By sodium dichromate

A hydroxyl group in the neighborhood of fluoroalkyl is oxidized by sodium dichromate to yield a ketone [481 (equation 44)... 

The synthesis of fluoroalkyl and chloroalkyl fluoromethyl ketones is achieved by oxidation of the corresponding alcohols by sodium dichromate and sulfunc acid in methylene chlonde in the presence of a phase transfer catalyst [49] (equation 45)... 

Write the structural formula for the product of (a) the reaction of glycerol (1,2,3-trihydroxypropane) with stearic acid, CH5(CH2)16COOH, to produce a saturated fat (b) the oxidation of 4-hydroxybenzyl alcohol by sodium dichromate in an acidic organic solvent. 

Caffeine Xanthine derivatives Purines Purines, pyrimidines Purines Chloraminc-T Iron (111) chloride followed by iodine Silver nitrate followed by sodium dichromate Fluorescein Silver nitrate followed by bromophenol blue... 

Acridine is readily oxidized to acridone by sodium dichromate and acetic acid. Pyridin-2-one and nicotinic acid have been found to undergo oxidation to oxalic add on treatment with Fenton s reagent (69CHE563). 

CHPh2, R" = H), which was oxidized by sodium dichromate-acetic acid to V-(diphenylmethyl)isatin.510... 

Toluene and its substituted derivatives are oxidized by sodium dichromate or chromyl chloride mainly into the corresponding benzoic acids or benzaldehydes in good yields.270 No or very little ring hydroxylation is observed. 

Suppose you have just synthesized heptanoic acid from heptan- l-ol. The product is contaminated by sodium dichromate, sulfuric acid, heptan- l-ol, and possibly heptanal. Explain how you would use acid-base extractions to purify the heptanoic acid. Use a chart, like that in Figure 20-3, to show where the impurities are at each stage. 

Oxidation—Continued by fuming nitric acid, 23, 3 by hydrogen peroxide, 20, 70 by nitric acid, 27, 84 by potassium chlorate, 23, 6 by potassium permanganate, 20, 79 by sodium dichromate and sulfuric acid, 25, 81... 

A rearrangement of strychnine-IV-oxide catalyzed by sodium dichromate in boiling water gives almost quantitative conversion into two products in equal amounts one of these is pseudostrychnine (XXV) and the other is 18-oxostrychnine. It is interesting that no product corresponding to oxidation of C-20 seems to be formed (143a, 127). 

Tertiary alcohols aren t oxidized by sodium dichromate. 

In acenaphthene, both methylene groups are oxidized by sodium dichromate to give acenaphthenequinone (equation 180) [625]. 

If the person fails this test—determined by the extent to which the green color spreads through the tube—a more accurate Breathalyzer test is administered. The Breathalyzer test also depends on the oxidation of breath ethanol by sodium dichromate, but it provides more accurate results because it is quantitative. In the test, a known volume of breath is bubbled through an acidic solution of sodium dichromate, and the concentration of chromic ion is measured precisely with a spectrophotometer. 

Hodges NJ, Adam B, Lee AJ, Cross HJ and Chipman JK (2001) Induction of DNA-strand breaks in human peripheral blood lymphocytes and A549 Lung cells by sodium dichromate association with 8-0X0-2-deoxyguanosine formation and interindividual variability. Mutagen 16 467-474. 

Eq. (a) shows the oxidation ofp-nitrotoluene by sodium dichromate in an acidic medium (with H2S0 ) to yield p-nitro benzoic acid (I) whereby the methyl function in the starting material gets oxidized to the corresponding carboxylic moiety due to the evolution of 3-moles of nescent oxygen as given in Eq. (a) iii). 

Secondary alcohols are readily oxidized to ketones by sodium dichromate in sulfuric acid ( chromic acid ) or by potassium permanganate (KMn04). Primary alcohols are usually over-oxidized to carboxylic acids under these conditions. 

According to a recent paper 250 cf. 251),. V,0-diacetylsolasodine (227) was oxidized by sodium dichromate in aqueous acetic acid to the diketone 228, which could be transformed by Grignard addition and treatment with HCl into the 16-alkyl-substituted furostadiene derivative 229. 

When phenanthrene is oxidised by sodium dichromate or chromium trioxide in glacial acetic acid, phenanthraquinone (9, 10 - dihydroxyphenanthiene) is obtained. 

Q11 The oxidation of propan-2-ol, CH3CH(OH)CH3, by sodium dichromate(vi) leads to the formation of ... 

Suitable mechanisms have been proposed following determination of the kinetic and activation parameters for oxidation of 2-naphthol and cyclic ketones by nicotinium dichromate some a-amino acids by tripropylammonium fluorochromate " distyryl ketone by quinaldinium fluorochromate methanol by benzyltriethylammonium chlorochromate catalysed by 1,10-phenanthroline substituted benzyl alcohols by tetraethylammonium bromochromate L-cysteine by pyridinium bromochromate lactic acid and 3,5-dimethyl-2,6-diaryl piperidin-4-one oximes by pyridinium chlorochromate allyl alcohol by IDC benzophenoxime by bispyridine silver(I) dichromate and alkyl phenyl sulfides by cetyltrimethylammonium dichromate. A non-linear Hammett plot obtained for the oxidation of substituted benzyl alcohols by IDC has been attributed to the operation of substituent effect on two steps of the proposed mechanism. " Kinetic and activation parameters for oxidation of o-toluidine and of A-methyl-2,6-diphenyl piperidin-4-one oxime and its 3-alkyl derivatives by sodium dichromate have been determined and suitable mechanisms have been suggested. Micellar catalysis in the 1,10-phenanthroline-promoted chromic acid oxidation of propanol... 

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