Oxoacetic acid

CH4N2 463-52-5) see Itraconazole formamidine hydrochloride (CH5QN2 6313-33-3) sec Allopurinol 7-formamidocephalosporanic acid (CiiHj2N20fiS 27267-35-2) see Cefamandole 2-(2-formamido-4-thiazolyl)-2-methoxyiminoacetic acid (C7H7N3O4S 83594-38-1) see Ceftizoxime (2-formamidothiazol-4-yl)oxoacetic acid (CfiH4N204S 64987-06-0) see Cetixime formic acid... 

The following analytical standards were synthesized by Monsanto Company and may be available through the Environmental Protection Agency, National Pesticide Standard Repository (Fort Meade, MD, USA) [l-(methylethyl)phenylamino] oxoacetic acid, sodium salt, >95% pure (NIPA-producing metabolite) and N-isopropylaniline (NIPA), >99% pure. 

The established procedure for the synthesis of the fused pyrazine ring involves condensation of the oxadiazole diamine with 1,2-dicarbonyl compounds <1978JOC341>. The latter procedure was used by Beebe et al. to make a series of [l,2,5]oxadiazolo[3,4-/ ]pyrazines for evaluation as antibacterial agents <2003BML3133>. An example is shown in Scheme 52, which involved heating the diamine with (3-bromophenyl)oxoacetic acid in glacial acetic acid at 110°C to give the [l,2,5]oxadiazolo[3,4- ]pyrazine. 

Oxiranemethanol nitrate, see 2,3-Epoxypropyl nitrate, 1182 Oxiranemethanol, see 2,3-Epoxypropanol, 1225 Oxoacetic acid, see Glyoxylic acid, 0720 Oxobis[aqua(oxo)diperoxorheniumVII], 4532 /(-Oxo-/,/-bis(trifhioroacetato-<9)-/,/-diphenyldiodine(III), 3691 Oxodiperoxodipiperidinechromium(VI), 3361 Oxodiperoxodipyridinechromium(VI), 3268 Oxodiperoxodi(pyridine /V-ox ide)mol ybdenu m, 3273 Oxodiperoxodi(pyridine /V-oxide)tungsten, 3277 Oxodiperoxodiquinolinechromium( VI), 3742 Oxodiperoxomolybdenum—hexamethylphosphoramide, 4713 Oxodiperoxopyridinechromium V-oxide, 1838... 

Glyoxylic acid (= Oxoacetic acid) (carboxylic acid) Universal unripe fruit, young leaf Beta vulgaris (young sugar beet) (Chenopodiaceae), Ribes uva-crispa (Grossulariaceae) [fruit] Sour (acid) taste [irritant]... 

Dicarbonyl compounds can be cleaved oxidatively using peracids this protocol has been used to prepare cyclopropanecarboxylic acids from a dicyclopropylethanedione, e.g. 2 from 1 and several 2-cyclopropyl-2-oxoacetic acids. " An appropriately substituted 1,3-diketone has also been converted to a cyclopropanecarboxylic acid by basic hydrolysis. When a hydroxy group is attached p to the carbonyl group of an alkyl cyclopropyl ketone, periodate oxidation afforded a similar acid in quantitative yield. ... 

In a similar way, hydrazones of (2-carboxy-3-pyridyl)oxoacetic acid are cyclized either thermally or by acid catalysis to 4b,c.38... 

Furthermore reaction of 62 with 331 and ultraviolet light gave the same products 332 and 333 but in 17 and 40% yield, respectively (Scheme 104). On the other hand, reaction of 62 and 334 gave also the same product 335, in 14% yield together with [indol-3-ylideneamino)-5-fluorophenyl]oxoacetic acid 338 in 37% yield. 

The presence of acetic acid, oxo-, oxoacetic acid, glyoxylic acid, glyoxalic acid (298-12-4] in roasted coffee has been suggested by Van der Stegen and Van Duijn (1988). 

CAS 298-12-4 EINECS/ELINCS 206-058-5 Synonyms Acetic acid, oxo- Formylformic acid Glyoxalate Glyoxylate a-Ketoacetic acid Oxaldehydic acid Oxoacetic acid Oxoethanoic acid... 

Oxirane, phenyl-. See Styrene oxide Oxirane, (trichloromethyl)-. See 1,2-Epoxy-3,3,3-trichloropropane Oxirane, trifluoro (trifluoromethyl)-. See 1,2-Epoxy-1,1,2,3,3,3-hexafluoropropane Oxirene, 2,2,2-trichloroethyl-. See Trichlorobutylene oxide Oxitol. See Ethoxyethanol Oxoacetic acid. See Glyoxalic acid 5-Oxobarbituric acid monohydrate. See Alloxan monohydrate... 

Oxoacetic acid, 9CI. Glyoxalic acid. Aldehydoformic acid. Formylformic acid. Oxalaldehydic acid [298-12-4]... 

The aldehyde component has also been replaced by diethyl formylphosphonate hydrate in the silver-catalyzed synthesis of V-PMP-protected a-aminopropargylphospho-nates [139] and by 2-oxoacetic acid [140] or glyoxylic acid [141] in copper-catalyzed microwave-assisted decarboxyla-tive three-component couplings. In addition, glyoxylic acid has been coupled with amines and alkynes in the gold-catalyzed synthesis of butenolides (see Scheme 3.48) [121]. 

H. Feng, D. S. Ermolat ev, G. Song, E. V. Van der Eycken, J. Org. Chem. 2011, 76, 7608—7613. Microwave-assisted decarboxylative three-component couphng of a 2-oxoacetic acid, an amine, and an alkyne. 

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