A process for forming an aromatic amine product comprises the steps of (a) combining an aromatic primary or secondary initial amine with an aromatic halide compound in the presence of a palladium complex and a phosphine compound catalyst to form a mixture; (b) heating the mixture to a first temperature of at least 60°C; (c) adding a base material to the heated mixture; and (d) maintaining the temperature of the mixture at or above the first temperature for a period of time sufficient to form as a product an aromatic substituted form of the aromatic primary or secondary initial amine. The process provides products of high purity in good yields.
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AROMATIC AMINES WITH LOW SOLVATION
A process for preparing a polymorph of a N,N,N',N'-tetraaryldiamine having low solvation comprises: a) crystallizing the diamine from a solvent comprising a hydrocarbon to form a solvated polymorph; b) mixing the amine with an alcohol; c) distilling the mixture to remove a portion of the solvent; and d) repeating steps b and c until the desired level of low solvation is achieved. The process enables reduced solvation levels in the polymorph.
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