One-step synthesis of 5,6-diaryl pyridine-2(1H)-thiones from isoflavones
作者:Juanjuan Wang、Zunting Zhang、Wenli Wang、Fangfang Liu
DOI:10.1039/c3ob27247h
日期:——
The one-step cyclocondensation of substituted isoflavones with cyanothioacetamide in the presence of sodium hydroxide gave an array of 3-cyano-5,6-diaryl pyridine-2(1H)-thiones in good yields. The procedure involves base-mediated ring opening of the isoflavones and subsequent Knoevenagel condensation between the 1,3-dicarbonyl intermediate generated from the isoflavones and cyanothioacetamide, followed
The 2,3-diarylpyrimido[1,2-a]benzimidazole derivatives were prepared by one-step cyclocondensation of 2-aminobenzimidazole with isoflavone in methanol. Single-crystal diffraction analysis was performed for 2-(2-hydroxyl-4-isopropoxy-phenyl)-3-phenylpyrimido[1,2-a]benzimidazole. The fluorescence properties of the fused 2, 3-diarylpyrimido[1, 2-a]benzimidazole were evaluated.
通过2-氨基苯并咪唑与异黄酮在甲醇中的一步缩合反应来制备2,3-二芳基嘧啶并[1,2- a ]苯并咪唑衍生物。对2-(2-羟基-4-异丙氧基-苯基)-3-苯基嘧啶基[1,2- a ]苯并咪唑进行了单晶衍射分析。评价了熔融的2,3-二芳基嘧啶[1,2-a]苯并咪唑的荧光性质。
Simple and Efficient Method for Synthesis of 3-Cyano-6,7-diarylpyrazolo[1,5-<i>a</i>]pyrimidine from Isoflavones
Abstract A series of 3-cyano-6,7-diarylpyrazolo[1,5-a]pyrimidines have been synthesized directly from the 5-amino-4-cyano-1H-pyrazole and isoflavones. The target compound was obtained by a condensation reaction. Structures of compounds were demonstrated by Fourier transform infrared, NMR, and elemental analysis. The advantages of this synthetic route are simple operation, mild reaction conditions,
One-Step Synthesis of 1-(4,5-Diphenylpyrimidin-2-yl)thiourea
作者:Wen-Yong Han、Zun-Ting Zhang、Ying-Chun Zhang、Dong Xue、Gang Li
DOI:10.1002/hlca.200900438
日期:——
AbstractA simple and straightforward methodology toward the synthesis of novel 1‐(4,5‐diphenylpyrimidin‐2‐yl)thiourea has been developed by a one‐step reaction of isoflavones with amidinothiourea. A series of 16 new compounds was synthesized. All compounds were characterized by FT‐IR, NMR, and elemental analysis. The structure of a typical compound was established by X‐ray diffraction. A variety of substrates can participate in the process with good yields and high purities, making this methodology suitable for library synthesis in drug discovery.
Synthesis of 5,6-Diarylpyridin-2(1<i>H</i>)-ones from Isoflavones
作者:Mulin Zhu、Zunting Zhang、Dong Xue、Jinfeng Qiao、Yong Liang、Stanislaw F. Wnuk
DOI:10.1002/cjoc.201300279
日期:2013.8
AbstractA simple method for the cyclocondensation of substituted isoflavones with cyanoacetamide in the presence of sodium hydroxide to give an array of 3‐cyano‐5,6‐diarylpyridin‐2(1H)‐ones in good yields is reported.