Aniline as reagent

Aniline as reagent 16, 171, 297 Anils s. Azomethines Anion exchange resins (s. a. 

Both dimethyl carbonate [616-38-6] and diphenyl carbonate [102-09-0] have been used, in place of carbon monoxide, as reagents for the conversion of amines into isocyanates via this route (28,29). Alternatively, aniline [62-53-3] toluene diamines (I JJA), and methylene dianilines (MDA) have also been used as starting materials in the carbonylations to provide a wide variety of isocyanate monomers. 

Allyltantalum-mediated allylation of aldimines was reported by Bhuyan et al. in 1993 these workers compared tantalum and bismuth organometallic reagents over a series of transformations. Up to 60% yield was obtained for tantalum-mediated allylation (benzylidene aniline as electrophile). Bismuth reagents offered better yields in the cases compared but, in all cases, a remarkable effect for the addition of Bu NBr was observed.186... 

Hall et al. [139] produced a low-molar-mass series of polyarylamine dendrimers by using a protection/deprotection scheme involving the protected, branch cell reagent 2,4-dinitrofluorobenzene. Using various anilines as initiator cores, the... 

One-pot diazotization/fluorodediazoniation of aniline derivatives has been reported using potassium fluoride-hydrogen fluoride salts, in various stoichiometric amounts, as reagents together with iert-butyl nitrite (TBN) or sodium nitrite (Table 6). The best result is obtained when 6 mmol of potassium hydrogen fluoride (KHF ) and 4 mmol of silicon tetrafluoride are used with 1 mmol of aniline (entry 3). 

Polymer-supported sulfonyl chlorides can be used for the selective monosulfonyl-ation of anilines, as demonstrated by the Ley group [71, 72], Commercially available polystyrene-DMAP (4-dimethylaminopyridine) was treated with different aryl sulfonyl chlorides to form polymer-bound sulfonylation reagents. These were reacted with substituted anilines to form an array of hydroxamic acids (Scheme 6.17), using a synthetic strategy involving polymer-bound reagents in all steps. The products were subsequently evaluated as histone deacetylase inhibitors. 

Other reactions. The deoxygenation of bis(tributyltin)oxide to afford hexabutylditin in EtOH, 2h, 83% yield) and the conversion of Af-alkenylpyridinium salts to ketones are accomplished using NaBH as reagent. Anilines are obtained by reduction of nitroarenes u ith NaBH -fNH l SO. ... 

Kappelmeier [35] has suggested the use of aniline, benzylamine, and phenyl-ethyl-amine as reagents for the identification and analysis of urea in UF resins. He has provided evidence that the methylene-ether groups form a bridge between urea residues in UF resins. The use of benzylamine in particular (which yields dibenzylurea from urea derivatives), has been developed as a method of analysis. In determining the ratio of urea to formaldehyde in UF resins, the benzylamine method has been coupled with a process of formaldehyde estimation which involves depolymerization with phosphoric acid, followed by distillation into alkaline potassium cyanide solution [36]. 

Finally, show all reagents. Draw the substituted aniline as the reactant, and then show the two steps necessary to convert this compound into the desired product. The first step utilizes NaN02 and HCI to produce the diazonium salt, and the second step utilizes an azo coupling reaction ... 

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