Efficient deallylation of allyl phenyl ethers by molecular iodine in PEG-400 and their utility for flavone synthesis
Rapid and efficient deallylation of allyl phenyl ethers by molecular iodine (20 mol%) in polyethylene glycol-400 at 60 °C has been reported. This method has short reaction time, readily available catalyst, and reuse of reaction medium with good yield. The utility of this methodology has been extended to flavone synthesis. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications for the following free supplemental resource(s): Full experimental and spectral details.]
A new method for the facile synthesis of hydroxylated flavones by using allyl protection
The iodine-induced oxidative cyclization of 2′-hydroxychalcones provides a simple, highly efficient approach to various hydroxy flavones and analogues. This process is run under mild conditions, tolerates various functional groups, and provides hydroxy flavones in good to excellent yield. The allyl-protected acetophenones and benzaldehydes were smoothly deallylated under similar conditions.
Nawghare,Sakate,Lokhande
p. 291 - 302
(2014/04/17)
Synthesis, characterization and antimicrobial screening of some novel chalcones and their derivatives
Synthesis of some novel 2-(4-(allyloxy)-3-methoxyphenyl)-4H-chromen-4-ones 5a-f and 2-(4-(allyloxy)-3-methoxyphenyl)- 3-chloro-4H-chromen-4-ones 6a-f by oxidative cyclisation of (E)-3-(4-allyloxy)-3-methoxyphenyl)-1-(2-hydroxyphenyl) prop-2-en-1-ones usin
Chate, Asha V.,Joshi, Ratnadeep S.,Mandhane, Priyanka G.,Gill, Charansingh H.
p. 1642 - 1648
(2013/01/15)
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