Topic
Benzopyrans
About: Benzopyrans is a research topic. Over the lifetime, 694 publications have been published within this topic receiving 8830 citations.
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TL;DR: In this paper, a 1:1 mixture of cis and trans diastereomers was used to test spirocyclic benzofurans (IV, (V) and (VII) as well as corresponding benzopyrans.
Abstract: Spirocyclic benzofurans (IV), (V) and (VII) as well as the corresponding benzopyrans are produced and tested as 1:1 mixtures of cis and trans diastereomers.
TL;DR: Several aryl-1(3bromo-2-methyl-prop-2ene) ethers 2 have been prepared and their thermal rearrangements in PEG-400 in the presence of N,N-diethylaniline were found to yield the title compounds as discussed by the authors.
Abstract: Several aryl-1(3-bromo-2-methyl-prop-2-ene) ethers 2 have been prepared and their thermal rearrangements in PEG-400 in the presence of N,N-diethylaniline were found to yield the title compounds.
TL;DR: In Gegenwart von Natriumhydrid kondensieren die 2-Acetyl-3-hydroxy-dibenzopyrane (I) mit Diethylcarbonat (II) zu Benzopyrano-benzopyranen (III), die in Tabellen aufgefuhrt werden.
Abstract: In Gegenwart von Natriumhydrid kondensieren die 2-Acetyl-3-hydroxy-dibenzopyrane (I) mit Diethylcarbonat (II) zu Benzopyrano-benzopyranen (III), die in Tabellen aufgefuhrt werden.
TL;DR: The leaves of Melicope ptelefolia provided 18 2,2-dimethyl-2H-1-benzopyrans, consisting of 14 new members, including one benzodipyran and four known compounds as discussed by the authors.
Abstract: Investigation of leaves of Melicope ptelefolia afforded 18 2,2-dimethyl-2H-1-benzopyrans, consisting of 14 new members, including one benzodipyran and four known compounds. Their structures were established by mass and NMR spectroscopy, especially NOE and HMBC experiments. © 1997 Elsevier Science Ltd. All rights reserved
TL;DR: Dioxiranes are shown to be powerful and convenient oxidation agents for benzopyrans, benzothiopyrans and α, β-unsaturated ketones as discussed by the authors.
Abstract: Dioxiranes are shown to be powerful and convenient oxidation agents for benzopyrans, benzothiopyrans, and α, β-unsaturated ketones.