An efficient one-pot synthesis of diarylpyrazolo[1,5-a]pyrimidine from isoflavones
作者:Zun-Ting Zhang、Yu-Qing Ma、Yong Liang、Dong Xue、Qing He
DOI:10.1002/jhet.546
日期:2011.3
Direct synthetic methods of 6,7‐diphenylpyrazolo[1,5‐a]pyrimidine derivatives have been developed. Cyclocondensation of isoflavones with 3‐aminopyrazole in the presence of sodium methoxide as alkali promoter gave 6,7‐diphenylpyrazolo[1,5‐a]pyrimidines in moderate to good yields. J. Heterocyclic Chem., (2011).
已经开发了直接合成6,7-二苯基吡唑并[1,5- a ]嘧啶衍生物的方法。在甲醇钠作为碱促进剂的情况下,异黄酮与3-氨基吡唑的环缩合反应可中等至良好收率,得到6,7-二苯基吡唑并[1,5- a ]嘧啶。J.杂环化学。(2011)。
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.
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。
One-step synthesis of 2,4,5-trisubstituted pyrimidines
A simple and straightforward methodology towards the synthesis of 2,4,5‐trisubstitutedpyrimidines has been developed by one‐step reaction of isoflavones with thiourea or guanidine. Ten 2‐mercapto‐4,5‐diphenylpyrimidines and eight 2‐amino‐4,5‐diphenylpyrimidines were reported. All of them were characterized by FT‐IR, NMR, and elemental analysis. A variety of substrates can participate in the process
Microwave Irradiation for Accelerating Synthesis of 5,6-Diphenylimidazo[1,2-<i>a</i>]pyrimidines Based on Isoflavones
作者:Wen-Yong Han、Zun-Ting Zhang、Li Qiu、Gang Li
DOI:10.1080/00397911.2010.516411
日期:2011.12.15
Abstract Microwaveirradiation was used to accelerate the cyclocondensation of isoflavones with 2-aminoimidazole to synthesize 5,6-diphenylimidazo[1,2-a]pyrimidines. A series of 17 new compounds were characterized by Fourier transform infrared, NMR, and elemental analysis. 5-(2-Hydroxyl-4-isopropoxyphenyl)-6-phenylimidazo-[1,2-a]pyrimidine was determined by x-ray diffraction. A variety of substrates