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偶氮化合物可用作非线性光学材料、激光盘信息存贮材料和现代科技中的油溶性染料[1].传统偶氮化合物的制备有重氮盐偶合和取代肼氧化等许多方法[2~4],其偶氮基两端一般联有烃基或芳环,而联有羰基的偶氮类化合物用通常方法难以制备.本文首次用N-溴代丁二酰亚... 相似文献
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5-芳基-2-呋喃甲酸及其衍生物具有调节植物生长等作用[4].我们通过大量的实验,选用PTC法,利用5-芳基-2-呋喃甲酰氯与芳胺和芳氧基乙酰肼反应,合成了新化合物Ⅱ和Ⅳ:RCOClO(Ⅰ)ArNH2/PEG-400→RCONHAr(Ⅱ)ONaOH/... 相似文献
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水合茚三酮与芳甲基酮、水合肼缩合环化制得2-芳基-3,4-二氮杂芴酮(2); 2经还原得2-芳基-3,4-二氮杂芴(3).2与2-溴联苯格氏试剂反应得到中间体叔醇(4); 4在酸性条件下关环合成了2-芳基-3,4-二氮杂螺二芴,其结构经1H NMR,13C NMR和元素分析表征. 相似文献
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N,N′-二芳基己二酰二肼类化合物的合成及其结构表征 总被引:5,自引:1,他引:5
报道了N,N′-二芳基己二酰二肼类化合物的合成方法。以自制的己二酰二氯、取代苯肼为原料,以二氯甲烷为溶剂,用冰浴法合成了9种新型的N,N′-二芳基己二酰二肼类化合物。产品的结构经元素分析、IR、1HNMR等测试技术得到确证,产物的IR谱中,在3 200~3 400 cm-1出现2个N—H吸收峰,1H NMR谱中,在δ7.3~10.5之间有2个N—H吸收峰,产品的元素分析结果与理论值基本相符。收率81%~93%。 相似文献
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Azo compounds are widely utilized as dyes and analytical reagents.They can also be used as materials for non-linear optics and for storage optical information in laser dish[1]. Recently, many noteworthy studies have shown that azobenzene derivatives possess excellent optical memory and photoelectric properties[2]. The preparation of ordinary azo compounds has been described in many references. However, those compounds generally bear alkyl or aryl groups on both sides of the azo linkage (-N=N-). 相似文献
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Batool Akhlaghinia Mozafar Asadi Elham Safaee Mozhgan Heydarpoor 《Phosphorus, sulfur, and silicon and the related elements》2013,188(10):2099-2104
Alcohols and phenols are protected with hexamethyldisilazane in the presence of N,N′,N′,N?-tetramethyletra-2,3-pyridinoporphyrazinato copper (II) in good-to-excellent yields at room temperature. 相似文献
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Masaichi Saito Ryuta Haga Michikazu Yoshioka 《Phosphorus, sulfur, and silicon and the related elements》2013,188(4-5):703-705
Reduction of 1-t-butyl-1,2,3,4,5-pentaphenylstannole by lithium gave the stannole dianion. Reduction of the bi(1,1-stannole) having a t-butyl group on the tin by lithium also gave the stannole dianion, the formation of which was evidenced by spectral analysis and chemical trapping reaction. 相似文献
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《合成通讯》2013,43(11):1691-1695
Using potassium chlorate, sulfuric acid and ferrous sulfate as a catalytic oxidation system to oxidize the aryl substituted carbazide to prepare new type bisazo compounds in one phase have been described for the first time in this paper. Eight bisaryl carbodiazones have been synthesized in high yields under mild conditions. A possible mechanism has been suggested. 相似文献
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A SIMPLE AND IMPROVED METHOD OF ISOLATION AND PURIFICATION FOR NATIVE OAT PHYTOCHROME 总被引:2,自引:0,他引:2
Abstract— A simple procedure for the isolation and purification of 124 kDa phytochrome (phyA) from etiolated Avena seedlings has been developed employing ammonium sulfate back-extraction. After solubilization of the ammonium sulfate precipitate (250 g/L) an additional ammonium sulfate fractionation with 17 g per 100 mL rather than column chromatography was performed. After several steps of the "washing-out" procedure with 100 mM phosphate buffer, phytochrome was solubilized in 10 m M phosphate buffer. The resulting phytochrome had a specific absorbance ratio (SAR = A666 /A28 o) ranging from 0.60 to 0.85. These values are equivalent to those of phytochrome preparations after hydroxyla-patite chromatography-ammonium sulfate back-extraction. The total isolation-purification time was 8 h and yield of the chromoprotein was 50% higher than the yield using conventional techniques. The phytochrome preparation, after application to a Toyopearl HW-65S gel filtration column, produced very pure 124 kDa phyA with a specific absorbance ratio greater than 1.00. The spectral characteristics are identical to those described for the best of the highly purified native chromoprotein preparations. 相似文献
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一硫代焦磷酸四乙酯具有广泛的用途,曾被用为杀虫剂、青光眼药、电离辐射损伤的防治剂,以及防治病毒性感染和小儿麻痺症等.曾观察了它对羊心电图指数变化的影响,并报道了它对羊的消化功能有促进作用. 相似文献
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Bao-qing Shentu Ji-peng Li Zhi-xue Weng 《高分子科学》2006,(4):345-351
The effect of N,N,N',N'-tetraalkyl terephthalamide (TATA) on the non-isothermal crystallization and melting characteristics ofpolypropylene (PP) was studied. The addition of TATA can lead to the formation ofβ-crystal PP. With the increase in TATA concentration the degree of crystallinity for β-crystal PP increased significantly, and that for a-crystal PP decreased, which indicated that TATA effectively induced the formation of β-crystal PP. WAXD also revealed the existence of β-crystal PP after the introduction of TATA into PP. PP containing TATA crystallized at a temperature range of 5-10℃ higher than that of pure PP, and the half-crystallization time (t1/2) and Avrami exponent (n) of PP at the same cooling rate were decreased by the addition of TATA, indicating that TATA influenced the crystallization rate and crystallization growth mode of PP. The rate constant of crystallization of PP containing TATA (Zc) was larger than that of pure PP, which further indicated that the crystallization of PP was accelerated by the addition of TATA. 相似文献
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《合成通讯》2013,43(21):3383-3393
Oxidation of alcohols to carbonyl compounds has been carried out by utilization of Jones reagent supported on silica gel (SJR). The SJR procedure has advantages over traditional Jones oxidation procedure. This procedure is safer to carry out and simplified workup by allowing organic media. 相似文献