Poly(4-vinylpyridinium) hydrogensulfate catalyzed synthesis of 12-aryl-12H-indeno[1,2-b]naphtho[3,2-e]pyran-5,11,13-triones
作者:Nader Ghaffari Khaligh
DOI:10.1016/j.tetlet.2012.01.092
日期:2012.3
A simple and facile synthesis of 12-aryl-12H-indeno[1,2-b]naphtho[3,2-e]pyran-5,11,13-trione derivatives was accomplished via the one-pot condensation of 2-hydroxynaphthalene-1,4-dione, aldehydes, and 2H-indene-1,3-dione at 100 °C under solvent-free conditions in the presence of the solid acid catalyst, poly(4-vinylpyridinium) hydrogensulfate. This method has the advantages of high yields, clean reactions
通过2-锅一键缩合完成了12-芳基-12 H-茚并[1,2- b ]萘[3,2 - e ]吡喃-5,11,13-三酮衍生物的简单合成。在无溶剂条件下,在固体酸催化剂,聚(4-乙烯基吡啶)硫酸氢盐的存在下,在无溶剂的条件下,于100℃下,对羟基萘-1,4-二酮,醛和2 H-茚-1,3-二酮进行处理。该方法具有收率高,反应干净,方法简单,反应时间短的优点。该催化剂可以循环使用四次而不会明显损失活性。通过IR,1 H NMR和元素分析证实了新化合物的结构。
N-Sulfonic acid poly(4-vinylpyridinium) hydrogen sulfate as an efficient and reusable solid acid catalyst for one-pot synthesis of xanthene derivatives in dry media under ultrasound irradiation
作者:Nader Ghaffari Khaligh、Farhad Shirini
DOI:10.1016/j.ultsonch.2014.06.020
日期:2015.1
N-Sulfonic acid poly(4-vinylpyridinium) hydrogen sulfate catalyzed efficiently the synthesis of xanthene derivatives under ultrasonic irradiation at room temperature, which has prompted various concerns involving cost and environmental persistence. This methodology shows the effect of presence of anion hydrogen sulfate as an important and effective factor on the promotion of the one-pot multi-components and condensation reactions. The catalyst can be recovered by simple filtration and used for several times without a significant loss of catalytic activity. (C) 2014 Elsevier B.V. All rights reserved.