Process for preparing ortho substituted phenylamines
AssigneeCrompton Corporation
InventorsRussell E. Malz, Jr., Ranjit Kumar, Luis Javier Garces, Steven L. Suib
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Abstract
A process is disclosed for preparing ortho substituted phenylamines comprising contacting phenylhydroxylamine, optionally substituted with at least one inert substituent, with a nucleophilic reagent in the presence of a manganese oxide at a temperature between about 10° C. and about 170° C. and a pressure from subatmospheric to superatmospheric such that an ortho substituted phenylamine, optionally correspondingly substituted with at least one inert substituent, is predominantly formed.
Claims14
A process of preparing ortho substituted phenylamines comprising contacting phenylhydroxylamine, optionally substituted with at least one inert substituent, with a nucleophilic reagent in the presence of a manganese oxide at a temperature between about 10° C. and about 170° C. and a pressure from subatmospheric to superatmospheric such that an ortho substituted phenylamine, optionally correspondingly substituted with at least one inert substituent, is formed.
A process for preparing ortho substituted phenylamines comprising contracting phenylhydroxylamine, optionally substituted with at least one inert substituent, with a nucleophilic reagent, the molar ratio of nucleophilic reagent to phenylhydroxylamine ranging from about 2 to about 100, the contacting of the phenylhydroxylamine and nucleophilic reagent being conducted in the absence of oxygen and in the presence of a catalyst that is a cryptomelane-type manganese oxide Octahedral Molecular Sieve, with a composition of KMn8O16.nH2O (n=0.5-10) in which said molecular sieve comprises MnO6 octahedral structural units that are edge and corner shared to form a 4.6×4.6 tunnels as a result of 2×2 arrangement of octahedra, in which the potassium ions are present in the tunnels with water and said potassium ions are ion-exchanged by H+ ions using nitric acid to obtain the acidic form of said sieve at temperatures ranging from about 70° C. to about 120° C., whereby an optionally-substituted ortho substituted phenylamine is formed.
Dependencies are inferred from the claim text.