“On-water” organic synthesis: l-proline catalyzed synthesis of pyrimidine-2,4-dione-, benzo[g]- and dihydropyrano[2,3-g]chromene derivatives in aqueous media
In this work, functionalized pyrimidine-2,4-dione-, benzo[g]-, and dihydropyrano[2,3-g]chromene derivatives have been synthesized via a Michael addition of 2-hydroxy-1,4-naphthoquinone or 2,5-dihydroxy-1,4-benzoquinone to the Knoevenagel condensation product of an aldehyde with Meldrum’s acid, dimedone or barbituric acid in the presence of a catalytic amount of l-proline under refluxing conditions
在这项工作中,通过2-羟基-1,4-萘醌或2的迈克尔加成反应合成了功能化的嘧啶-2,4-二酮-,苯并[ g ]-和二氢吡喃并[2,3- g ]色烯衍生物。在催化量的1-脯氨酸存在下,在水中回流条件下,将醛,5-二羟基-1,4-苯醌与醛与梅德鲁姆的酸,二甲酮或巴比妥酸形成Knoevenagel缩合产物,收率良好。
Synthesis of benzo[
<i>b</i>
]xanthene‐triones and tetrahydrochromeno[2,3‐
<i>b</i>
]xanthene tetraones via three‐ or pseudo–five‐component reactions using Fe
<sub>3</sub>
O
<sub>4</sub>
@SiO
<sub>2</sub>
/PEtOx as a novel, magnetically recyclable, and eco‐friendly nanocatalyst
作者:Reyhaneh Rahnamafar、Leila Moradi、Mehdi Khoobi
DOI:10.1002/jhet.3911
日期:2020.4
(XRD), energy‐dispersive X‐ray spectroscopy (EDS) analysis, and vibrating‐sample magnetometer (VSM) techniques. Nanocatalyst was employed to synthesize benzo[b]xanthene‐triones and tetrahydrochromeno[2,3‐b]xanthene tetraones via one‐pot three‐ or pseudo–five‐component reaction between 2‐hydroxy‐1,4‐naphthoquinone or 2,5‐dihydroxy‐1,4‐benzoquinone, aldehyde, and dimedone or 1,3‐cyclohexanedione under
在这项研究中,已将固定在Fe 3 O 4纳米颗粒(Fe 3 O 4 @SiO 2 / PEtOx)上的聚(2-乙基-2-恶唑啉)(PEtOx)构造为一种新型,多相,高效且可回收的纳米催化剂。制备的纳米催化剂通过傅里叶变换红外(FTIR),扫描电子显微镜(SEM),粉末X射线衍射(XRD),能量色散X射线光谱(EDS)分析和振动样品磁强计(VSM)技术进行表征。纳米催化剂被用来合成苯并[ b ]氧杂蒽酮和四氢色素[2,3- b氧杂蒽四酮通过在以下条件下的2-羟基-1,4-萘醌或2,5-二羟基-1,4-苯醌,醛和二甲酮或1,3-环己二酮之间的一锅三或假五组分反应在乙醇中的回流条件。该催化剂可以容易地分离并循环使用几次,而活性没有明显损失。清洁的方法,容易的后处理,温和的反应条件,较短的反应时间和良好至优异的收率,以及催化剂的简单制备是所提出的工作的一些优点。
Fused quinonic compounds
申请人:Centro Atlantico del Medicamento S.A (Ceamed, S.A)
公开号:EP2690094A1
公开(公告)日:2014-01-29
A compound having the formula (I):
for use in treating disease; a composition comprising said fused quinonic compound of formula (I) and at least one pharmaceutically acceptable carrier; as well as a method of modulating a Janus Kinase-Signal Transduction and Activators of Transcription (JAK-STAT) pathway. The activation of a JAK-STAT pathway is associated with several disease states such as immunological and inflammatory diseases, hyperproliferative disorders including cancer, and myeloproliferative diseases.
Efficient and Green Syntheses of 12-Aryl-2,3,4,12-tetrahydrobenzo[<i>b</i>]xanthene-1,6,11-triones in Water and Task-Specific Ionic Liquid
作者:Jitender M. Khurana、Anshika Lumb、Ankita Chaudhary、Bhaskara Nand
DOI:10.1080/00397911.2012.688230
日期:2013.8.18
Abstract Facile and convenientone-pot cascade/tandem approaches for the syntheses of privileged medicinal scaffolds, 12-aryl-2,3,4,12-tetrahydrobenzo[b]xanthene-1,6,11-trione derivatives, have been reported under extremely mild reaction conditions using a catalytic amount of H2SO4 in water or in the presence of the acidic ionic liquid bmim[HSO4], which could be recycled. Supplemental materials are
申请人:CENTRO ATLANTICO DEL MEDICAMENTO S.A (CEAMED, S.A.)
公开号:US20150175585A1
公开(公告)日:2015-06-25
A compound having the formula (I):
for use in treating a disease; a composition comprising said fused quinonic compound of formula (I) and at least one pharmaceutically acceptable carrier; as well as a method of modulating a Janus Kinase-Signal Transduction and Activators of Transcription (JAK-STAT) pathway. The activation of a JAK and/or STAT pathways are associated with several disease states such as immunological and inflammatory diseases, hyperproliferative disorders including cancer, and myeloproliferative diseases.