CN101585802A - 有机发光材料9-(4-芳乙炔基苯基)咔唑类化合物、合成方法及应用 - Google Patents
有机发光材料9-(4-芳乙炔基苯基)咔唑类化合物、合成方法及应用 Download PDFInfo
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Abstract
本发明提供一种9-(4-芳乙炔基苯基)咔唑类有机发光材料、制备方法及应用。本发明以9-(4-碘代苯)咔唑或其衍生物为原料,在三叔丁胺作用下,以双三苯基膦二氯化钯/碘化亚铜为催化剂,与末端芳炔在四氢呋喃中发生Sonogashira偶联反应20至50小时得到系列9-(4-芳乙炔基苯基)咔唑化合物。该类化合物可作为有机发光材料。
Description
技术领域
本发明属于光电材料技术领域。具体涉及一种9-(4-芳乙炔基苯基)咔唑类化合物、合成方法及应用。所述化合物具有发光性能,可以作为有机发光材料,用于发光器件、光电池、有机发光二极管等领域。
技术背景
有机发光二极管显示器件(Organic light-emitting diode,OLED)由于拥有色彩丰富、主动发光、体积小、厚度薄、视角宽、能耗低以及响应速度快等许多卓越优点,将成为新一代光源和平板显示器的有力竞争者。到目前为止,开发新型高度稳定的载流子传输材料和发光材料是提高有机电子、电光及光电器件效率和寿命的关键因素。自1987年美国柯达公司首次报道OLED以来(TangC W,Vanslyke S A.Applied Physics Letters,1987,51,913.),研究和开发具有荧光产率高、稳定性好的有机发光材料就成为了科学家的关注的热点之一。
咔唑结构单元具有良好的光学和电学性质,其结构中3,6,9位均可进行不同的结构修饰,咔唑及其衍生物已广泛应用于构建空穴传输材料、染(颜)料、多功能发光材料和有机太阳能电池材料等领域(Adhikari R M,Neckers D C.Journal of Physical ChemistryA.2009,113,417;Zhao Z,Xu X,Wang H,Lu P,YuG,Liu Y.Journal of Organic Chemistry.2008,73,594.)。苯撑乙炔撑结构单元因其特殊的刚性分子结构、精确的分子量、优良的电子传输能力和发光性能,不断引起各界的关注(Flatt A K,Yao Y,Maya F,Tour J M.Journal of Organic Chemistry.2004,69,1752;Cai L,Yao Y,Yang J,Price D W,Tour J M.Chemistry of Materials.2002,14,2905.)。通过将咔唑基团引入苯撑乙炔撑体系,并进行结构修饰,可结合两者的优点,改善其分子化学稳定性、热稳定性及电子学特性,使其更好的与其它材料结合,以得到理想的有机发光材料。
2007年,Adhikari等人报道了9-(4-(苯乙炔基)苯基)咔唑类化合物的合成及其发光性质,该类化合物可作为潜在的有机蓝光材料(Adhikari R M,Mondal R,Shah B K,Neckers D C.Journal of Organic Chemistry.2007,72,4727.),其结构如下所示。但是对其进行进一步的结构修饰和合成研究,未见文献和专利报道。如果在其主体结构中引入一些芳香基团和芳杂环基团,可望显著改善其热稳定性、化学稳定性及溶解性,并增大π电子共轭体系,提高电子传输能力和荧光量子效率,扩展其应用范围,可开发出具有实用价值的新型9-(4-芳乙炔基苯基)咔唑类有机发光材料。
发明内容
本发明的目的在于提出一类具有优良发光性能的、含有芳香基团或芳杂环基团的9-(4-芳乙炔基苯基)咔唑类化合物、合成方法、以及其作为有机发光材料的应用。
本发明以9-(4-(苯乙炔基)苯基)咔唑或其烷基取代衍生物为主体进行结构修饰,通过引入芳香基团或芳杂环基团,以增大其π电子共轭体系,从而提高电子传输能力,提高荧光量子效率,改变其化学特性、溶解性、发光性能及电子学特性,增加体系稳定性,改善其应用性能。
本发明中,9-(4-芳乙炔基苯基)咔唑类化合物的合成方法如下:9-(4-碘代苯基)咔唑或其衍生物在三叔丁胺作用下,以双三苯基膦二氯化钯/碘化亚铜为催化剂,与末端芳炔在四氢呋喃中发生Sonogashira偶联反应20至50小时,得到系列9-(4-芳乙炔基苯基)咔唑化合物。
具体合成路线如下:
其中R1,R2为H或碳原子数1-6的烷基取代基,Ar为苯基或取代的苯基、联苯基或取代的联苯基、二苯基乙炔基或取代的二苯基乙炔基、萘基或取代的萘基、蒽基或取代的蒽基、芴基或取代的芴基、咔唑基或取代的咔唑基、噻吩基、吡咯基、呋喃基、吡啶基、咪唑基、噻二唑基、噁二唑基之任意一种,其结构如下:
其中R3为H、碳原子数1-6的烷基、碳原子数1-6的烷氧基、卤素、氨基、硝基、二甲氨基、二苯氨基、乙酰基、硫乙酰基之任意一种。当R1,R2同时为H或叔丁基时,Ar不为苯基或4-硝基苯基。
上述化合物结构中,比较典型的有以下几种:
(1)9-(4-(取代苯乙炔基)苯基)咔唑
其中R1,R2为H或碳原子数1-6的烷基取代基,R3为碳原子数1-6的烷基、碳原子数1-6的烷氧基、卤素、氨基、硝基、二甲氨基、二苯氨基、乙酰基、硫乙酰基。
(2)9-(4-(取代4-联苯乙炔基)苯基)咔唑
其中R1,R2为H或碳原子数1-6的烷基取代基,R3为H。
(3)9-(4-(取代2-萘乙炔基)苯基)咔唑
其中R1,R2为H或碳原子数1-6的烷基取代基,R3为H。
(4)9-(4-(4-(取代苯乙炔基)苯乙炔基)苯基)咔唑
其中R1,R2为H或碳原子数1-6的烷基取代基,R3为H。
(5)9-(4-(取代2-芴乙炔基)苯基)咔唑
其中R1,R2为H或碳原子数1-6的烷基取代基,R3为H、甲基、乙基、正丁基、正己基。
(6)9-(4-(2-五元杂环乙炔基)苯基)咔唑
其中R1,R2为H或碳原子数1-6的烷基取代基,X为O,S或N。
其中,典型化合物9-(4-(4-甲基苯乙炔基)苯基)咔唑、9-(4-(4-甲氧基苯乙炔基)苯基)咔唑、9-(4-(4-硫乙酰基苯乙炔基)苯基)咔唑、9-(4-(4-氨基苯乙炔基)苯基)咔唑、9-(4-(4-硝基苯乙炔基)苯基)咔唑、9-(4-(4-溴苯乙炔基)苯基)咔唑、9-(4-(2-萘乙炔基)苯基)咔唑、9-(4-(2-噻吩乙炔基)苯基)咔唑、9-(4-(4-联苯乙炔基)苯基)咔唑、9-(4-(4-(苯乙炔基)苯乙炔基)苯基)咔唑、9-(4-(2-芴乙炔基)苯基)咔唑(1a-1k)的紫外最大吸收波长位于329-366nm之间,最大荧光发射光谱位于370-403nm之间,半峰宽约为50nm(具体光谱性质见表1),是一类理想的蓝光有机发光材料。
附图说明
图1 1a-1k二氯甲烷溶液中的紫外可见吸收光谱(c=5.0×10-5molL-1)
图2 1a-1k二氯甲烷溶液中的荧光发射光谱(c=5.0×10-7molL-1)
具体实施方式
实施例1:9-(4-(4-甲基苯乙炔基)苯基)咔唑(1a)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对甲基苯乙炔0.43g(3.68mmol),继续反应24h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-甲基苯乙炔基)苯基)咔唑0.97g,产率72.3%,熔点为205-207℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例2:9-(4-(4-甲氧基苯乙炔基)苯基)咔唑(1b)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对甲氧基苯乙炔0.49g(3.68mmo l),继续反应24h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-甲氧基苯乙炔基)苯基)咔唑0.75g,产率65.7%,熔点为143-145℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例3:9-(4-(4-硫乙酰基苯乙炔基)苯基)咔唑(1c)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对硫代乙酰基苯乙炔0.65g(3.68mmol),继续反应24h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-硫代乙酰基苯乙炔基)苯基)咔唑1.06g,产率79.0%,熔点为156-158℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例4:9-(4-(4-氨基苯乙炔基)苯基)咔唑(1d)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对氨基苯乙炔0.43g(3.68mmol),继续反应28h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-氨基苯乙炔基)苯基)咔唑0.84g,产率73.1%,熔点为174-176℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例5:9-(4-(4-硝基苯乙炔基)苯基)咔唑(1e)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对硝基苯乙炔0.54g(3.68mmol),继续反应28h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到红棕色固体9-(4-(4-硝基苯乙炔基)苯基)咔唑0.86g,产率69.5%,熔点为180-182℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例6:9-(4-(4-溴苯乙炔基)苯基)咔唑(1f)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对溴苯乙炔0.67g(3.68mmol),继续反应32h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-溴苯乙炔基)苯基)咔唑0.87g,产率64.2%,熔点为177-179℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例7:9-(4-(2-萘乙炔基)苯基)咔唑(1g)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入2-乙炔基萘0.56g(3.68mmol),继续反应30h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到黄色固体9-(4-(2-萘乙炔基)苯基)咔唑0.82g,产率65.1%,熔点为168-170℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例8:9-(4-(2-噻吩乙炔基)苯基)咔唑(1h)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入2-乙炔基噻吩0.40g(3.68mmol),继续反应30h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到黄色固体9-(4-(2-噻吩乙炔基)苯基)咔唑0.70g,产率62.2%,熔点为154-156℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例9:9-(4-(4-联苯乙炔基)苯基)咔唑(1i)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对乙炔基联苯0.66g(3.68mmol),继续反应30h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到黄色固体9-(4-(4-联苯乙炔基)苯基)咔唑0.95g,产率70.8%。熔点为223-225℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例10:9-(4-(4-(苯乙炔基)苯乙炔基)苯基)咔唑(1j)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入4-(4-苯乙炔基)苯乙炔0.74g(3.68mmol),继续反应28h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-((4-(4-苯乙炔基)苯乙炔基)苯基)咔唑0.88g,产率61.7%,熔点为215-217℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例11:9-(4-(2-芴乙炔基)苯基)咔唑(1k)的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入2-乙炔基芴0.70g(3.68mmol),继续反应46h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到黄色固体9-(4-(2-芴乙炔基)苯基)咔唑0.89g,产率64.3%,熔点为221-223℃,紫外吸收光谱见附图1,荧光发射光谱见附图2。
实施例12:9-(4-(4-氟苯乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对氟苯乙炔0.44g(3.68mmol),继续反应28h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-氟苯乙炔基)苯基)咔唑0.70g,产率60.8%。
实施例13:9-(4-(4-氯苯乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对氯苯乙炔0.50g(3.68mmol),继续反应24h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-氯苯乙炔基)苯基)咔唑0.81g,产率67.2%。
实施例14:9-(4-(4-乙酰基苯乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对乙酰基苯乙炔0.53g(3.68mmol),继续反应32h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-乙酰基苯乙炔基)苯基)咔唑0.76g,产率61.6%。
实施例15:9-(4-(2-吡啶乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入2-乙炔基吡啶0.38g(3.68mmol),继续反应28h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(2-乙炔基吡啶)苯基)咔唑0.66g,产率60.2%。
实施例16:9-(4-(4-二甲胺基苯乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对二甲胺基苯乙炔0.53g(3.68mmol),继续反应36h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-二甲胺基苯乙炔基)苯基)咔唑0.84g,产率67.8%。
实施例17:9-(4-(4-二苯胺基苯乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对二苯胺基苯乙炔0.99g(3.68mmol),继续反应46h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-二苯胺基苯乙炔基)苯基)咔唑0.85g,产率52.0%。
实施例18:9-(4-(4-正丁基苯乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对正丁基苯乙炔0.58g(3.68mmol),继续反应36h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-正丁基苯乙炔基)苯基)咔唑0.92g,产率72.0%。
实施例19:9-(4-(4-叔丁基苯乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入9-(4-碘代苯)咔唑1.18g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对叔丁基苯乙炔0.58g(3.68mmol),继续反应30h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体9-(4-(4-二甲胺基苯乙炔基)苯基)咔唑0.88g,产率68.8%。
实施例20:3,6-二叔丁基-9-(4-(4-甲基苯乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入3,6-二叔丁基-9-(4-碘代苯)咔唑1.54g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入对甲基苯乙炔0.43g(3.68mmol),继续反应24h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体3,6-二叔丁基-9-(4-(4-甲基苯乙炔基)苯基)咔唑0.99g,产率65.8%。
实施例21:3,6-二叔丁基-9-(4-(2-吡啶乙炔基)苯基)咔唑的合成
100mL四口烧瓶中加入3,6-二叔丁基-9-(4-碘代苯)咔唑1.54g(3.2mmol),双三苯基膦二氯化钯0.098g(0.14mmol),碘化亚铜0.026g(0.14mmol),三叔丁胺1.86g(4.48mmol)和30mL四氢呋喃,氮气保护下于室温搅拌0.5h,再加入2-乙炔基吡啶0.38g(3.68mmol),继续反应24h后加入50mL水淬灭反应。二氯甲烷(30mL×3)萃取,有机层经饱和NaCl溶液洗,无水MgSO4干燥,减压蒸去溶剂得到黑色固体,经柱层析分离提纯(硅胶填充,石油醚/二氯甲烷),得到浅黄色固体3,6-二叔丁基-9-(4-(2-吡啶乙炔基)苯基)咔唑0.90g,产率61.7%。
表1.1a-1k光谱性质列表
Table 1.Spectra properties of 1a-1k
虽然已经用优选实施例详述了本发明,然而其并非用于限定本发明。任何本领域的技术人员,在不脱离本发明的精神和范围的情况下,应当可以作出各种修改与变更。因此本发明的保护范围应当视为所附的权力要求书所限定的范围。
Claims (5)
3.一种如权利要求1或2所述的9-(4-芳乙炔基苯基)咔唑类化合物的合成方法,其特征在于具体步骤为:9-(4-碘代苯基)咔唑或其衍生物在三叔丁胺作用下,以双三苯基膦二氯化钯/碘化亚铜为催化剂,与末端芳炔在四氢呋喃中发生Sonogashira偶联反应,得到系列9-(4-芳乙炔基苯基)咔唑类化合物。
4.一种如权利要求3的合成方法,其特征在于反应时间在20小时和50小时之间,最佳反应时间为24-46小时。
5.一种如权利要求1或2所述的9-(4-芳乙炔基苯基)咔唑类化合物的应用,可用作有机发光材料。
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