Photoredox Functionalization of 3-Halogenchromones, 3-Formylchromones, and Chromone-3-carboxylic Acids: Routes to 3-Acylchromones
作者:Satenik Mkrtchyan、Viktor O. Iaroshenko
DOI:10.1021/acs.joc.0c00537
日期:2020.6.5
describes a set of new and efficient syntheticroutes toward 3-acyl-substituted chromones ranging from readily available chromone precursors, namely 3-halogenchromones, 3-formylchromones, and chromone-3-carboxylic acids by means of visible-light photoredox catalysis. The operationally simple protocols transform a wide variety of chromone derivatives into challenging 3-acyl-substituted chromones in excellent
New Entries to 3-Acylchromones: TM-Catalysed Decarboxylative Cross-Coupling of α-Keto Acids with <i>ortho</i>
-Hydroxyarylenaminones, 2,3-Unsubstituted Chromones and 3-Iodochromones
作者:Satenik Mkrtchyan、Viktor O. Iaroshenko
DOI:10.1002/ejoc.201801231
日期:2018.12.31
Three new entries to 3‐acylchromones utilizing transition metal catalyzed decarboxylative cross‐coupling reactions of α‐keto acids with ortho‐hydroxyenaminones, 2,3‐unsubstituted chromones and 3‐iodochromones are reported. The title methodologies permit a concise synthesis of series of drug‐like chromone derivatives and are suitable for the combinatorial preparation of compounds libraries.
Novel conversion of 3-(α-hydroxybenzyl)flavones to 3-benzoylchromones and 3-cyanoflavones with NaN3/TFA
作者:Asok K Mallik、Falguni Chattopadhyay、Sankar P Dey
DOI:10.1016/s0040-4039(00)00730-9
日期:2000.6
On treatment with NaN3/TFA, 3-(α-hydroxybenzyl)flavones are converted to 3-benzoyl- chromones and 3-cyanoflavones, plausible mechanisms for which have been suggested.