1-苯基-1氢-4-甲醇基-1,2,3-三唑作为含三唑环的有机中间体,广泛应用于医药和农药领域,其衍生物具有生物活性。
医药; 农药
合成路线 1(1. 合成:103755-58-4)
产率:95%
合成条件:With copper(ll) sulfate pentahydrate; hydrazine hydrate In water; acetonitrile at 20℃; for 0.67 h;
实验步骤:通用方法:在室温下将叠氮化物(1当量),炔烃(1.5当量)和CuSO 4·5H 2 O(0.1当量)溶于水和乙腈(12mL; 2:1,v / v)的混合物中。 在剧烈搅拌下将水合肼(1当量)滴加到上述溶液中。 反应物质变为浅黄色或浅绿色。 几分钟后(参见表3确切的反应时间),TLC显示反应完成。 通常产物沉淀为无色固体(除非另有说明)。 用过量的水稀释反应混合物并过滤。 将沉淀的产物用水洗涤并干燥。 这样得到的固体在溶解在适当的溶剂中后可以结晶或通过小硅藻土垫得到分析纯的产物。
参考文献:
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合成路线 2(2. 合成:103755-58-4)
产率:76%
合成条件:With copper(l) iodide; sodium azide; N,N`-dimethylethylenediamine In glycerol at 75℃; for 12 h;
实验步骤:一般步骤:向反应容器(3-dram闪烁玻璃小瓶),末端炔烃(1.0mmol),芳基溴(1.0mmol),0.079g(1.20mmol)叠氮化钠,0.019g(0.10mmol)CuI,0.018mg( 加入0.2mmol)配体(N,N'-二甲基乙二胺,L3)和2.0mL溶剂(1:2M氯化胆碱和甘油的混合物)并置于加热至75℃的砂浴中(除非另有说明) 磁热板。 将反应混合物搅拌指定时间(5-12小时)。 将所得混合物用EtOAc萃取并真空浓缩。 获得的残余物通过快速柱色谱法纯化
参考文献:
- [1] Tetrahedron, 2017, vol. 73, # 50, p. 7024 - 7029
合成路线 3(3. 合成:103755-58-4)
产率:89%
合成条件:Stage #1: With sodium tetrahydroborate In tetrahydrofuran; methanol for 1.25 h; Heating; Reflux Stage #2: With ammonium chloride In tetrahydrofuran; methanol; water
实验步骤:步骤1(1-苯基-1H- [1,2,3]三唑-4-基) - 甲醇的合成1-苯基-1H- [1,2,3]三唑-4-羧酸乙酯的搅拌溶液 将酯(通过类似于通用方案1的步骤1-3中所述的方法制备)(269mg,1.25mmol)的THF(6mL)溶液加热至回流。 在15分钟内向加热的反应混合物中分批加入硼氢化钠(395mg,10.4mmol),然后滴加MeOH(2.4mL)。 在回流温度下继续搅拌1小时。 然后将反应混合物用氯化铵溶液淬灭,产物用乙酸乙酯萃取。 用饱和盐水溶液洗涤有机层,用硫酸钠干燥并减压浓缩,得到245mg(89%)(1-苯基-1H- [1,2,3]三唑-4-基) - 甲醇。
参考文献:
- [1] Patent: US2010/160323, 2010, A1. Location in patent: Page/Page column 30