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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TL;DR: For example, 2.2-Benzopyran-3-one (1, X = H) undergoes strongly regioselective Diels-Alder additions to buta-1,3-diene, isobutene, but-1-ene, and the olefin (6); the adducts derived from (6) and either (1; X = OMe) or (1/X = H), or ( 1/H) or(1/H/OMe) are readily transformed into the aromatic steroids
Abstract: 2-Benzopyran-3-one (1; X = H) undergoes strongly regioselective Diels–Alder additions to buta-1,3-diene, isobutene, but-1-ene, and the olefin (6); the adducts derived from (6) and either (1; X = H) or (1; X = OMe) are readily transformed into the aromatic steroids: (9), (10), (17), (18), 9-epi-(10), 9-epi-(18), the naphthalene (14), and the dihydronaphthalene (15).
12 citations
TL;DR: In this paper, substitutions of benzopyran-4-carboxamides 5 have been synthesized and some of these compounds exhibited potent vasorelaxant activity.
12 citations
TL;DR: In this article, 2H-1-Benzopyran and derivatives have been prepared by an intramolecular Wittig reaction in a heterogeneous medium starting from salicylaldehyde, (2-hydroxyalkyl)triphenylphosphonium salts, and potassium carbonate.
Abstract: 2H-1-Benzopyran and derivatives have been prepared by an intramolecular Wittig reaction in a heterogeneous medium starting from salicylaldehyde, (2-hydroxyalkyl)triphenylphosphonium salts, and potassium carbonate. Extension of this reaction to various o-hydroxyformylpyridines were performed in order to obtain 2H-pyrano[3,2-b]pyridine, 2H-pyrano[2,3-c]pyridine, and derivatives
12 citations
Patent•
30 Apr 1992
TL;DR: In this paper, the optical isomers and their addition salts with a pharmaceutically acceptable base or acid Medicinal products are defined in terms of formula I: in which R1, R2, R3, R4, R5, R6, R7, X, and n are defined.
Abstract: Compounds of formula I: in which R1, R2, R3, R4, R5, R6, R7, X, and n are defined in the description, their optical isomers and their addition salts with a pharmaceutically acceptable base or acid Medicinal products
12 citations
Patent•
20 Mar 1997
TL;DR: The use of a benzopyran derivative for treating heart diseases such as ischemic heart disease and cardiac arrhythmia is discussed in this paper, where the authors present a safe and effective drug for heart diseases.
Abstract: The present invention offers a safe and effective drug for heart diseases and a safe and effective use of a benzopyran derivative for treating heart diseases such as ischemic heart disease and cardiac arrhythmia. The use of a benzopyran derivative comprises administering a pathologically effective amount of a benzopyran derivative expressed by the following general formula (I):
wherein R 1 is an alkyl group or an alkenyl group, R 2 is a hydrogen atom, an alkyl group, an alkyl group having at least one hydroxyl group, an alkenyl group, an acyl group or a glycosyl group; or physiologically acceptable salts thereof.
12 citations