Sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl)ester is employed as a recyclable catalyst for the condensation reaction between aromatic aldehydes and 3-methyl-l-phenyl-5-pyrazolone. This condensation reaction was ...Sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl)ester is employed as a recyclable catalyst for the condensation reaction between aromatic aldehydes and 3-methyl-l-phenyl-5-pyrazolone. This condensation reaction was performed in ethanol under refluxing conditions giving 4,4'-alkylmethylene-bis(3-methyl-5-pyrazolones) in 74-90% yields. The heterogeneous catalyst was recycled and used in eleven runs for the reaction between benzaldehyde and 3-methyl-l-phenyl-5-pyrazolone without losing catalytic activity.展开更多
3-甲基-1-苯基-5-吡唑酮(HMPP)与醋酸锌反应得到配合物[Zn2(MPP)2(CH3COO)2]·H2O。通过元素分析、红外光谱、核磁共振氢谱、热重-差热和扫描电镜对配合物的组成和结构进行了表征。用循环伏安法考察了该配合物的电化学行为,发现其...3-甲基-1-苯基-5-吡唑酮(HMPP)与醋酸锌反应得到配合物[Zn2(MPP)2(CH3COO)2]·H2O。通过元素分析、红外光谱、核磁共振氢谱、热重-差热和扫描电镜对配合物的组成和结构进行了表征。用循环伏安法考察了该配合物的电化学行为,发现其电子转移是准可逆的。通过紫外光谱法研究了它与牛血清白蛋白的相互作用,发现二者通过氢键、van der Waals力结合。该配合物对Pb2+的吸附测试结果表明,在40 min内,配合物对25mg/L的Pb2+的吸附去除率达99.74%。展开更多
An efficient and environmental benign method is reported for the condensation of 3-methyl-1-phenyl-5-pyrazolone with carbonyl compounds in ionic liquids [Bmim]BF4 and [Bmim]PF6 catalyzed by ethylenediammonium diacetate.
A new class of pyrazolone derivatives has been isolated in good to excellent yields from the 2 ： 1 condensation reaction between 3-methyl-1-phenyl-5-pyrazolone and arylaldehydes in the presence of ionic liquid [HMIM]...A new class of pyrazolone derivatives has been isolated in good to excellent yields from the 2 ： 1 condensation reaction between 3-methyl-1-phenyl-5-pyrazolone and arylaldehydes in the presence of ionic liquid [HMIM]HSO4. The compounds were characterised by their IR, NMR spectra, MS and elemental analyses. The important features of the methodology are a wide application range of substrates, higher yields and shorter reaction time.展开更多
The solid state thermal reaction of benzil with 3-methyl-1-phenyl-5-pyrazolone gave the title compound 1 (C_24H_18N_2O_2) and its isomer 2. The crystal structure of the title compound has been determined by X-ray anal...The solid state thermal reaction of benzil with 3-methyl-1-phenyl-5-pyrazolone gave the title compound 1 (C_24H_18N_2O_2) and its isomer 2. The crystal structure of the title compound has been determined by X-ray analysis. The crystal belongs to monoclinic system, space group P2_1/n, with cell parameters a = 7. 479 ( 1 ), b =16. 992(1), c=15. 165(1) A , β= 100. 99(1)°, V= 1891. 9 A￣3, M_r=366. 42, Z=4, D_c= 1. 286 g/cm￣3, μ= 6. 236 cm￣-1, F(000) = 768. In the molecule of 1, benzoyl group and CO group of five-member ring are in cis-positions, the interaction of oxygen atoms leads to the noncoplanarity.展开更多
基金the Islamic Azad University Research Council for partial support of this work
文摘Sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl)ester is employed as a recyclable catalyst for the condensation reaction between aromatic aldehydes and 3-methyl-l-phenyl-5-pyrazolone. This condensation reaction was performed in ethanol under refluxing conditions giving 4,4'-alkylmethylene-bis(3-methyl-5-pyrazolones) in 74-90% yields. The heterogeneous catalyst was recycled and used in eleven runs for the reaction between benzaldehyde and 3-methyl-l-phenyl-5-pyrazolone without losing catalytic activity.
文摘3-甲基-1-苯基-5-吡唑酮(HMPP)与醋酸锌反应得到配合物[Zn2(MPP)2(CH3COO)2]·H2O。通过元素分析、红外光谱、核磁共振氢谱、热重-差热和扫描电镜对配合物的组成和结构进行了表征。用循环伏安法考察了该配合物的电化学行为,发现其电子转移是准可逆的。通过紫外光谱法研究了它与牛血清白蛋白的相互作用,发现二者通过氢键、van der Waals力结合。该配合物对Pb2+的吸附测试结果表明,在40 min内,配合物对25mg/L的Pb2+的吸附去除率达99.74%。
文摘An efficient and environmental benign method is reported for the condensation of 3-methyl-1-phenyl-5-pyrazolone with carbonyl compounds in ionic liquids [Bmim]BF4 and [Bmim]PF6 catalyzed by ethylenediammonium diacetate.
基金Project supported by the National Natural Science Foundation of China （No. 51076174） and the Tianjin National Natural Science Foundation （No. 11JCZDJC21300）.
文摘A new class of pyrazolone derivatives has been isolated in good to excellent yields from the 2 ： 1 condensation reaction between 3-methyl-1-phenyl-5-pyrazolone and arylaldehydes in the presence of ionic liquid [HMIM]HSO4. The compounds were characterised by their IR, NMR spectra, MS and elemental analyses. The important features of the methodology are a wide application range of substrates, higher yields and shorter reaction time.
文摘The solid state thermal reaction of benzil with 3-methyl-1-phenyl-5-pyrazolone gave the title compound 1 (C_24H_18N_2O_2) and its isomer 2. The crystal structure of the title compound has been determined by X-ray analysis. The crystal belongs to monoclinic system, space group P2_1/n, with cell parameters a = 7. 479 ( 1 ), b =16. 992(1), c=15. 165(1) A , β= 100. 99(1)°, V= 1891. 9 A￣3, M_r=366. 42, Z=4, D_c= 1. 286 g/cm￣3, μ= 6. 236 cm￣-1, F(000) = 768. In the molecule of 1, benzoyl group and CO group of five-member ring are in cis-positions, the interaction of oxygen atoms leads to the noncoplanarity.
