Process for the production of anilines

Details Process for the production of anilines Process for the production of anilines

2006-08-28

2010-06-15

Davis, Brian J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C564S415000

Reexamination Certificate

active

07737301

ABSTRACT:
The present invention relates to a process for the preparation of compounds of formula wherein R1, R2and R3are each independently of the others hydrogen or C1-C4alkyl, by a) reacting compounds of formula (II) wherein R1, R2and R3are as defined for formula (I) and X is bromine or chlorine, with a compound of formula (III) wherein R4is hydrogen or C1-C4alkyl, in the presence of a base and catalytic amounts of at least one palladium complex compound, to form compounds of formula (IV) wherein R1, R2, R3and R4are as defined for formula (I), and b) converting those compounds, using a reducing agent, into compounds of formula (I).

REFERENCES:
patent: 2005/0221989 (2005-10-01), Walter et al.
patent: 03/074491 (2003-09-01), None
patent: 2006/061226 (2006-06-01), None
Noriyasu Katoaka et al: “Air Stable, Sterically Hindered Ferrcenyl Dialkylphosphines for Palladium-Catalyzed C-C, C-N, and C-O Bond-Forming Cross-Coupling”, Journal of Organic Chemistry, American Chemical Society. Easton, US, vol. 67, Jul. 4, 2002, pp. 5553-5566.

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