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
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。
Arylation of <i>ortho</i>-Hydroxyarylenaminones by Sulfonium Salts and Arenesulfonyl Chlorides: An Access to Isoflavones
作者:Satenik Mkrtchyan、Viktor O. Iaroshenko
DOI:10.1021/acs.joc.0c02294
日期:2021.4.2
diversities of bench-stable and easy-to-use sulfonium salts and arenesulfonyl chlorides. Both developed methods, namely the light-mediated photoredox and electrophilic arylation, showed good efficiency, and are feasible for the preparation of 3-arylchromones in good-to-excellent yields. This work showcases the first described attempt where the sulfonium salts and arenesulfonyl chlorides were successfully utilized
An efficient cross-coupling of 3-iodochromones with triarylbismuths under catalytic palladium conditions is reported. Triarylbismuths were employed as substoichiometric multicoupling nucleophiles for the synthesis of a variety of substituted isoflavones. Under the established protocol, cross-coupling reactions were found to be very efficient, furnishing high yields of products.
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.