Process for the production of amides

Details Process for the production of amides Process for the production of amides

2011-08-09

2011-08-09

Saeed, Kamal (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S374100

Reexamination Certificate

active

07994341

ABSTRACT:
The present invention relates to a process for the preparation of compounds of formula (I) wherein R1and R2are each independently of the other hydrogen or C1-C5alkyl and R3is CF3or CF2H, by a) reaction of a compound of formula (II) wherein R1and R2are as defined for formula (I), with at least one reducing agent to form a compound of formula (III) wherein R1and R2are as defined for formula (I), and b) reaction of that compound with at least one reducing agent to form a compound of formula (IV) wherein R1and R2are as defined for formula (I), and (c) reaction of that compound with a compound of formula (V) wherein Q is chlorine, fluorine, bromine, iodine, hydroxy or C1-C6alkoxy and R3is as defined for formula (I), to form the compound of formula (I); and to novel intermediates for use in that process.

REFERENCES:
patent: 7732469 (2010-06-01), Tobler et al.
patent: 2004018438 (2004-03-01), None
patent: 2004035589 (2004-04-01), None

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