Coumarilic Acid

Fuson, R. C.; Kneisley, J. Wayne; Kaiser, E. W.

doi:10.1002/0471264180.os024.13

Cited by 6 publications

(7 citation statements)

References 4 publications

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“…In contrast to treatment of coumarin with bromine in chloroform that results in addition at the double bond , our methods give nuclear substitution product(s). This is the first report of the preparation of 6‐bromoderivatives and 8‐bromoderivatives of coumarins via bromination of parent compounds.…”

Section: Resultsmentioning

confidence: 93%

Derivatization of Coumarins at the Benzenoid Ring in Aqueous Medium

Bhunia

Pal

Patra

et al. 2014

Journal of Heterocyclic Chem

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Some 6‐disubstituted, 8‐disubstituted, and/6,8‐disubstituted compounds have been prepared from coumarin, 7‐methylcoumarin, and 3,4‐benzocoumarin. The Reimer–Tiemann reaction, Lederer–Manasse reaction, bromination using molecular bromine as well as 2,4,4,6‐tetrabromocyclohex‐2,5‐dien‐1‐one, Elbs reaction, and diazocoupling have been carried under controlled conditions to obtain various derivatives. Further, several reactions of aldehyde derivatives of these coumarins have been carried on to prepare important functional compounds including some heterocycles. It is noteworthy that these aldehydes behave as phenolic aldehydes under alkaline conditions to undergo the Dakin reaction. The reactions are mostly carried in aqueous media involving a dianionic intermediate and hence fulfill one important criterion of green chemistry.

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Section: Resultsmentioning

confidence: 93%

Derivatization of Coumarins at the Benzenoid Ring in Aqueous Medium

Bhunia

Pal

Patra

et al. 2014

Journal of Heterocyclic Chem

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“…3‐Bromocoumarin 4 was synthesized via two‐step procedure, including bromination of coumarin to give 3,4‐dibromocoumarin and subsequent HBr elimination .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of 3-(5-Methylthiophen-2-yl)coumarins and Their Photochromic Dihetarylethene Derivatives

Bochkov

Krayushkin

Yarovenko

et al. 2013

J. Heterocyclic Chem.

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“…The acid 5 was prepared following the procedure shown in Figure 1, which has been described in the literature (Fuson et al, 1944;Witiak et al, 1971), starting with the umbeliferone 2. For this study, the esters (6a-g) for the enzymatic resolution were obtained through the reaction of 5 with the corresponding alcohols: methyl, ethyl, isopropyl, n-butyl, isobutyl, benzyl and heptyl, in the presence of p-toluenesulfonic acid.…”

Section: Resultsmentioning

confidence: 99%