Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2006-12-05
2006-12-05
Owens, Amelia A. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C546S312000
Reexamination Certificate
active
07145035
ABSTRACT:
The present invention pertains to methods for preparing a compound of Formula (I), wherein A is O or N-L; each L is independently H or an acyl group; K is, together with the two contiguous linking carbon atoms, a phenyl ring, a 5- or 6-membered heteroaromatic ring or an aromatic 8-, 9- or 10-membered fused carbobicyclic or heterobicyclic ring system wherein each ring or ring system is optionally substituted; R1is H, C1to C4alkyl or CO2R3; R2is H or C1to C4alkyl; and R3is C1to C4alkyl; comprising hydrogenating a compound of Formula (II), wherein n is 0, 1 or 2 in the presence of a catalyst comprising palladium to form the compound of Formula (I). This invention further pertains to methods for preparing compounds of Formula (II) useful for preparing compounds of Formula (I). This invention also pertains to compounds used in these methods
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Annis Gary David
Brown Richard James
Casalnuovo Albert Loren
Jacobson Stephen Ernest
Moss Philip Osborne
E. I. du Pont de Nemours and Company
Owens Amelia A.
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