芳基-2-氨基噻唑的可见光驱动方法。 该方法是指分别在溶剂乙腈中加入烯烃叠氮化合物,硫氰酸铵和乙酸铜,在25℃的温度下在波长为455nm的可见光下驱动,28小时后得到反应溶液。 将反应溶液在25℃的温度和1.3kPa的压力下旋转干燥,得到浓缩物; 将浓缩物进行硅胶柱色谱(200至300目硅胶,洗脱液:石油醚:乙酸乙酯= 6mL:1mL),得到4-(4-氯苯基)-2-氨基噻唑(2c),为白色固体。 (20毫克,95%)。
参考文献:
- [1] ACS Catalysis, 2017, vol. 7, # 11, p. 7941 - 7945 [2] Patent: CN107586282, 2018, A. Location in patent: Paragraph 0033; 0034; 0035; 0036; 0037; 0038
合成路线 3(3. 合成:2103-99-3)
产率:92%
合成条件:Stage #1: With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In water at 60℃; for 4 h; Stage #2: With sodium hydrogencarbonate In water at 80℃; for 1 h;
实验步骤:在25mL反应烧瓶中加入3mL水。 30μL吐温,0.50mmol 1-氯-4-乙基苯,1.50mmol NBS和0.05mmol AIBN,在60℃反应4小时,反应完成后,冷却。 然后,依次加入1.50mmol碳酸氢钠和0.50mmol硫脲,反应在80℃下进行1小时。 反应完成后,加入乙酸乙酯并用饱和盐水萃取。 浓缩的有机相,柱色谱法得到97mg白色固体。 产量为92%。
参考文献:
- [1] Patent: CN108863978, 2018, A. Location in patent: Paragraph 0040; 0041; 0042 [2] Patent: CN108822056, 2018, A. Location in patent: Paragraph 0026; 0027; 0028