A novel one pot route to flavones under dual catalysis, an organo- and a Lewis acid catalyst
作者:Gourhari Maiti、Rajiv Karmakar、Rudraksha N. Bhattacharya、Utpal Kayal
DOI:10.1016/j.tetlet.2011.08.078
日期:2011.10
Substituted phenylacetylenes react with various o-hydroxy aromatic aldehydes under dual catalysis of piperidine and FeCl3 in refluxing toluene to yield flavones in good to excellent yield. Atmospheric oxygen acts as stoichiometric oxidant in the process. Some of these compounds had been recently reported to show fair insecticidal activity against Spodoptera frugiperda. (C) 2011 Elsevier Ltd. All rights reserved.
MAZUMDAR, A. K. D.;SAHA, G. C.;SINHA, T. K.;BANERJI, K. D., J. INDIAN CHEM. SOC., 1985, 61, N 11, 996-997
作者:MAZUMDAR, A. K. D.、SAHA, G. C.、SINHA, T. K.、BANERJI, K. D.
DOI:——
日期:——
Mazumdar, A. K. D.; Saha, G. C.; Sinha, T. K., Journal of the Indian Chemical Society, 1984, vol. 61, # 11-12, p. 996 - 997
作者:Mazumdar, A. K. D.、Saha, G. C.、Sinha, T. K.、Banerji, K. D.
DOI:——
日期:——
Radical-Induced Cascade Annulation/Hydrocarbonylation for Construction of 2-Aryl-4H-chromen-4-ones
cleavage/intramolecular 6-endo-dig annulation/hydrocarbonylation for the synthesis of the valuable 2-aryl-4H-chromen-4-ones is described. This practical synthesis strategy utilizes propargylamines and air as the oxygen source and green carbonylation reagent, in which propargylamines are activated by the inexpensive and available dimethyl 2,2′-azobis(2-methylpropionate) (AIBME) and (PhSe)2 as the radical initiators