共查询到20条相似文献,搜索用时 15 毫秒
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Raj Kumar Ramagiri 《合成通讯》2014,44(9):1301-1306
A simple and highly efficient one-pot, three-component synthesis of 3-(2-(4-chlorophenylimino)-3-(4-chlorophenyl)-2,3-dihydrothiazol-4-yl)-2H-chromen-2-ones has been reported by the reaction of 3-(2-bromoacetyl)-2H-chromen-2-one, primary amines, and phenyl isothiocyanates in presence of dimethylformamide as a solvent. The structures of newly synthesized compounds were confirmed by their analytical and spectral data. 相似文献
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The compound phenol,2-[4(S)-4,5-dihydro-4-phenyl-2-ozazolinyl(1,C15H13NO2) was synthesized with a simple,one step method free of water and air.It was obtained in a moderate yield from the reaction of 2-hydroxybenzonitrile with optically active amino alcohol in chloroben-zene under dry,anaerobic conditions.It belongs to the orthorhombic system,space group P212121 with a = 5.786(5),b = 10.730(5),c = 19.722(5),C15H13NO2,Mr = 239.26,V = 1224.4(12)3,Z = 4 and Dc = 1.298 mg/m3.The final R = 0.0324 for 1627 observed reflections with Ⅰ 2σ(Ⅰ) and Rw = 0.0826 for all data.The structure of compound 1 was determined by X-ray diffraction,NMR and HRMS. 相似文献
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2-氯-4-溴苯酚在常温下为白色固体,熔点47~49℃,易挥发,具有刺激性气味,沸点233~235℃,闪点大于110℃,可溶于苯、甲苯、四氯化碳等溶剂。2-氯-4-溴苯酚是不对称有机磷杀虫剂丙溴磷的重要中间体。该中间体是由2-氯苯酚与溴反应制得,反应过程中常有副产物2-氯-6-溴苯酚生成,反应产物通常是2-氯-4-溴苯酚、2-氯-6-溴苯酚及未反应原料2-氯苯酚的混合物。2-氯-4-溴苯酚的含量对丙溴磷的生产及产品质量有很大影响,国产2-氯-4-溴苯酚的含量通常在92%左右,生产的丙溴磷有效含量通常在86%以下,对降低生产成本和产品出口极为不利。为提高丙溴磷含量,首先要提高2-氯-4-溴苯酚的含量。本文在文献的基础上采用内标标准曲线法测定2-氯-4-溴苯酚,方法简便、快速,适用于2-氯-4-溴苯酚的工业生产分析。 相似文献
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Ming Wu DING* Jing ZHU Su Fang SHI Xiao Peng LIU Institute of Organic Synthesis Central China Normal University Wuhan Department of Chemistry Central China Normal University Wuhan Center of Analysis Testing Central China 《中国化学快报》2002,13(10)
Many N-heterocycles including 4H-imidazolin-4-ones exhibit biological activities1-3. Some derivatives of 5-(2-furfurylidene)-4H-imidazolin-4-one were found to show good antiinflammatory activity4. They can be synthesized by condensation of furfural with 5- unsubsituted 4H-imidazolin-4-ones or from corresponding oxazolones5,6. However, no synthesis of 2-aryloxy substituted 5-(2-furfurylidene)-4H-imidazolin-4-one was reported. Recently, aza-Wittig reaction has received increased attention … 相似文献
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在碳酸钾等无机碱的存在下,异硫氰酸酯和4-氯乙酰乙酸乙酯反应生成2-氨基-4-羰基-4,5-二氢噻吩-3-甲酸乙酯。该化合物显示了与醛基的反应活性,即Knoevenagel反应,本文对该噻吩化合物的Knoevenagel反应位点选择性进行了研究。运用Gaussian03程序对化合物进行了几何全优化和相应的电荷、轨道能量分析研究。 相似文献