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。
Facile Synthesis of Diarylpyrazolo[1,5-<i>a</i>]pyrimidine from Isoflavones
作者:Junling Yang、Zunting Zhang、Qing He
DOI:10.1002/jhet.1633
日期:2014.1
A new facile and straightforward method for synthesis of 2-methyl-6,7-diphenyl- pyrazolo[1,5-a]pyrimidines has been described. The cyclocondensation of isoflavones with 3-amino-5-methylpyrazole in the presence of sodium methoxide gave fused 2-methyl-6,7-diphenylpyrazolo[1,5-a]pyrimidines in moderate to good yields. A series of 20 new compounds were obtained and characterized by FT-IR, NMR, and elemental
已经描述了一种合成2-甲基-6,7-二苯基-吡唑并[1,5- a ]嘧啶的简便易行的新方法。在甲醇钠存在下,异黄酮与3-氨基-5-甲基吡唑的环缩合反应以中等至良好的产率得到了稠合的2-甲基-6,7-二苯基吡唑并[1,5- a ]嘧啶。获得了一系列20种新化合物,并通过FT-IR,NMR和元素分析对其进行了表征。
Microwave Irradiation for Accelerating Synthesis of [1,2,4]Triazole[4,3-a]-pyrimidines Based on Isoflavones
作者:Zun-Ting Zhang、Juan Xie、Mu-Lin Zhu、Dong Xue
DOI:10.1055/s-0030-1258105
日期:2010.7
Microwaveirradiation was used to accelerate the cyclocondensation of isoflavones and 3-amino-1,2,4-triazoles in the presence of sodium methoxide to produce 6,7-diphenyl[1,2,4]-triazolo[4,3-a]pyrimidines in good to moderate yields.
developed for one-potsynthesis of a series of 2H-phenanthro[9,10-c]pyrazoles in EtOH by two dehydration processes. Firstly, 3,4-diaryl-1H-pyrazoles were synthesized by the cyclocondensation of isoflavones and hydrazinehydrate in refluxing EtOH. Secondly, the final target products 2H-phenanthro[9,10-c]pyrazoles were given by photocyclization and dehydration of 3,4-diaryl-1H-pyrazoles in 1:1 (v/v) EtOH–H2O
开发了一种环境友好,高效的方法,用于一锅合成一系列2 H-菲并[9,10- c ]吡唑类化合物。乙醇通过两个脱水过程。首先,通过环缩合反应合成了3,4-二芳基-1 H-吡唑类化合物。异黄酮 和 水合肼 在回流中 乙醇。其次,通过3 :4-二芳基-1 H-吡唑以1 :1(v / v)的光环化和脱水作用,得到最终目标产物2 H-菲并[9,10- c ]吡唑乙醇–高氧2。这种方法的优点是催化剂-合成路线短,反应条件温和且易于后处理。另外,测定了2 H-菲并[9,10- c ]吡唑的荧光性质。
One-Step Synthesis of Diarylpyrazolo[3,4-<i>b</i>]pyridines from Isoflavones
作者:Zun-Ting Zhang、Yong Liang、Yu-Qing Ma、Dong Xue、Jun-Ling Yang
DOI:10.1021/cc1000506
日期:2010.7.12
A new concise, facile, and efficient method for the synthesis of 3-hydroxy-5,6-diphenylpyrazolo[3,4-b]pyridine derivatives has been described. The cyclocondensation of isoflavones with 3-amino-5-hydroxypyrazole in the presence of sodium methoxide gave fused heteroaromatic 3-hydroxy-5,6-diphenylpyrazolo[3,4-b]pyridines in moderate to good yields.
已经描述了一种合成3-羟基-5,6-二苯基吡唑并[3,4- b ]吡啶衍生物的简洁,简便而有效的新方法。在甲醇钠存在下,异黄酮与3-氨基-5-羟基吡唑的环缩合反应以中等至良好的产率得到了稠合的杂芳族3-羟基-5,6-二苯基吡唑并[3,4- b ]吡啶。