Benzopyran

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

Spiropyrans and spirooxazines 5. Synthesis of photochromic 8-(4,5-diphenyl-1,3-oxazol-2-y1)-substituted spiro[indoline-benzopyrans]

Abstract: Photochromic spiro[indoline-benzopyrans] containing 4,5-diphenyloxazolyl group at position 8 of the benzopyran fragment have been obtained. New diphenyloxazolyl-substituted spiropyrans manifest considerably higher thermal stability of the merocyanine isomers than their naphthopyran analogs.

2-(4H-1-Benzopyran-6-yl)propionic acids

Abstract: There are described compounds of formula I, ##STR1## in which Ra is hydrogen, alkyl, alkenyl or phenyl, R 3 , R 5 , R 7 and R 8 , which may be the same or different, are each hydrogen, alkyl, alkoxy, halogen, hydroxy, alkenyl or phenyl, Rx is hydrogen or alkyl, Ry and Rz are both hydrogen, or together represent a carbonyl oxygen atom, Rb and Rc are both hydrogen or together represent a carbon-carbon bond, Provided that when Rx is hydrogen, Ry and Rz together represent a carbonyl oxygen atom and R 5 , R 7 and R 8 are all hydrogen then Ra is other than methyl or phenyl, And pharmaceutically acceptable derivatives thereof. There are also described methods for making the compounds and pharmaceutical, e.g. anti-inflammatory, compositions containing the compounds.

dl-5-[(2-benzyl-3,4-dihydro-2H-benzopyran-6-yl)methyl]thiazolidine-2,4-dione as an anti-atherosclerosis agent

Abstract: This invention relates of the use of a certain thiazolidine-2,4-dione, namely, dl-5-[(2-benzyl-3,4-dihydro-2H-benzopyran-6-yl)methyl]thiazolidine-2,4-dione, or a pharmaceutically acceptable cationic salt thereof, for retarding the development of arterial disease in mammals. More specifically, it relates to a method for reducing the serum cholesterol levels in mammals by administering to said mammals dl-5-[(2-benzyl-3,4-dihydro-2H-benzopyran-6-yl)methyl]-thiazolidine-2,4-dione or a pharmaceutically acceptable cationic salt thereof.

3,4-dihydro-2h-benzopyran derivatives, a method of producing them, a method of using them as stabilizers for organic materials, and organic compositions containing such stabilizers

Abstract: There is provided a class of novel 3,4-dihydro-2H-benzopyran derivatives which either have excellent inhibitory activity against unfavorable effects of heat, light and oxidative factors or are of use as precursors of compounds having such activity, and methods for producing these derivatives. Also provided are methods of using such 3,4-dihydro-2H-benzopyran derivatives as stabilizers for organic materials sensitive to heat, light or/and oxidative factors, and organic compositions containing such stabilizers.