5-Methyl-2-furancarboxylic acid

Furancarboxylic acid, methyl ester, methyl furan-2-carhoxylate, methyl 2-furoate (611-13-2] FEMA 2703... 

Furancarboxylic acid, methyl ester methyl 2-furoate) 1884, 3266, 4249 984, 1053, 3266, 4249 ... 

Furancarboxylic acid, methyl ester methyl 2-furoate + +... 

A 50-mL stainless autoclave were charged with 328 mg methyl benzoylformate (2 mmol), 70 mg P(4-CF3C6H4)3 (0.15 mmol), 6 mL toluene, and 32 mg Ru3(CO)i2 (0.05 mmol). After the system was flushed with 10 atm ethylene three times, it was pressurized with ethylene to 3 atm and then with carbon monoxide to additional 5 atm. Then the autoclave was immersed in an oil bath at 160°C. After 20 h, it was removed from the oil bath and allowed to cool for 1 h. The gases were then released. The contents were transferred to a round-bottomed flask with toluene, and the volatiles were removed in vacuo. The residue was subjected to column chromatography on a silica gel (eluent, hexane/EtOAc, 5 1) to give 413 mg tetrahydro-5-oxo-2-phenyl-2-furancarboxylic acid methyl ester as a colorless solid, in a yield of 94%. Purification by bulb-to-bulb distillation afforded the analytically pure product, m.p. 54—56°C, Rf = 0.34 (hexane/EtOAc, 5 1). 

Furan-3-carboxylic acid, 2-methyl-methyl ester bromination, 4, 604 synthesis, 4, 686 Furancarboxylic acids acidity, 4, 71... 

After the autoclaving (100°) of D-glucose solutions, both 5-(hydroxy-methyl)-2-furoic acid and 2,5-furandicarboxylic acid were detected. No attempt was made to remove oxygen from the starting solutions. Although the D-glucose solution was not initially acidic, subsequent experience indicated that the final pH was probably 4. Air exposure (mild oxidation) of the mixtures increased the two furancarboxylic acids at the expense of 11. 

The benzene ring has been proposed as an isosteric replacement in a dipeptide to enforce either the tram l1 1 or the cis conformation 312>31 (Scheme 1). Similarly, 2-(amino-methyl)pyrrole-l-acetic acid (8, R = H) has been proposed as a cis peptide bond mimic,141 having the same number of atoms between the amino and carboxylic acid functions as in a dipeptide. Several other amino- and carboxy-substituted aromatic structures have been used as spacers in peptides 2-, 3-, and 4-aminobenzoic acids (Abz, e.g., 7), 2-, 3-, and 4-(amino-methyl)benzoic acids (Amb, e.g., 2), 2-, 3-, and 4-(aminophenyl)acetic acids (APha, e.g., 5), 2- (4), 3-, and 4-(aminomethylphenyl)acetic acid (Ampa), (aminomethyl)pyrrole-, -thiophene-, and -furancarboxylic acids 6, (aminomethyl)pyrrole- 8 and -thienylacetic acids, and aminobiphenylcarboxylic acids. 

FUROIC ACID, METHYL ESTER METHYL 2-FURANCARBOXYLATE METHYL 2-FUROATE METHYL PYROMUCATE PYROMUCIC ACID METHYL ESTER... 

C6H6CINO 3-amino-6-chlorophenol 6358-06-1 458.65 39.926 2 7094 C6H603 5-methyl-2-furancarboxylic acid 1917-15-3 491.40 43.058 2... 

C6H6CIN302 4-amino-3-nitro 6 chloroaniline 26196-45-2 480.65 42.028 1,2 7095 C6H603 5-methyl-3-furancarboxylic acid 21984-93-0 491.40 43.058 2... 

C7H803 2-furancarboxylic acid, 5-methyl-, methyl es 2527-96-0 474.75 41.463 2 11018 C7H9N03S 6-amino-m-totuenesulfonic acid 88-44-8 773.15 70.660 2... 

In a detailed study on methylated permanganate-degradation products of aquatic humic and fulvic acids (originating from Black Lake, North Carolina, and Lake Drummont, Virginia) by means of gas chromatography/mass spectrometry, Liao et al. (1982) found methyl esters of benzenecarboxylic acids, furancarboxylic acids, aliphatic mono, di, and tribasic acids, and (car-boxyphenyl) glyoxylic acids (Table 3). The degradation products of fulvic and humic fractions from the two lakes were qualitatively similar, but dis-... 

Ethyl 2-methyl-5-phenyl-3-furancarboxylate 3-Furoic acid, 2-methyl-5-phenyl-, ethyl ester (8) 3-Furancarboxylic acid, 2-methyl-5-phenyl-, ethyl ester (9) (29113-64-2)... 

Furancarboxylic acid, 5-methyl-, methyl ester, methyl 5-methyIfuran-2-carboxylate, methyl 5-methyl-2-furoate [2527-96-0]... 

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