共查询到20条相似文献,搜索用时 15 毫秒
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Russian Journal of Organic Chemistry - Recyclization of 4-oxo-1,3-benzoxazinium perchlorates under the action of hydrazinobenzoic acids gave previously unknown 1,2,4-triazolylbenzoic acids which... 相似文献
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Alaa S. Abd-El-Aziz Sofia Tesfalidet Christine R. de Denus Krystyna Lezynska 《合成通讯》2013,43(10):1415-1426
A novel route to the synthesis of some 2-aryl alkanoic acid esters has been achieved. Aromatic nucleophilic substitution of various arene cyclopenta-dienyliron complexes with ethyl ethylacetoacetate and ethyl methylacetoacetate produced the complexed alkanoic acid esters. Photolysis of these complexes resulted in the liberation of the free esters in good yields. 相似文献
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运用拼合原理将丙二酸酯类降糖活性化合物的药效基团丙二酸酯基与有降糖活性的香豆素拼合,设计合成3个新的了香豆素丙二酸甲酯类化合物,其结构经1H NMR,IR和MS表征。 相似文献
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Squaric acid (dihydroxycyclobutenedione), the dianion of which may be regarded as a novel aromatic system, has recently become readily accessible by simple syntheses. The acidic character of squaric acid manifests itself in the formation of salts and of lower alkyl esters, which can be converted into the amides. Squaric acid dichloride shows in its reactions typical acyl chloride behavior. Condensation of squaric acid with pyrrole, phenol, and azulene derivatives yields cyclotrimethine dyes. 相似文献
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TEPP和OMPA都是较早发现的具有较高杀虫活性的药剂,但由于它们对温血动物毒性高而影响广泛应用[1].许多化学家发现当焦磷酸酯中P=O上的氧原子被硫原子代替,或者烧氧基被取代氨基代替,可大大降低对温血动物的毒性而仍保持其对昆虫的毒性[2,3]. 相似文献
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Zsuzsa M. Jászay Imre Petneházy György Clementis Katalin Kováts László Töke 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract Aminocyclopropane phosphonic acids are considered to be “transition state analogues” of aminocyclopropanecarboxylic acids and they may serve as enzyme inhibitors1. We attempted to synthesise aminocyclopropane derivatives by a new route2. Phosphonoacetic acid allylic esters were subjected to an intramolecular, radical cyclisation in the presence of iodine, solid potassium carbonate and phase transfer catalyst. 相似文献
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Red Electroluminescence and Photoluminescence from Novel Binuclear Europium Complex with Squaric Acid Ligand 总被引:1,自引:0,他引:1
Wei Guo ZHU* Xiao Qiang WEI Mei Xiang ZHU Zhi Yun LU Bo LIANG Ming Gui XIE De Qiang ZHANG Yong QIU College of Chemistry Xiangtan University Xiangtan Department of Chemistry Sichuan University Chendu Department of 《中国化学快报》2001,(10)
Organic electroluminescent devices (OELDs) have attracted much attention for several years because of their potential application in large area, multi-colored flat panel displays1-5. The green organic EL display using Alq3 as emitter was commercialized in 19976. However, red-emitting OELD with excellent properties has not been well developed. In order to realize practical full-color OELDs, it is considered very important to develop red and blue emitting materials with excellent propert… 相似文献
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The reaction of pentafluorophenylmethylene-triphenylarsorane or p-chloro-tetrafluorophenylmethyl-enetriphenylarsorane, generated in situ from methylene-triphenylarsorane and hexafluorobenzene or chloropenta-fluorobenzene, with bromoacetates giving excellent yields of 3-pentafluorophenyl or 3-p-chloro-tetrafluoro-phenyl α, β-unsaturated esters with high steroselectivity is described. 相似文献
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In search of environmentally benign insecticides with high activity, low toxicity and low resistance, a series of novel anthranilic(isophthalic) acid esters was designed and synthesized based on the structure of ryanodine modulating agent. All the compounds were characterized by 1H NMR spectra, elemental analysis or high resolution mass spectrometry(HRMS). The preliminary results of biological activity assessment indicate that some of the title compounds exhibit certain but unremarkable insecticidal activity against Mythimna separata Walker at 200 mg/L and fungicidal activities against five funguses at 50 mg/L. 相似文献