Topic
Benzopyran
About: Benzopyran is a research topic. Over the lifetime, 1889 publications have been published within this topic receiving 15235 citations.
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TL;DR: In this paper, a cycloisomerization of aryl propargyl ethers efficiently proceeds, in the presence of [Au(PPh3)]NTf2 as catalyst to give benzopyrans, e.g. (III) in high chemoselectivity.
Abstract: Cycloisomerization of aryl propargyl ethers efficiently proceeds, in the presence of [Au(PPh3)]NTf2 as catalyst to give benzopyrans, e.g. (III) in high chemoselectivity.
TL;DR: In this paper, an efficient method was developed for the synthesis of 3-[(2-amino-4-arylthiazolium-5-yl)(aryl)methyl]-2-oxo-2H-1-benzopyran-4olates via a tandem reaction involving 4-hydroxycoumarin, benzald...