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US 7,563,929 B2Granted
Alkylation of N′-phenyl-N-alkylphenylenediamines in ionic liquid and N′-phenyl-N-alkyl(alkylphenylene) diamines produced thereby
AssigneeChemtura Corporation
InventorsSteven J. Hobbs, Joseph F. Stieber
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Abstract
A process for alkylation of a N′-phenyl-N-alkyl-p-phenylenediamine of specified formula in an ionic liquid unexpectedly produces a N′-phenyl-N-alkyl(alkylphenylene)diamine of a second specified formula. The use of an inorganic liquid permits convenient separation of the alkylated reaction product from the reaction mixture.
Claims19
A process for alkylating a N′-phenyl-N-alkylphenylenediamine comprising reacting a N′-phenyl-N-alkylphenylenediamine of Formula I
- wherein R1 is an alkyl group or an arylalkyl group,
- with an alkylating agent in the presence of an ionic liquid comprising a Lewis acid and a quatemary cation, to produce a N′-phenyl-N-alkyl(alkylphenylene)diamine of the Formula II
- wherein R1 is as defined above, and
- R2 is a substituted or unsubstituted linear, branched or cyclic alkyl group or an alkylaryl group.
1 more element
Dependencies are inferred from the claim text.