Process for the production of carboxanilides

Details Process for the production of carboxanilides Process for the production of carboxanilides

2006-11-13

2010-10-26

Saeed, Kamal A (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07820830

ABSTRACT:
The present invention relates to a novel process for the preparation of a compound of general formula (I): wherein R1is H or C1-4alkyl and R2is difluoromethyl or trifluoromethyl, which comprises reacting a compound of general formula (II): wherein R1has the meaning given above and X is chloro or bromo, with a compound of general formula (III): wherein R2has the meaning given above, in the presence of a base, a palladium catalyst and a ferrocenyl biphoshine ligand of the Josiphos type, the reaction being carried out in an ether solvent at a reflux temperature of at least 100° C.

REFERENCES:
patent: 03074491 (2003-09-01), None
patent: 2004039799 (2004-05-01), None

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