1-Benzyl-4-phenyl-1H-1,2,3-triazoles improve the transcriptional functions of estrogen-related receptor γ and promote the browning of white adipose
摘要:
The estrogen-related receptor gamma (ERR gamma) is a potential molecular target for the development of small molecules to stimulate the adipose browning process, which may represent a novel attractive strategy to treat obesity related disorders. The receptor possesses a very small ligand binding cavity and therefore identification of small molecule ERR gamma modulators is a considerable challenge. We have successfully designed and synthesized a series of 1-benzyl-4-phenyl-1H-1,2,3-triazoles and demonstrated that they improve the transcriptional functions of ERR gamma, potently elevating both the mRNA levels and the protein levels of ERR gamma downstream targets. One of the most promising compounds, 4-(1-(4-iso-propylbenzyl)-1H-1,2,3-triazol-4-yl)benzene-1,2-diol (2e) was further shown to directly bind with the ERR gamma ligand binding domain (ERR gamma-LBD) in an isothermal calorimetric (ITC) assay and to thermally stabilize ERR gamma-LBD protein by increasing its melting temperature (T-m) as demonstrated by circular dichroism (CD) spectroscopy. Furthermore, 2e potently stimulates the adipocyte browning process and induces mitochondrial biogenesis both in vitro and in vivo, suggesting the considerable therapeutic potential of this compound for the treatment of obesity and related disorders. (C) 2015 Elsevier Ltd. All rights reserved.
in the solution state (φF=69–87 %) by introduction of electron‐donating alkyl and phenyl groups on two phenoxy groups. In the powder state, 4‐methyl‐ and 4‐methoxy‐phenoxy derivatives exhibited efficient blue fluorescence (φF=52 % and 46 %, respectively). Especially, the 4‐methylphenoxy derivative was thermally stable, and exhibited strong narrow‐band fluorescence in the film state (blue, φF=95 %)
Acid-Catalyzed Cyclization Reactions of Substituted Acetylenic Ketones: A new Approach for the Synthesis of 3-Halofurans, Flavones, and Styrylchromones
作者:Daniel Obrecht
DOI:10.1002/hlca.19890720305
日期:1989.5.3
Acetylenic acetals of type I(Scheme 1) and acetylenic ketones of type III(Scheme 1), 37 and 38(Scheme 7) are versatile synthetic precursors for the synthesis of various heterocycles by acid-catalyzed cyclization reactions. By this way, substituted 3-halofurans of type II and IV(Scheme 1) and flavones and styrylchromones (Scheme 7) can be synthesized in good-to-excellent yields. The high degree of regioselectivity
Synthesis and applications to catalysis of novel cyclopentadienone iron tricarbonyl complexes
作者:Alessandro Del Grosso、Alexander E. Chamberlain、Guy J. Clarkson、Martin Wills
DOI:10.1039/c7dt03250a
日期:——
structures were prepared, in each case using the intramolecular cyclisation of a diyne as a key step. The complexes were generated as enantiomerically enriched through (i) asymmetric synthesis of a C2-symmetric diol following a reported protocol, (ii) resolution of enantiomerically-enriched diastereoisomers formed from a chiral alcohol and (iii) kinetic resolution of a racemic ketone-containing iron tricarbonyl
2‐(alkynylsilylethynyl)phenols, leading to alkynylmethylidene‐benzoxasiloles through concomitant silicon and carbon migration. This unprecedented cycloisomerization presumably proceeds via the formation of rhodium vinylidenes through 1,2‐silicon migration, followed by 1,3‐carbon (alkyne) migration via the formation of hypervalent silicon centers.
The enantioselective synthesis of silicon-stereogenic benzofuranylmethylidene-benzoxasiloles was achieved with moderate enantioselectivity by the cationic rhodium(I)/(S)-BINAP complex-catalyzed desymmetrization of symmetrical bis(2-ethynylphenol)silanes, possessing the tert-butyl and methyl groups on the siliconatom. This reaction involves 1,2-silicon/1,3-carbon migrations and oxycyclization, and