Direct alkylation of N-alkyl-N′-phenyl-p-phenylenediamine
US7361788B2 · kind B2 · utility
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7References
13Claims
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Key dates
| Filing date | Jan 24, 2006 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Jan 24, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A single-step process is disclosed for the ring alkylation of at least one N-alkyl-N′-phenyl-phenylenediamine with at least one olefin wherein the process comprises heating a mixture of the N-alkyl-N′-phenyl-phenylenediamine(s) and olefin(s) in the presence of a catalytic amount of at least one alkyl aluminum halide at a temperature of from about 50 to about 350° C. in a sealed vessel for from about one to about 30 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.