共查询到19条相似文献,搜索用时 78 毫秒
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新穴类大环配体——双环—N,N‘,N“—三—(1,4,苯基)—二—氨三乙酰胺和双 … 总被引:1,自引:1,他引:0
首次用二步合成法合成了大环螯合剂LH6,合环反应不需要高稀释技术,用这种方法合成六酰胺螯合剂达到了预期的目标,此法也可以用来进行对称和不对称大环分子的合成。 相似文献
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报道了以相转移催化法合成一类新有机试剂-三乙氨基胺类树型配体N,N′,N″-(三苄基)-三乙氨基胺(TBAA)和N,N′,N″-(三苯甲酰)-三乙氨基胺(TBOAA),产率85%以上。此类化合物具有近似三角架形结构,能产生荧光,可以与稀土离子进行选择性配位。 相似文献
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通过强碱性亲核试剂PhP2-与2-氯吡啶反应合成了配体二-(2-吡啶基)苯基膦(PhPPy2),用核磁共振氢谱对该膦配体的结构进行了表征。本合成方法使配体PhPPy2的合成产率提高到83%,且副反应少,合成的产物易分离。 相似文献
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采用三氯氧磷法合成了一种新型五取代有机胍N,N,N′,N′-四甲基-N″-苯基胍(PhTMG),利用IR、1HNMR、ESI-MS等方法对其结构进行了表征。考察了PhTMG对以二甘醇(DEG)、氯丙烯(ACH)和CO2为原料合成二甘醇双烯丙基碳酸酯(ADC)反应的催化性能,ADC的最高收率为95.3%。采用GC-MS、XRD、IR等分析手段结合实验验证对ADC合成反应机理进行了研究,推测出该反应分4步进行:第1步,CO2、DEG和Na2CO3反应生成二甘醇单碳酸钠盐;第2步,二甘醇单碳酸钠盐和ACH反应生成二甘醇单烯丙基碳酸酯(DGAC);第3步,DGAC、CO2和Na2CO3反应生成二甘醇单烯丙基碳酸酯单碳酸钠盐;第4步,二甘醇单烯丙基碳酸酯单碳酸钠盐与ACH反应生成目的产物ADC。并推测了反应体系中的主要副反应。 相似文献
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The syntheses of three new α-methyl-substituted bis(epoxyethyl) derivatives of phenyl ether, 1,4-diphenoxybenzene, and bis(4-phenoxyphenyl) ether are reported. Improved procedures for preparing 1,4-diphenoxybenzene and bis(4-phenoxyphenyl) ether by the Ullmann method are described. Infrared spectral data for the bisepoxides and their precursors are given, as are some reactions of the bisepoxides. 相似文献
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由乙二胺和对甲苯磺酰氯反应制得N,N′-双(对甲苯磺酰基)乙二胺。此步最佳工艺条件为:n(对甲苯磺酰氯)∶n(乙二胺)=2.2∶1,反应溶剂为苯,反应温度为40~45℃,反应时间为6h,收率80%。由丙烯酸甲酯和溴反应制得α,β-二溴丙酸甲酯,收率为88%。再由上述二种中间体反应合成标题化合物,此步省略了N,N′-双(对甲苯磺酰基)乙二胺的二钠盐制备,收率为73%。 相似文献
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The commercially available Jacobsen catalyst, N,N′-Bis(3,5-di-t-butylsalicylidene)-1,2-cyclohexanedi-aminomanganese(III) chloride 2 , is the most enantioselective catalyst developed to date for the asymmetric epoxidation of a broad range of unfunctionalized olefins. After describing the synthesis of the title compound a brief discussion of the epoxidation mechanism is given. Afterwards several applications for the enantioselective epoxidation of unfunctionalized olefins are described. For each application the scope and limitations are discussed 相似文献
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The use of polar modifiers to produce novel structures of butadiene polymers is well documented in the literature [Antkowiak TA, Oberster AE, Halasa AF, Tate DP. J Polym Sci 1972;10:1319; Langer AW. Polym Prep Am Sco Polym Div. 1966;7:132; Hay JN, McCabe JF, Robb JC. Polym Prep Am Chem Faraday Trans 1972;1:681; Halasa AF, Mochel VD, Frankel G. Polym Prep Am Chem Sco, Div Polym Chem 1980;21(1):13; Halasa AF, Schulz DN, Tate DP, Mochel VD. Adv Organomet Chem 1980;8:55 [1], [2], [3], [4] and [5]]. Manipulating microstructures of 1,3-butadiene to produce diblock co-polymers has been reported by one of us [Halasa AF. Rubber Chem Technol 1981;54:627 [6]]. The discovery of polar modifier di-piperdinoethane to produce pure (100%) atactic 1,2-polubutadiene [Halasa AF, Lohr DF, Hall JE. J Polym Sci Polym Chem Ed 1981;19 [7]] provided scientists with a new tool to structurally engineer various block co-polymers of butadiene and styrene and study their structural and viscoelastic properties [Cohen RE, Torradas JM. MS Thesis, MIT, May 1980, PhD Thesis, MIT January, 1982 [8]]. 相似文献
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