Demethylation-Sulfonation of 2',3',4'-Trimethoxyflavones
摘要:
Total demethylation of 2',3',4'-trimethoxyflavones with sulfuric acid was realised at mild temperature giving respective 2',3', 4'-trihydroxyflavone-5'-sulfonic acids. A multi steps mechanism is proposed in the light of earlier results and the complete assignment of the H-1 and C-13 NMR spectra of a suggested 3'-hydroxy-2',4'-dimethoxy intermediate.
Imafuku, Kimiaki; Honda, Masaaki; McOmie, J. F. W., Synthesis, 1987, # 2, p. 199 - 201
作者:Imafuku, Kimiaki、Honda, Masaaki、McOmie, J. F. W.
DOI:——
日期:——
Synthesis of 2′,3′,4′-trihydroxyflavone (2-D08), an inhibitor of protein sumoylation
作者:Yeong Sang Kim、Samantha G.L. Keyser、John S. Schneekloth
DOI:10.1016/j.bmcl.2014.01.010
日期:2014.2
Protein sumoylation is a dynamic posttranslational modification involved in diverse biological processes during cellular homeostasis and development. Recently sumoylation has been shown to play a critical role in cancer, although to date there are few small molecule probes available to inhibit enzymes involved in the SUMO conjugation process. As part of a program to identify and study inhibitors of sumoylation we recently reported the discovery that 2',3',4'-trihydroxyflavone (2-D08) is a cell permeable, mechanistically unique inhibitor of protein sumoylation. The work reported herein describes an efficient synthesis of 2-D08 as well as a structurally related but inactive isomer. We also report an unanticipated Wessely-Moser rearrangement that occurs under vigorous methyl ether deprotection conditions. This rearrangement likely gave rise to 2-D08 during a deprotection step, resulting in 2-D08 appearing as a contaminant in a screening well from a commercial supplier. (C) 2014 Published by Elsevier Ltd.
IMAFUKU KIMIAKI; HONDA MASAAKI; MCOMIE J. F. W., SYNTHESIS,(1987) N 2, 199-201
作者:IMAFUKU KIMIAKI、 HONDA MASAAKI、 MCOMIE J. F. W.
DOI:——
日期:——
A novel one-pot synthesis of flavones
作者:Meng-Yang Chang、Min-Chen Tsai、Chun-Yi Lin
DOI:10.1039/d1ra00534k
日期:——
In this paper, a one-pot facile route for the BiCl3/RuCl3-mediated synthesis of functionalized flavones is described, including: (i) intermolecular ortho-acylation of substituted phenols with cinnamoyl chlorides, and (ii) intramolecular cyclodehydrogenation of the resulting o-hydroxychalcones. The reaction conditions are discussed herein.
Demethylation-Sulfonation of 2',3',4'-Trimethoxyflavones
作者:Amar Habsaoui、José Luis Franquet Cami、Emile M. Gaydou、Jean-Claude Wallet
DOI:10.3987/com-99-8546
日期:——
Total demethylation of 2',3',4'-trimethoxyflavones with sulfuric acid was realised at mild temperature giving respective 2',3', 4'-trihydroxyflavone-5'-sulfonic acids. A multi steps mechanism is proposed in the light of earlier results and the complete assignment of the H-1 and C-13 NMR spectra of a suggested 3'-hydroxy-2',4'-dimethoxy intermediate.