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Furan-carboxylic acids, methylation

H NMR, 4, 561 <65MI31002> Benzo[b]furan-2-carboxylic acid, methyl ester UV, 4, 589 Benzo[b]furan-3-carboxylic acid, 6-chloro-4,5,7-trifluoro-2-methyl-, ethyl ester C NMR, 4, 568 <72JCS(P2)1733> Benzo[b]furan-3-carboxylic acid, 6-cyano-4,5,7-trifluoro-2-methyl-, ethyl ester C NMR, 4, 568 <72JCS(P2)1733>, 569 <72JCS(P2)1733>... [Pg.8]

H NMR, 4, 561 <720MR(4)343> Benzo[b]furan-4-carboxylic acid, methyl ester UV, 4, 589 (73AJC1059)... [Pg.8]

Furan-2-carboxylic acid, methyl ester C NMR, 4, 565, 566, 567 (75CS(7)211)... [Pg.24]

Benzo[b]furan-3-carboxylic acids methyl esters, 4, 646 Benzofuranofurans H NMR, 4, 572 5-Benzo[ b]furanol esters... [Pg.548]

Using these assumptions and conventions, Imoto and co-workers have correlated a number of series of reactions of thiophenes and furans. The reactions studied are the acid-base equilibria pK values) and the acid catalyzed methylations (thiophenes only) of thiophene-and furan-carboxylic acids and the alkaline hydrolyses of their ethyl esters the side-chain bromination of the a-acetylthiophenes, and the a-mercuration of thiophenes and the polarographic half-wave potentials of the methyl esters of thiophene- and furan-carboxylic acids and of nitrothiophenes. The pK values were determined and the ester hydrolyses studied for all three substitution orientations in the thiophene series. For the 4-R-2-Y and 5-R-2-Y series, the p-values do not appear significantly different and the data could probably be combined into a single series unfortunately, however, no limits of accuracy are reported for the p-values, and some of the raw data are not readily available so recalculation is not easily possible. For the 5-R-3-Y series the p-values deviate considerably from the other values however, whereas they are higher for the pK values, they are lower for the ester hydrolyses, and it is possible that the differences are neither systematic nor significant. [Pg.239]

Furan-3-carboxylic acid, 4-methyl- H NMR, 4, 558, 559 (61CJC905) Furan-3-carboxylic acid, methyl ester 13C NMR, 4, 566 <75CS(7)211>... [Pg.24]

N-Methyl formyl 2.6 difluoro benzamide lufenuron 2 Methyl furan carboxylic acid fenfuram... [Pg.1042]

The isomeric Step 4 ester, 5-(4-fluorophenyl)-4-(4-(methylthio)-phenyl)thiophene-2-carboxylic acid methyl ester, (I), has been prepared (3). The Step 5 furan derivative, (II), 3-(4-fluorophenyl)-4-(4-(methyl-sulfonyl)phenyl)furan has also been prepared and is described (3). [Pg.653]

SYNS FURAN-o-CARBOXYLIC ACID METHYL ESTER... [Pg.926]

FURANALDEHYDE see FPQ875 2-FURANCARBINOL see FPUOOO 2-FURANCARBONAL see FPQ875 2-FURANCARBOXALDEHYDE see FPQ875 FURAN-a-CARBOXYLIC ACID METHYL ESTER see MKH600... [Pg.1701]

Synonyms Furan-a-carboxylic acid methyl ester 2-Furoic acid, methyl ester Methyl 2-furancarboxylate Methyl furoate Methyl pyromucate... [Pg.2633]

An aq. soln. of KOH added in one portion at room temp, to a suspension of 2,5-dihydro-2-oxo-N-phenyl-4-[(N-phenyl-N-methyl)amino]-3-furancarboxamide in ethanol, and heated under reflux for 2 h 4,5-dihydro-4-oxo-2-phenylamino-3-furan-carboxylic acid. Y 77%. Reverse reaction s. Synth. Meth. 42, 348. F.e.s. R.A. Mack et al., Helv. Chim. Acta 71, 783-7 (1988). [Pg.53]

Using these assumptions and conventions, Imoto and co-workers have correlated a number of series of reactions of thiophenes and furans. The reactions studied are the acid-base equilibria values) and the acid catalyzed methylations (thiophenes only) of thiophene-and furan-carboxylic acids and the alkaline hydrolyses of their ethyl esters the side-chain bromination of the a-acetylthiophenes, and the a-mercuration of thiophenes and the polarographic half-wave potentials of the methyl esters of thiophene- and furan-carboxylic acids and of nitrothiophenes. The values were determined and the... [Pg.341]

Gopichand et al. (407) isolated two new acyclic sesquiterpene hydrocarbons (483) and (484) from the gorgonian Plexaurella grisea as well as (-h)-a-santalene (485), which is well-known from terrestrial source. Bowden et al. (408) described new sesquiterpene furans from Sinularia capillosa and S.firma, all of which were structurally related. The furanoquinol (486) was the predominant isolate and was accompanied by the related furanoquinone (487) which may be an artifact. In addition they found the methylfurans (488-492), the furan methyl esters (493-496), and the furan carboxylic acids (497-500). A related methylfuran (501) has been obtained from the Mediterranean alcyona-cean, Alcyonum palmatum (409). [Pg.223]

CsHgOs furan-3-carboxylic acid methyl ester 13129-23-2... [Pg.133]

CsHgOs furan-2-carboxylic acid methyl ester 611-13-2 ... [Pg.134]

Methyl-5-aminothia2ole-4-carboxylic acid is diazotized with isoamyl nitrite in the presence of furan in 1.2-dichloroethane to give a mixture of products 163 (53%), 164 (33%). 165 (11%), and 166 (3%) (Scheme 104) (334). This reactivity experiment was carried out to examine the possibility of the occurrence of 4,5-dehydrothiazole (hetaryne). Hetaryne intermediates seem not to be involved as an intermediate in the reaction. The formation of 163 through 166 can be rationalized in terms of the intermediacy of 166a. [Pg.67]

Benzo[b]furan-2-carboxylic acid, 3,6-dimethoxy-, methyl ester UV, 4, 589 <71AJC1883> Benzo[b]furan-2-carboxylic acid, 5,6-dimethyl-, methyl ester... [Pg.8]

F NMR, 4, 569 <72JCS(P2)1733> Benzo[b]furan-3-carboxylic acid, 2-methyl-, methyl ester... [Pg.8]

Benzo[b]furan-2-carboxylic acids bromination, 4, 602 chloromethylation, 4, 602 from coumarins, 3, 686 IR spectra, 4, 590 methyl ester... [Pg.548]

Furan-2-carbonyl chloride, 5-alkyl-3,4-dichloro-synthesis, 4, 690 Furancarboxamides rotational isomerism, 4, 543 Furan-2-carboxylic acid, 5-acetylamino-ethyl ester reactions, 4, 647 Furan-2-carboxylic acid, amino-properties, 4, 708 Furan-2-carboxylic acid, 5-bromo-nitration, 4, 603, 711 Furan-2-carboxylic acid, 3-methyl-methyl ester bromination, 4, 604 Furan-2-carboxylic acid, 5-methyl-nitration, 4, 602... [Pg.632]

Furan-3-carboxylic acid, 2-methoxy-4-methyl-methyl ester synthesis, 4, 686... [Pg.632]

See other pages where Furan-carboxylic acids, methylation is mentioned: [Pg.213]    [Pg.213]    [Pg.1199]    [Pg.449]    [Pg.460]    [Pg.1077]    [Pg.1077]    [Pg.24]    [Pg.632]    [Pg.161]   
See also in sourсe #XX -- [ Pg.239 ]



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2 - -furan-2-carboxylic

Carboxylic acids methylation

Furan-2-carboxylic acid

Furan-3-carboxylate

Methyl carboxylate

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