1991
DOI: 10.1002/jhet.5570280121
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Some fatty acids having an O‐heterocycle in their terminal positions. I. ω‐(3‐Chromonyl)alkanoic acids

Abstract: Some ω‐(3‐chromonyl)alkanoic acid derivatives, 1a and 2a, n = 4, 5; 3a, 4a and 5a, n = 2‐6, were synthesized by cyclization of corresponding methyl ω‐(2‐hydroxybenzoyl)alkanoates 7b or ethyl ω‐(2,4‐dihydroxybenzoyl)alkanoates 8b with N,N‐dimethylformamide‐dimethyl acetal or acetic anhydride‐DBU followed by hydrolysis.

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Cited by 12 publications
(2 citation statements)
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“…Efforts have also been focused in the modification of electrophile, namely in the work of Yamaguchi et al that uses a stoichiometric amount of DBU instead of sodium acetate.…”
Section: Methods Of Synthesis Of Simple Chromonesmentioning
confidence: 99%
“…Efforts have also been focused in the modification of electrophile, namely in the work of Yamaguchi et al that uses a stoichiometric amount of DBU instead of sodium acetate.…”
Section: Methods Of Synthesis Of Simple Chromonesmentioning
confidence: 99%
“…In sharp contrast, Brønsted acids catalytically promote the hydrolysis of esters . Under organic/aqueous bilayer conditions, most Brønsted acid catalysts are ineffective because of their high solubility in water, while solid acids such as Amberlite or zeolite can be used as catalysts .…”
mentioning
confidence: 99%