A one-pot, pseudo four-component synthesis of novel benzopyrano[2,3-b]pyridines under solvent-free conditions
作者:Abolfazl Olyaei、Mohsen Vaziri、Reza Razeghi
DOI:10.1016/j.tetlet.2013.01.124
日期:2013.4
facile, one-pot, pseudofour-component catalyst- and solvent-free synthesis of novel benzopyrano[2,3-b]pyridines is achieved by Michael addition of various naphthols to iminocoumarin derivatives obtained from Knoevenagel condensation of salicylaldehydes with malononitrile, which can be attacked by another molecule of malononitrile to afford the title products. The advantages of this procedure are mild
一种新型的苯并吡喃并[2,3- b ]吡啶的轻质,一锅,假四组分催化剂和无溶剂合成方法是通过将各种萘酚加成到水杨醛与丙二腈的Knoevenagel缩合得到的亚氨基香豆素衍生物中来实现的,可能会受到另一分子丙二腈的攻击而获得标题产物。该方法的优点是反应条件温和,产物收率高,通用性强,反应时间短和操作简便。
Synthesis and anti-inflammatory activities of 4H-chromene and chromeno[2,3-b]pyridine derivatives
作者:Shu-Ting Chung、Wen-Hsin Huang、Chih-Kuo Huang、Feng-Cheng Liu、Ren-Yeong Huang、Chin-Chen Wu、An-Rong Lee
DOI:10.1007/s11164-015-2081-7
日期:2016.2
Several derivatives of 4H-chromene and chromeno[2,3-b]pyridine were efficiently prepared under microwave irradiation in a one-pot reaction, and their anti-inflammatory activities were evaluated. Six synthetic products (1b, 1c, 1h, 2d, 2j, and 2l) exhibited more powerfully inhibited the production of tumor necrosis factor-α-induced nitric oxide (NO) than quercetin and exhibited comparable cell viability in both human and porcine chondrocytes. In particular, 2d at dosages of 10 and 20 mg/kg had a very potent anti-inflammatory effect by suppressing the formation of carrageenan-induced rat paw edema and prostaglandin E2. The results herein suggest that these compounds may have potential as structural templates in the design and development of new anti-inflammatory drugs.