A series of fused 6,6-bicyclic chromenones was investigated for activity against the bradykinin B1 receptor. SAR studies based on a pharmacophore model revealed compounds with high affinity for both human and rabbit B1. These compounds demonstrated favorable pharmacokinetic properties and 5-chlorochromenone 15 was efficacious in a carrageenan-induced mechanical hyperalgesia model for chronic pain. (C) 2011 Elsevier Ltd. All rights reserved.
d selenylation/cyclization of enaminones have been realized for the practical synthesis of 3‐selanyl‐4H‐chromen‐4‐ones. This reaction is performed in the mild conditions, no transition metal catalyst or photocatalysts and no additional oxidants are required. In addition, the 3‐selanyl‐4H‐chromen‐4‐ones could be easily converted to selanyl‐functionalized pyrimidines by reacting with benzamidine substrates
已经实现了简单而有效的可见光促进的烯胺酮的硒化/环化反应,可实际合成3-Selanyl-4 H -chromen-4- 。该反应在温和的条件下进行,不需要过渡金属催化剂或光催化剂,也不需要其他的氧化剂。此外,通过与苯甲idine底物反应,可以很容易地将3-selanyl-4 H -chromen-4 -ones转化为selanyl-functionalized嘧啶。
A catalyst-free approach to 3-thiocyanato-4H-chromen-4-ones
A facile and efficient approach to 3-thiocyanato-4H-chromen-4-ones from enaminones and KSCN was realized at room temperature. In addition, one-pot synthesis of 3-thiocyanatochromenones from 2-hydroxylacetophenones was also developed.
A sequential one-pot, simple and convenient method is described for the synthesis of 3-selenocyanato-4 H -chromen-4-ones by addition, first of DMF-DMA and then of triselenodicyanide as electrophile.
2,3-Dichloro-5,6-dicyano-1,4-benzoquinone Mediated Tandem Oxidative-Coupling/Annulation of Enaminones with 1,3-Diarylpropenes for the Synthesis of 3-Allylchromones
作者:Dongping Cheng、Mingliang Wang、Zhiteng Deng、Xianhang Yan、Xiaoliang Xu、Jizhong Yan
DOI:10.1002/ejoc.201900793
日期:2019.7.31
The tandem reaction of enaminones with 1,3‐diarylpropenes is mediated by DDQ, which involves the oxidativecoupling and the intramolecular cyclization reactions. It provides a convenient, efficient and metal‐free method for the synthesis of 3‐allylated chromones and quinolone.
The Domino Chromone Annulation and a Transient Halogenation-Mediated C–H Alkenylation toward 3-Vinyl Chromones
作者:Leiqing Fu、Zhongrong Xu、Jie-Ping Wan、Yunyun Liu
DOI:10.1021/acs.orglett.0c03548
日期:2020.12.18
Reported in this paper is a step economical method toward the general synthesis of 3-vinyl chromones via the reactions between readily available o-hydroxyphenyl enaminones and various alkenes. The domino C–H alkenylation and chromone annulation of the enaminones are involved, which enables the synthesis of 3-vinyl chromone products using both terminal and internal alkenes via a key process of transient C–H