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1.
酰基偶氮化合物的固态合成   总被引:7,自引:3,他引:4  
固态合成具有高产率、高选择性、低能耗、无溶剂、环境污染小等优点[1]。偶氮化合物广泛地用作染料,分析试剂,非线性光学材料,激光盘信息存贮材料和现代彩色照相技术中的油溶性染料[2 8]。本文Fe(NO3)3·9H2O作为氧化剂,在室温无溶剂条件下,将芳基取代酰肼固态氧化为酰基偶氮化合物。产物的结构都经过了元素分析、IR和1HNMR谱表证。取1mmol取代酰肼和2mmolFe(NO3)3·9H2O于玛瑙研钵中混合均匀,室温下研磨6~8分钟后,混合物的颜色由浅色变为棕色。用10ml丙酮使混合物充分溶解,并移入小烧杯中,向烧杯中加入几滴盐酸,直到溶液的颜色…  相似文献
2.
Azo compounds are widely utilized as analytic reagents and dyes1, they can also be used in material of non-linear optics, material of optics information storing in laser disks, and dyes with oil solubility in photochromy in modern technology2. Recently, many noteworthy studies have shown that some azo compounds possess excellent optical memory and photoelectric properties3,4. For example, polymer scaffolds bearing azobenzene-potential are useful for optical information storage, azo-dye doped…  相似文献
3.
A robust one-pot solution-phase synthesis of 2-amino-1,3,4-oxadiazoles directly from acylhydrazines and isothiocyanates is described. Commercially-available polymer-supported reagents help facilitate both cyclization and purification. This convenient method benefits from its broad applicability, ease and safety of reagent handling, simple product isolation, and the ability to perform multiple reactions in parallel fashion without need for purification. The details and scope of this reaction strategy are presented herein.  相似文献
4.
The effect of the solvent on the course of the reaction between trichloromethylarenes and thioacylhydrazines or acylhydrazines has been considered. In alcohols as solvents, alkyl arenecarboxylates form as a result of alcoholysis, while 2,5-disubstituted 1,3,4-thiadiazoles (1,3,4-oxadiazoles) form as minor products. In pyridine solutions, the major or sole products are those of reductive condensation,i.e., the correspondingN-substituted hydrazones of arenecarbaldehydes. 1,3,4-Thiadiazole or 1,3,4-oxadiazole derivatives are obtained in good yield when the reaction is carried out in a pyridine-alkanol mixture.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1246–1249, May, 1996.  相似文献
5.
合成了3个丙酮酸的衍生物.结果发现,2'-(N-苄氧羰基甘氨酰脯氨酰胺基)丙酮酸乙酯不稳定,该化合物可以通过自催化水解;与其他脂肪酸不同,丙酮酸与N,N-二异丙基碳二亚胺(DIC)反应形成稳定的加合物,该加合物对醇以及二级胺不敏感;在酰肼的作用下,1-氯-N,N,2-三甲基丙烯胺不能将丙酮酸转化为丙酮酰氯,而是得到2-羟基丙烯酸异丁基酯.  相似文献
6.
为了研究二茂铁席夫碱对癌细胞毒性,以二茂铁甲醛或乙酰基二茂铁与3-取代-4-氨基-1,2,4-三唑-5-硫酮或酰肼缩合,得到6个新型的含二茂铁基的缩胺类席夫碱和4个酰腙类席夫碱.利用1H NMR,IR,MS谱和元素分析对化合物结构进行了表征.体外细胞测试结果表明,所有化合物对Hela (宫颈癌细胞)均有一定的抑制生长活性,而且杂环缩胺类席夫碱2的细胞毒活性要强于酰腙类席夫碱4.  相似文献
7.
Six diaryl acylhydrazine compounds were synthesized in normal temperature with self-made acyl-diazene compounds as raw materials and NH_2NH_2·H_2O as reducer.The products were confirmed by means of elemental analysis,IR and~1H NMR.In the results of IR,there were two N-H absorption at approximately 3200 and 3400 cm~(-1).However,the absorptions of N=N in raw materials disappeared.In the results of 1H NMR,the N-H chemical shifts couldn't be found.Meanwhile,two N-H chemical shifts were detected about from 8.46 to 11.38,respectively.The results of products' elemental analysis were consistent with the theoretical values.The yields of those six products were about from 84% to 93%.  相似文献
8.
取代酰肼化合物是制备偶氮化合物的原料,是一类非常重要的有机化合物,具有广泛的应用价值。它可以和金属形成稳定配合物,对聚烯烃等高分子材料的“铜害”有良好的防护作用,被称为金属减活剂[1];在照相技术方面,苯酰肼类化合物加入氯化银乳胶层中,可提高其光敏感性,使对比度增大  相似文献
9.
Two methods of preparation have been proposed and the synthesis has been effected of a large series of β-N-acylhydrazides of 1-R-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acids. The possibility of using various condensing agents for converting them into the corresponding 1,3,4-oxa-diazoloquinolines has been studied. Results are given of an investigation of the antitubercular activity of the synthesized compounds. * For Communication 148 see [1]. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1655–1663, November, 2008.  相似文献
10.
Maaroof Zarei 《Tetrahedron》2017,73(14):1867-1872
A simple and efficient synthetic method for the one-pot synthesis of 1,3,4-thiadiazoles utilizing Vilsmeier reagent was developed. In this method carboxylic acids and hydrazine were converted to 1,3,4-thiadiazoles in the presence of Vilsmeier reagent and Lawesson's reagent. The influence of the thionation reagent, solvent, temperature and time, in this reaction was discussed. The developed methodology for 1,3,4-thiadiazole synthesis has the advantage of simplicity, ambient reaction conditions, easy purification and good to excellent yield of products.  相似文献
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