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Benzopyrans

About: Benzopyrans is a research topic. Over the lifetime, 694 publications have been published within this topic receiving 8830 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the interaction of 2-iminocoumarin-3 carboxamides with a series of 2aminothiophene-3-carboxamide was studied.
Abstract: In the course of our research on the synthesis of coumarins, the interaction of 2-iminocoumarin-3-carboxamides with a series of 2-aminothiophene-3-carboxamides was studied. It was established that the initial products - 2-substituted coumarin-3-carboxamides - can undergo rearrangement to 2-(coumarin-3-yl)thieno[2,3-d]pyrimidin-4-ones by refluxing in DMF.

9 citations

Journal ArticleDOI
TL;DR: In this article, the synthesis of functionalized 2,2-disubstituted 2 H -1-benzopyrans was achieved by condensing 2,3,5-trimethylhydroquinone (TMHQ) with α,β-unsaturated aldehydes or α, β-unaturated acetals under acidic conditions.

9 citations

Journal ArticleDOI
TL;DR: In this article, a general and practical chemistry route to the synthesis of polyfunctionlized benzopyrans using tetrabutylammonium bromide (TBABr) as the catalyst (10 mol%) is described.
Abstract: A general and practical chemistry route to the synthesis of polyfunctionlized benzopyrans using tetrabutylammonium bromide (TBABr) as the catalyst (10 mol%) is described. This method provides several advantages such as neutral conditions, high yields and simple work-up procedure. In addition, water was chosen as a green solvent.

9 citations

Journal ArticleDOI
TL;DR: In this paper, the conformation of the dihydropyran ring of 2-benzopyrans and the stereochemistry of its substituents were determined by the interaction between dihydrophyran rings.

9 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20234
20229
20214
20203
20192
20186