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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Patent•
21 Feb 1994TL;DR: In this paper, a method for safening herbicides in crop plants by using substituted benzopyran or tetrahydronaphthalene compounds of formula I was provided.
Abstract: There is provided a method for safening herbicides in crop plants by using substituted benzopyran or tetrahydronaphthalene compounds of formula I ##STR1## Further provided are compounds of formula II and compositions comprising a herbicide and an antidotally effective amount of a substituted benzopyran or tetrahydronaphthalene compound of formula I.
52 citations
TL;DR: 2-imino/oxo-2H-1-benzopyran-3-carboxamides 3a and b and 4a-h were further studied at graded doses for their acute toxicity in albino mice and were essentially non-toxic at the highest dose tested.
52 citations
TL;DR: The syntheses of trans-3-(4-oxo-4H-1-benzypyran-3)acrylic acid and a number of analogs shown to be highly active in antiallergic bioassays are described and are of possible value in the treatment of asthma.
Abstract: The syntheses of trans-3-(4-oxo-4H-1-benzypyran-3)acrylic acid and a number of analogs shown to be highly active in antiallergic bioassays are described. These compounds are of possible value in the treatment of asthma. The structural requirements for biological activity are discussed with reference to the type of the substituents on the chromone ring or positions of linkage of the acrylic acid on the pyrone ring.
50 citations
Patent•
19 Jul 1991TL;DR: In this article, a series of novel photochromic benzopyran and naphthopyrin compounds substituted with (1) a cyclopropyl group and (2) a phenyl, substituted phenyl or 5-member aromatic heterocyclic group at the 2-position of the benzophyran ring were described.
Abstract: Described are a series of novel photochromic benzopyran and naphthopyran compounds substituted with (1) a cyclopropyl group and (2) a phenyl, substituted phenyl, or 5-member aromatic heterocyclic group at the 2-position of the benzopyran or naphthopyran ring. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic or plano lenses that incorporate the novel pyran compounds or combinations of the novel pyran compounds with other complementary photochromic compounds are described.
50 citations
TL;DR: Evaluating whether the insertion of an electron-rich spirocyclic substituent at the C4 carbon of the benzopyran molecular nucleus may improve the cardioprotective properties against ischemia found some new compounds exhibited interesting anti-ischemic properties.
Abstract: This study was aimed at evaluating, on a limited number of benzopyran compounds, whether the insertion of an electron-rich spirocyclic substituent at the C4 carbon of the benzopyran molecular nucleus may improve the cardioprotective properties against ischemia. Some of the new compounds (1b, 2b, and 4b) exhibited interesting anti-ischemic properties without affecting significantly the blood pressure parameters.
49 citations