Process for preparing...

Details Process for preparing... Process for preparing...

2006-01-10

2006-01-10

Raymond, Richard L. (Department: 1624)

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

Organic compounds

Amino nitrogen containing

Reexamination Certificate

active

06984757

ABSTRACT:
A process for the preparation of a 4-(4-flourophenyl)-6-alkyl-2-N-alkansulfonyl-N-alkylamino)pyrimidine-5-carboxylic acid ester of formula (Ib), in which R1, R2, R3and R4are identical or different and are each a C1-6-alkyl. A 2-[-1-amino-1-(4-flourophenyl)methylene]-4-alkyl-3-oxo-alkanoic acid ester of formula (IIIb), in which R3and R4have the above-mentioned meanings, is reacted with an N-cyano-N-alkylalkanesulfonamide, optionally isolated or prepares in situ, of formula (IVb), in which R1and R2have the above-mentioned meanings, to give the final product of formula (Ib).

REFERENCES:
patent: 4013706 (1977-03-01), Anatol et al.
patent: 5260440 (1993-11-01), Hirai et al.

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