Showing papers on "Benzopyrans published in 1985"

4-Chlorooctahydro-2H-1-benzopyrans and 4-chloro-4a,5,6,7,8,8a-hexahydro-2H-1-benzopyrans via the Lewis acid promoted cyclization of acetals derived from trans-2-vinylcyclohexanol and trans-2-ethynylcyclohexanol: synthesis, structure, and mechanism

Abstract: Synthese des composes du titre et de leurs derives methyl-2 a partir des vinyl-2- et ethynyl-2 cyclohexanols et des chloromethyl methyl ether ou ethyl vinyl ether via la cyclisation en presence de TiCl 4 des [methoxy-2' ethyl (ou ethyl) R] acetals des formaldehyde et acetaldehyde (R=vinyl ou ethynyl-2 cyclohexyl)

Vorkommen und biologische Bedeutung von Benzopyranen (Chromenen) und Benzofuranen in denAsteraceae

Abstract: Benzopyrans (chromenes) and benzofurans are characteristic natural products of theAsteraceae and are found together with their biogenetic precursors primarily in the tribesAnthemideae, Astereae, Eupatorieae, Heliantheae, Inuleae, andSenecioneae. The accumulation of benzopyrans and benzofurans supports an arrangement of the tribes of theAsteraceae into two groups as suggested recently based on morphological characters. The methods for analysing this class of natural products are demonstrated with the American genusEncelia. Experiments on the localization of benzopyrans and benzofurans inEncelia species indicate that these compounds are stored in resin ducts. Several benzopyrans and benzofurans are biologically active and are repellent as well as toxic towards herbivorous insects. Experiments on structure — activity relationships indicate the biological activities as being influenced by the heterocycle (pyranvs. furan) as well as by the substituents of the aromatic ring. In addition, several tested compounds showed phototoxic activities.

Circulation active novel substituted 4-hydroxy-benzopyrans

Abstract: Novel substituted 4-hydroxy-benzopyrans of the formula ##STR1## in which X is a single bond, ##STR2## and the other radicals can have various meanings, or pharmaceutically acceptable addition salts thereof, which are active on the circulation system.

Substituted aminomethyl benzopyrans having anti-hypertensive activities

Abstract: Substituted benzopyrans of the formula ##STR1## in which --A-- is a single or double bond, X is a direct bond, optionally substituted methylene, oxygen or optionally substituted --NH--, and the various other radicals can have various meanings, or pharmaceutically acceptable addition salts thereof, which possess anti-hypertensive activity.

Quinoline derivatives and their use as anti-asthmatic agents

Abstract: There are provided benzopyrans of formula I, ##STR1## wherein the substituents, R5 -R8 and EA are as defined in the specification. These compounds are useful as anti-asthmatic agents.

Substituted benzopyrans, process for their preparation and their use in medicines

Abstract: Die vorliegende Erfindung betrifft substituierte Benzopy- rane der Formel I The present invention relates to substituted Benzopy- rane of the formula I in welcher A, R 1 bis R 16 und X die in der Beschreibung angegebene Bedeutung haben, mehrere Verfahren zu ihrer Herstellung sowie ihre Verwendung in Arzneimitteln, insbesondere in kreislaufbeeinflussenden Mitteln. in which A, R 1 to R 16 and X have the meanings given in the description, to several processes for their preparation and their use in medicaments, especially in circulation-influencing agents.

Benzopyrane derivatives, manufacture and composition

Abstract: There are provided benzopyrans of formula I, wherein the substituents, R5-R8 and EA are as defined in the specification. These compounds are useful as anti-asthmatic agents.

Substituted benzopyranes, manufacture and use

Abstract: Substituted benzopyrans of the formula in which -A- is a single or double bond, X is a direct bond, optionally substituted methylene, oxygen or optionally substituted -NH-, and the various other radicals can have various meanings, or pharmaceutically acceptable addition salts thereof, which possess anti-hypertensive activity.