Yb(OTf)<sub>3</sub>-Catalyzed Reactions of 5-Alkylidene Meldrum's Acids with Phenols: One-Pot Assembly of 3,4-Dihydrocoumarins, 4-Chromanones, Coumarins, and Chromones
作者:Eric Fillion、Aaron M. Dumas、Bryan A. Kuropatwa、Neil R. Malhotra、Tamsyn C. Sitler
DOI:10.1021/jo052000t
日期:2006.1.1
Yb(OTf)3-catalyzed annulation reactions of phenols with 5-alkylidene Meldrum's acids enabled the synthesis of structurally diverse heterocycles in high isolated yields. A series of 4-substituted 3,4-dihydrocoumarins, 2,2-disubstituted 4-chromanones, coumarins, and 2-substituted chromones were readily and efficiently assembled, including the naturallyoccurringcoumarins citropten, scoparone, and ayapin
Microwave-Assisted One-Pot Synthesis of Dihydrocoumarins from Phenols and Cinnamoyl Chloride
作者:Yuan Ma、Zhen Zhang、Yufen Zhao
DOI:10.1055/s-2008-1042921
日期:——
A facile approach has been developed for the synthesis of dihydrocoumarin derivatives through the reaction of phenols and cinnamoyl chloride in the presence of ecofriendly solid-acid catalyst montmorillonite K-10 via a tandem esterification-Friedel-Crafts alkylation process under microwave irradiation. The catalyst could be easily recovered and recycled.
Small molecule amides as potent ROR-γ selective modulators
作者:Pasha M. Khan、Bahaa El-Dien M. El-Gendy、Naresh Kumar、Ruben Garcia-Ordonez、Li Lin、Claudia H. Ruiz、Michael D. Cameron、Patrick R. Griffin、Theodore M. Kamenecka
DOI:10.1016/j.bmcl.2012.11.025
日期:2013.1
The structure-activity relationship study of a diphenylpropanamide series of ROR-gamma selective modulators is reported. Compounds were screened using chimeric receptor Gal4 DNA-binding domain (DBD)-NR ligand binding domain cotransfection assay in a two-step format. Three different regions of the scaffold were modified to assess the effects on repression of ROR-gamma transcriptional activity and potency. The lead compound 1 exhibits modest mouse pharmacokinetics and an acceptable in vitro profile which makes it a suitable in vivo probe to interrogate the functions of ROR-gamma in animal models of disease. (C) 2012 Elsevier Ltd. All rights reserved.