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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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Journal ArticleDOI
TL;DR: In this paper, the benzopyran ring system is planar and the piperazine ring adopts an almost perfect chair conformation, and the methoxy group is coplanar with its parent benzene ring.
Abstract: In the title compound, C 23 H 26 N 2 O A ·H 2 O, the benzopyran ring system is planar. The piperazine ring adopts an almost perfect chair conformation, and the methoxy group is coplanar with its parent benzene ring. Hydrogen bonds link two water molecules and two piperazine molecules into tetrameric units. The adjacent benzopyran moieties within these units also interact via π-π stacking interactions, and a sheet is formed by the propagation of these interactions. The bioassay results have shown α 1 -adrenoceptor antagonistic activity through in vitro animal experiments.
Journal ArticleDOI
TL;DR: The Cu(I)-catalyzed cycloaddition of ortho-propynyloxybenzaldehydes (I) with pyranone (II) constitutes an efficient synthesis of the title compounds (III) as mentioned in this paper.
Abstract: The Cu(I)-catalyzed cycloaddition of ortho-propynyloxybenzaldehydes (I) with the pyranone (II) constitutes an efficient synthesis of the title compounds (III).
Journal ArticleDOI
TL;DR: In the title compound, C18H16O6, the dimethoxyphenyl ring is rotated by 61.8 (1)° from the plane of the benzopyran system and stabilized by an intramolecular O—H⋯O hydrogen bond.
Abstract: In the title compound, C18H16O6, the dimethoxy­phenyl ring is rotated by 61.8 (1)° from the plane of the benzopyran system. The mol­ecule is stabilized by an intra­molecular O—H⋯O hydrogen bond.

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20234
202220
202114
20209
201925
201814