Benzopyran

About: Benzopyran is a research topic. Over the lifetime, 1889 publications have been published within this topic receiving 15235 citations.

4-Substituted benzopyran and related compounds useful as pharmaceutical agents

Abstract: Compounds having the formula and pharmaceutically acceptable salts thereof wherein a, b, d, A and R¹ to R⁹ are as defined herein. These compounds have potassium channel activating activity and are useful, therefore for example, as cardiovascular agents.

Copper ion fluorescence probe based on benzopyran diketone and preparation method of copper iron fluorescence probe

Abstract: The invention relates to a fluorescence probe and particularly relates to a copper ion fluorescence probe based on benzopyran diketone and a preparation method of the copper iron fluorescence probe. The preparation method of the copper ion fluorescence probe based on benzopyran diketone comprises the following steps: (1) carrying out acetylation on 4-hydroxyl coumarin in glacial acetic acid to obtain an intermediate A; and (2) enabling R-CHO, the intermediate A and pyrrolidine to react in an organic solvent to obtain the copper ion fluorescence probe based on benzopyran diketone compounds. The copper ion fluorescence probe based on benzopyran diketone disclosed by the invention is structurally different from the benzopyran diketone, and has very good response on copper ions.

Oxygen Heterocycles by Sulphur Ylide Annulation: Synthesis of 3,4-Dihydro-2H,5H-pyrano[3,2-c][1]benzopyran-5-ones by Dimethylsulphoxonium Methylide

Abstract: Les derives hydroxymethyl-2 des composes du titre sont les produits principaux de la reaction du S,S-dimethyl sulfoxoniomethanure sur les adduits de Michael d'hydroxy-4 coumarines et d'enones (dihydro-3,4 hydroxy-2 2,5H-pyranno [3,2-c] benzopyranne-1ones-5); obtention egalement de quantites mineures d'hydroxymethyl-2 tetrahydro-2,3,4,5 pyranno [2,3-b] benzopyranne-1ones-5