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芳呋喃吡唑啉的合成和波谱研究 总被引:4,自引:1,他引:3
合成了14种新的1-苯基-5-对二甲胺基苯基-3-芳呋喃基及3-芳呋喃乙烯基吡唑啉衍生物。测定了它们的紫外、红外、核磁、质谱和荧光光谱。对合成反应过程中缩合环化方向进行了讨论。初步考察了所得吡唑啉的光导电性和电致变色性质。 相似文献
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本工作在合成了几种不同结构吡唑啉衍生物的基础上,测定了它们在相同极性,不同粘度介质中的荧光量子产率并表明:和1-位氮原子相联苯基的旋转松弛对该类化合物的发光具有决定意义,通过对化合物在极性与非极性溶剂内和在冻结与流动条件下(低温与室温下)荧光强度的比较,证明了二苯基吡唑啉化合物的发光态具有扭曲构象。 相似文献
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通过对一类吡唑啉衍生物(1-苯基-3-(N,N-二甲基氨基苯乙烯)-5-(4-N,N-二甲基氨基苯基)-2-吡唑啉)在不同溶剂中的光谱行为,研究了该衍生物和溶剂分子间的一般相互作用和特殊相互作用.发现利用吡唑啉溶液的荧光猝灭现象能对其和溶剂分子间不同相互作用问题提供有价值的信息. 相似文献
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采用α-三唑-β-烷氧基芳酮与肼关环,制备了1,3-二苯基-4-三唑基吡唑啉1a,1-苯基-3-对氯苯基-4-三唑基吡唑啉1b和3-取代苯基-4-三唑基吡唑啉(7),并研究了化合物7的成环优化条件.使用α,β-不饱和酮与肼关环合成了1,3,4,5-多取代吡唑啉衍生物1c-1h,并初步用质谱法确定了该反应产物的结构;同时,以3,5-二取代吡唑啉(6)和7作为中间体合成了1-,3-,4-或5-取代的化合物2a-2l.初步生物活性测定结果表明,所合成的化合物均有一定的杀菌、激素和除草效果. 相似文献
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以对叔丁基苯酚为原料,经逐步反应在对叔丁基杯[4]芳烃的下缘引入含卤素的基团,得到了一系列含卤素的杯[4]芳烃衍生物(记为1,2,3,4);利用核磁共振谱和气相色谱-质谱证实了目标产物的结构;并评价了产物对水中的Cr3+、Cu2+、Ag+的萃取性能.结果表明:杯[4]芳烃衍生物2、3和4分别对Cr3+、Cu2+和Ag+具有较好的萃取效果. 相似文献
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吡唑啉衍生物的电化学性质及其能带结构 总被引:1,自引:0,他引:1
有机 /聚合物电致发光是当今世界上的热门研究领域[1 ,2 ] ,因而有机 /聚合物电致发光材料的能带结构成为非常重要的研究课题[3] .目前 ,确定有机 /聚合物电致发光材料的能带结构的方法主要有电化学法[4] ,光谱法[5] ,量子化学计算法[6] ,紫外光电子能谱法[7] ,光电子发射法[8] 等 .这些方法中 ,由于电化学方法操作简单 ,对仪器设备要求不高 ,故被广泛使用 .虽然不同的测试方法测得的能带数据存在一定的系统误差 ,但由于电发光器件中考虑的是材料间的能带匹配 ,因此 ,在不同的条件下测定的能带数据相对来说是可信的 .吡唑啉化合物具有较高的… 相似文献
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《Arabian Journal of Chemistry》2022,15(7):103864
A search for anticancer agents has prompted the design and synthesis of new chalcone, pyrazoline and pyrimidine derivatives as potential epidermal growth factor receptor (EGFR) kinase inhibitors. These derivatives’ binding affinities were predicted by AutoDock, which showed that chalcone, pyrazoline and pyrimidine derivatives as EGFR-kinase inhibitors have good binding energies, ranging from ?10.91 to ?7.32 kcal/mol. These compounds were synthesized and characterized using elemental analysis (CHN analysis) and spectroscopic techniques (FTIR and NMR). Among the pyrazoline derivatives, 4Aiii has revealed a superior in vitro activity, inhibiting the EGFR kinase even at a low concentration of 0.19 μM compared to the pyrimidine derivative, 5Bii. In contrast, the cytotoxic effect of these derivatives was studied against hormonal and non-hormonal breast cancer cell lines. Most of the pyrazoline derivatives were able to express their cytotoxic effect efficiently against hormonal breast cancer but only one pyrimidine derivative managed to express its activity against hormonal breast cancer. 相似文献
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Ahmed F. A. Shalaby Mohamed M. Abdulla Abd El Galil E. Amr Azza A. Hussain 《Monatshefte für Chemie / Chemical Monthly》2007,138(10):1019-1027
Summary. A series of substituted heterocyclic systems were prepared from N1-[4-(4-fluorocinnamoyl)phenyl]-5-chloro-2-methoxybenzamide, which was prepared from the corresponding 5-chloroanisic acid
(2-methoxy-4-chlorobenzoic acid) as starting material. Treating of the cinnamoyl derivative with hydrazine hydrate in dioxane
afforded a pyrazoline, which was reacted with morpholine and paraformaldehyde to give the N-substituted pyrazoline. Acylation of pyrazoline with acetyl chloride in dioxane afforded the N-acetyl analogue. Also, the cinamoyl derivative was reacted with methylhydrazine, phenylhydrazine, or ethyl cyanoacetate to
yield the corresponding N-methyl-, N-phenylpyrazoline, pyrane, and pyridone derivatives. Condensation of the cinnamoyl derivative with cyanothioacetamide gave
the pyridinethione derivative, which was treated with ethyl chloroacetate affording the ethyl carboxylate derivative. Also,
it was reacted with malononitrile or ethyl acetoacetae to give the cyano amino analougues and ethyl carboxylate, which was
reacted with methylhydrazine to give the (indazolyl)phenyl derivative. On the other hand, reaction of cinnamoyl derivative
with acetyl acetone afforded the cyclohexenyl derivative, which was reacted with hydrazine hydrate to give the [methylindazolyl]phenyl
derivative. Condensation of the cinnamoyl derivative with guanidine hydrochloride or thiourea afforded the aminopyrimidine
derivative and thioxopyrimidine. The latter was condensed with chloroacetic acid to yield a thiazolopyrimidine, which was
condensed with 2-thiophenealdehyde to yield the arylmethylene derivative, however, it was also prepared directly from thiopyrimidine
by the action of chloroacetic acid, 2-thiophenealdehyde, and anhydrous sodium acetate. The pharmacological screening showed
that many of these compounds have good anti-arrhythmic activity and low toxicity. 相似文献
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Photochromic naphthopyran derivatives were synthesised for anion recognition applications. The crystal structure, experimental and theoretical investigation of photochromic and anion sensing properties of a simple naphthopyran derivative were investigated. The naphthopyran derivative displayed good fatigue resistance and selective sensing response towards cyanide ions. The mechanism of complex formation was suggested based on NMR studies. Theoretical calculations were performed to understand the experimental results. An excellent correlation between the theoretical and experimental data was observed. 相似文献
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以胺甲基苯并咪唑和水杨醛为原料设计合成了一个苯并咪唑衍生物荧光探针,通过荧光分光光度法和紫外分光光度法探寻其对常见阴阳离子的选择性识别性能。研究结果表明,Cu2+对合成得到的苯并咪唑衍生物具有荧光猝灭——"关"的作用,而S2O72-对该荧光猝灭体系具有荧光恢复——"开"的作用。据此,提出了具有实现对Cu2+,S2O72-的荧光"关-开"型探针. 相似文献