4010-25-7Relevant articles and documents
Directing group assisted copper-catalyzed chemoselective O-aroylation of phenols and enols using alkylbenzenes
Rout, Saroj Kumar,Guin, Srimanta,Banerjee, Arghya,Khatun, Nilufa,Gogoi, Anupal,Patel, Bhisma K.
supporting information, p. 4106 - 4109 (2013/09/12)
By using alkylbenzenes as aroyl surrogates, copper(II) catalyzed chemoselective O-aroylations of 1,3-dicarbonyl compounds and phenolic-OH ortho to carbonyl (-CHO,-COR) groups have been achieved. A dual mechanism operating in tandem for these transformations has been supported by a crossover experiment.
Epoxidation of Flavones by Dimethyldioxirane
Adam, Waldemar,Golsch, Dieter,Hadjiarapoglou, Lazaros
, p. 7292 - 7297 (2007/10/02)
The synthesis of epoxides 2 by epoxidation of flavones 1 with isolated dimethyldioxirane (as acetone solution) at subambient temperatures is reported.These labile epoxides were isolated and completely characterized by UV, IR, 1H and 13C NMR, MS, and C,H analyses.Warming to room temperature led to rearrangement to afford quantitatively the 3-hydroxyflavones 3b,h,i,n.Treatment of the epoxides 2b,f with methanol led to the 3-hydroxy-2-methoxyflavanones 4b,f, as a mixture of cis and trans isomers.