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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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Abstract: An efficient and practical method for effecting a tandem C-H alkenylation/C-O cyclization has been achieved via the C-H functionalization of flavone derivatives. The synthetic utility of the one-pot sequence was demonstrated by obtaining convenient access to coumarin-annelated benzopyrans. The reaction scope for the transformation was found to be fairly broad, affording good yields of a wide range of flavone- or coumarin-fused benzopyran motifs, which are privileged structures in many biologically active compounds.
Patent•
30 Aug 2006TL;DR: In this article, the present invention is directed to novel benzopyran derivatives, pharmaceutical compositions containing them and their use in the treatment of disorders related to the potassium channel and their application in medical applications.
Abstract: The present invention is directed to novel benzopyran derivatives, pharmaceutical compositions containing them and their use in the treatment of disorders related to potassium channel.
TL;DR: The pyran ring of C21H15BrO has a half-chair conformation as discussed by the authors, similar to that of the benzopyran fragment in the title compound.
Abstract: 2H-Benzopyrans (chromenes) and their analogues are the subject of considerable current interest due to their highly desirable photochromic properties. Although the benzopyran fragment in the title compound, C21H15BrO, is roughly planar, the pyran ring may be regarded as having a half-chair conformation.