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羟胺和苯肼作为亲核试剂与3-(3,4,5-三甲氧基)肉桂酰基Zhou酚酮和3-(3,4-亚甲二氧基)肉桂酰基Zhou酚酮发生缩合反应分别得到3-(3,4,5-三甲氧基)苯乙烯基异恶唑并[5,4b]Zhou酮、3-(3,4-亚甲二氧基)苯乙烯基异恶唑并[5,4b]Zhou酮、3-(3,4,5-三甲氧基)苯乙烯基吡唑并[5,4b]Zhou酮和3-(3,4-亚甲二氧基)苯乙烯基吡唑并[5,4-b]Zho 相似文献
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3-乙酸基酚酮与芳醛缩合反应的研究 总被引:1,自引:0,他引:1
本文探讨了3-乙酰基酚酮与TMB等芳香醛的羟醛缩合反应。3-乙酰基酚酮与TMB、、丁香醛、胡椒醛等取代醛反应分别生成3-(3,4,5-三甲氧基)肉桂酰基酚酮、3-(4-羟基-3,5-二甲氧基)肉桂酰基酚酮、3-(3,4-亚甲二氧基)肉桂酰基酚酮。与桂皮醛反应生成3-(5-苯基-2,4-戊二烯酰基)酚酮等4种尚未见文献报道的新化合物。其结构经红外光谱、核磁共振谱及元素分析得以证实。 相似文献
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3—乙酰基Zuo酚酮与芳醛缩合反应的研究 总被引:1,自引:2,他引:1
本文探讨了3-乙酰基Zuo酚酮与TMB等芳香醛的羟醛缩合反应。3-乙酰基Zuo酚酮与TMB、丁香醛戎椒醛等取代醛反应分别生成3-(3,4,5-三甲氧基)肉桂酰基Zuo酚酮、3-(4-羟基-3,5-二甲氧基)肉桂酰基Zuo酚酮、3-(3,4-亚甲二氧基)肉桂酰基Zuo酚酮。与桂皮醛反应生成3-(5-苯基-2,4-戊二烯酰基)Zuo酚酮等4种尚未见文献报道的新化合物。其结构经红外光谱、核磁巫振谱及元素 相似文献
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本文探讨了Zuo酚酮领域内的羟醛缩合反应,3-乙酰基Zuo酚酮与TMB、丁香醛、胡椒醛等取代醛反应分别生成3-(3,4,5-三甲氧基)肉桔酰基Zuo酚酮、3-(4-羟基-3,5-二甲氧基)肉桂酰基Zuo酚酮和3-(3,4-亚甲-3,4-二氧基)肉桂基Zuo酚酮。与桂皮醛反应生成3-(5-苯基-2,4-戊二烯酰基)Zuo酚酮等四种尚未见文献报道的新化合物。其结构经红外光谱、核磁共振谱及元素分析得以证 相似文献
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本文探讨了2-乙酰基-7-甲胺基卓酮与3,4,5-三甲氧基苯甲醛(TMB)等取代芳香醛的羟醛缩合反应。2-乙酰基-7-甲胺基卓酮与TMB、丁香醛、二溴醛等取代芳香醛进行反应分别生成了2-(3,4,5-三甲氧基)肉桂酰基-7-甲胺基卓酮;2-(4-羟基-3,5-二甲氧基)肉桂酰基-7-甲胺基卓酮;2-(4-羟基-3,5-二溴)肉桂酰基-7-甲胺基卓酮等三种尚未见文献报道的新化合物。它们的结构经红外光谱、核磁共振谱及元素分析得以证实。 相似文献
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研究了3-肉桂酰基Zuo酚酮的5位单溴代产物的合成。设计路线为:以2-肉桂酰基-7-甲氨基基Zuo酮(1)为起始原料,首先进行溴化得一4-溴-2-肉桂酰基-7-甲氨基Zuo酮(2);化合物2在氢氧化钠碱性溶液中水解得到目标物5-溴-3-肉桂酰基Zuo酚酮(3),化合物2,3为尚未见文献报道的新化合物,它们的结构经物理性质的测定,光谱数据和元素分析得到证实。 相似文献
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新席夫碱萃取剂HPMαFP)2的合成及其在反相纸色谱中应用的研究 总被引:18,自引:0,他引:18
合成了新席夫碱萃取剂N,N'-A-双[(1-苯基-3-甲基-5氧-4-吡唑啉基)α-呋喃次基]乙二亚胺。通过元素分析、红外光谱、核磁共振谱、质谱和紫外光谱研究,了其结构及有关性质。 相似文献
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3,5-二羟基苯乙酮是合成肾上腺素类药物的重要中间体[1]。它的制备方法有:将3,5-二甲氧基苯甲酸甲酯与乙酸乙酯缩合、水解脱羧、脱甲基的制备方法[2];3,5-二甲氧基苯甲酰胺与甲基碘化镁反应,然后脱甲基的方法[3]等。这些方法在工业化时都存在原料成本高、反应时间长、操作繁杂、收率低、产品后处理困难等缺点。除这些方法外,迄今还未见文献报道其他方法。本文参阅文献[4,5]以酯与二甲砜缩合后还原制备甲基酮的方法,提出了一条用3,5-二甲氧基苯甲酸甲酯与二甲砜缩合、还原、脱甲基制备3,5-二羟基苯乙… 相似文献
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N. A. Shams A. M. Kaddah E. I. Enayat Alyaa A. Shalaby A. M. Youssef 《Advanced Synthesis \u0026amp; Catalysis》1989,331(5):757-762
Reaction of acrylonitrile with 4-cyano-5,6-diphenyl pyridazin-3(2H)-one and 3(2H)-thione derivative ( 1a, b ) at elevated temperature gave 7H-5-amino-6-cyano-3,4-diphenylpyrano and thiino [2,3-c] pyridazines ( 2a, b ), respectively. However, the reaction of 4-carbethoxy pyridazine derivatives ( 1c, d ) with the same reagent, under the same conditions afforded 6H, 7H-6-cyano-3,4-diphenyl-5-oxopyrano ( 3a ) and thiino [2,3-c] pyridazine ( 3b ), respectively. In addition, treatment of ( 1a, c ) and ( 1b, d ) with acrylonitrile ar reflux in alkaline medium give the respective 3-(2′-cyanoethyloxo) ( 7a, c ) and 3-2′-cyanoethylthio ( 7b, d ) pyridazine derivatives. Prolonged alkaline hydrolysis of either ( 1a, c ) or ( 7a, c ) yielded the same product ( 8a ). Also hydrolysis of ( 1b, d ) and ( 7b, d ) afforded one and the same product ( 8b ). The structures of the products were assigned on the basis of satisfactory analytical and spectroscopic data. 相似文献
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R Boscencu AS Oliveira DP Ferreira LF Ferreira 《International journal of molecular sciences》2012,13(7):8112-8125
Synthesis and spectral evaluation of new zinc and copper unsymmetrical mesoporphyrinic complexes are reported. Zn(II)-5-(4-acetoxy-3-methoxyphenyl)-10,15,20- tris-(4-carboxymethylphenyl)porphyrin, Zn(II)-5-[(3,4-methylenedioxy)phenyl]-10,15,20- tris-(4-carboxymethylphenyl)porphyrin, Cu(II)-5-(4-acetoxy-3-methoxyphenyl)-10,15,20- tris-(4-carboxymethylphenyl)porphyrin and Cu(II)-5-[(3,4-methylenedioxy)phenyl]-10,15,20- tris-(4-carboxymethylphenyl)porphyrin were synthesized using microwave-assisted synthesis. The complexes were characterized by elemental analysis, FT-IR, UV-Vis, EPR and NMR spectroscopy, which fully confirmed their structure. The spectral absorption properties of the porphyrinic complexes were studied in solvents with different polarities. Fluorescence emission and singlet oxygen formation quantum yields were evaluated for the compounds under study, revealing high yields for the zinc derivatives. The copper complexes are not emissive and only display residual capacity for singlet oxygen formation. 相似文献
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3,4-亚甲二氧基苯乙胺的合成新方法 总被引:1,自引:0,他引:1
以胡椒胺为原料,通过Sandmeyer反应制得3,4-亚甲二氧基溴苯(收率75.0%),再经Grignard反应(收率74.8%)、酯化反应(收率94.0%)和Gabriel反应(收率63.0%)制备出3,4-亚甲二氧基苯乙胺,并通过红外光谱和色谱-质谱联用确定了目标产物的结构。讨论温度对各步反应的影响,确定了最佳反应条件。 相似文献
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研究南海红树林内生真菌Gx-4b的代谢产物。采用反复硅胶柱色谱法、Sephadex LH-20凝胶色谱法等进行分离纯化,并通过理化常数测定和光谱分析鉴定其化学结构。从南海红树林内生真菌Gx-4b的菌体中分离得到4个代谢产物。经波谱解析,分别为1,4-dihydroxy-2-methoxy-7-methylanthracene-9,10-dione(1),3,8-dihydroxy-3-methyl-3,4-dihydroisochromen-1-one(2),8-hydroxy-6-methoxy-3-methyl-3,4-dihydroisochromen-1-one(3),3-hydroxy-4-(2-hydroxy-6-methylheptan-2-yl)benzoic acid(4)。所有化合物均首次从南海红树林内生真菌Gx-4b中分离得到。 相似文献
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本文以3,4-二氯苯胺为原科合成了3,4-二氯苯肼盐酸盐,再与乙酰乙酸乙酯环化,合成2-(3,4-二氯苯基)-2,4-二氢-5-甲基-3H-吡唑啉-3-酮.用红外光谱、熔点仪、高效液相色谱和核磁共振对产品进行了表征和检测.考察了盐酸用量、还原剂、反应温度、溶剂和后处理对转化率和纯度的影响.结果表明:选用氯化亚锡作还原剂,在低温和盐酸过量下有利于提高3,4-二氯苯肼盐酸盐的收率.选用V(乙醇)∶V(水)=6∶1为溶剂,75℃下反应4小时,以碳酸钠调节pH =7,2-(3,4-二氯苯基)-2,4-二氢-5-甲基-3H-吡唑啉-3-酮转化率为82.6%,熔点163~164℃,纯度述96%. 相似文献
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3,4-Dihydro-2H-benz[1,3]oxazin-2-ones 3 are obtained from 2-acyl(or aroyl)-cyanatobenzenes 2 and anisole. The reaction proceeds under Friedel-Crafts conditions via DIMROTH rearrangement. Compounds 2 , dissolved in diethyl ether, react with 1 in the presence of finely powdered KOH at ambient temperature leading to 8 . The structure of 8b is confirmed by X-ray structure analysis. (Z)-4-Ethylidene - 3,4 - dihydro -2H-benz[1,3] oxazin-2-one 9 is formed upon treatment of 2-cyanatopropiophenone 2b with diluted hydrochloric acid. The ethylene derivative 5 is obtained from 4 upon reaction with cyanogen bromide/triethyl amine. 相似文献
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Two intermediates were isolated during the cyclization of 1-cyclohexyl-3-(o-phenyloximino)-pyrrolidine-2-one to 2-cyclohexyl-1, 3-dihydro-3-oxo-pyrrolo [3,4-b] benzofuran. Their structures indicate that the reaction mechanism is analogous to the one proposed for the Fischer indole synthesis. 相似文献