共查询到19条相似文献,搜索用时 46 毫秒
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以9-溴蒽,1,3,5-三溴苯,对溴碘苯和二苯胺为原料,经Ullmann反应,Suzuki偶联和硼酸化等反应合成了一种新型的蒽衍生物———9-[3,5-二(4’-N,N-二苯基)胺基]苯基蒽(5),其结构经1H NMR和元素分析表征。研究了5的紫外吸收光谱和荧光光谱。结果表明,5在256 nm,350 nm和388 nm处有较强吸收;在激发波长为320 nm激发下,5的发射波长在414 nm和497 nm。 相似文献
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以2,6-二氟苯胺为原料,经溴化、重氮化和 Sandermer反应合成液晶中间体4-溴-2,6-二氟苯基氰,研究了反应条件对反应的影响,各步骤产物结构经IR、MS、NMR分析数据得以确定。 相似文献
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Y. Hou P. D. Robinson C. Y. Meyers 《Acta Crystallographica. Section C, Structural Chemistry》1999,55(11):IUC9900144-IUC9900144
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P. D. Robinson Y. Hou C. Y. Meyers 《Acta Crystallographica. Section C, Structural Chemistry》1999,55(11):IUC9900147-IUC9900147
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Synthesis of 9-(2-fluorobenzyl)-6-methylamino-9H-purine ( 1 ) from nine different precursors is reported. Compound 1 was prepared by methylamination of 6-chloro-9-(2-fluorobenzyl)-9H-purine ( 4 ), by alkylation of 6-methylaminepurine ( 5 ) or form 9-(2-fluorobenzyl)-1-methyladeninium iodide ( 8 ) via the Dimroth rearrangement. Selective 2-step methylation of 6-aminopurine 6 was accomplished by hydride reduction of 6-formamidopurine 9 , 6-dimethylaminomethyleneaminopurine 10 or 6-phenylthiomethyl purine 11 to give 1. Compound 1 was also prepared by dethiation or reductive dechlorination of 2-methylthiopurine 16 or 8-chloropurine 19 , respectively, or by hydrolysis of 6-N-methylformamidopurine 12 , which was prepared from 6-dimethylaminopurine 13 by selective oxidation. 相似文献
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