Hydrolysis of 2-phenylbenzoxazole and o-benzamidophenol in aqueous solutions of sulfuric acid
The kinetics of the hydrolysis of 2-phenylbenzoxazole, the hydrolysis and cyclization of o-benzamidophenol were studied spectrophotometrically.
The effective rate constant of the hydrolysis of 2-phenylbenzoxazole decreases with increasing H2SO4 concentration, while the effective rate constants of the hydrolysis and cyclization of o-benzamidophenol have maxima.
The dependence of the effective rate constants of the hydrolysis of 2-phenylbenzoxazole and the cyclization of o-benzamidophenol on the acid concentration is described by the same equations as the hydrolysis of amides, but in contrast to amides, in relatively weak solutions of acids 2-phenylbenzoxazole is already appreciably protonated.
KeywordsHydrolysis Aqueous Solution Amide Sulfuric Acid H2SO4
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