P-Anisidine reagent

Figure 3. Possible reactions between p-anisidine reagent and malonaldehyde.

The extent of oxidation in fats and oils can be determined by the measurement of the formation of carbonyl compounds. The para-anisidine test determines the amount of aldehydes (principally 2-alkenals and 2,4-alkadienals) in vegetable and animal fats. Aldehydes in oil react with the p-anisidine reagent under acidic conditions to give yellowish products that absorb at... 

AnV measures the level of carbonyl compounds, particularly aldehydes, in a fat (lUPAC method 2.504). The fat, in 2,2,4-trimethylpentane solution, is treated with p-anisidine reagent prepared with anhydrous acetic acid. The level of reaction products is determined spectrophotometrically at 350 nm. The reagent is particularly toxic and skin contact must be... 

In long-wavelength UV light (2 = 365 nm) carbohydrates, e.g. glucose, fructose and lactose, yield pale blue fluorescent derivatives on a weakly fluorescent background. In situ quantitation can be performed at = 365 nm and 2fi = 546 nm (monochromatic filter M 546) [19]. Further differentiation can be achieved by spraying afterwards with p-anisidine-phosphoric acid reagent [8]. 

The following examples of reagent sequences, which include the reagent Ammonium monovanadate — p-anisidine described in the second part of the book can also be classified as redox reactions. 

The quinoline portion of the target alkaloids was prepared by condensing p-anisidine 9 with ethyl propiolate, followed by bromination. Coupling of 10 with the boronic ester 8 proceeded to give 11, the intermediate for the synthesis of both 1 and 2. Selective direct epoxidation of 11 using the usual reagents failed, but Sharpless asymmetric dihydroxylation was successful, providing the diol in > 96 4... 

Maggi, R. Schlosser, M. Optional site selectivity in the metalation of o- and p-anisidine through matching of reagents with neighboring groups. /. Org. Chem. 1996, 61, 5430- 442 5434. 

Hough and coworkers62 made a study of a variety of amine reagents. p-Anisidine hydrochloride (or phosphate)90 is a general reagent for dis-... 

Many color reagents are applicable to the oligosaccharides. Some of those used are ammoniacal silver nitrate,60 resorcinol-hydrochloric acid for inulin hydrolyzates,137 acidic benzidine for maltodextrins,138 Bromo-phenol Blue or p-anisidine-hydrochloric acid for galactosiduronic acids,130 and alkaline copper reagent with phosphomolybdic acid for dextrins.71... 

Spray Reagent Dissolve 1.23 g of p-anisidine and 1.66 g of phthalic acid in 100 mL of methanol. Store the solution in darkness, and refrigerate to prevent discoloration. Discard if the solution becomes discolored. 

In 2009, Xiao employed a half sandwich Cp lr(l 11) complex with different chiral monosulfonated OPEN ligands (Figure 7.2), earlier developed for imine reduction by the same group, in combination with a BINOL based chiral phosphate counteranion (TRIP anion), to reductively aminate 24 acetophenone derivatives (1.2 equiv) with p anisidine (limiting reagent) under the conditions of 1.0 mol% of the indicated Ir catalyst (Table 7.1), 5 bar (73 psi) H2, toluene, 35 °C, and 15 24h [14]. 

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