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, 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.
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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).
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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.