Appeal No. 2006-2378 Page 3
Application No. 10/433,388
Discussion
1. Claim construction
Claims 1-11 are on appeal. Claims 1 and 2 are representative and read as
follows:
1. A process for the preparation of a compound of the formula (I)
wherein R represents a 2,3-dihydroxy-1-propyl or a 1,3-dihydroxy-2-propyl radical,
which comprises reacting a di-alkyl ester of 5-amino-1,3-benzenedicarboxylic acid of
formula (V),
wherein R1 represents a straight or branched (C1-C4)-alkyl group, with at least two
moles of an amine of formula H2NR wherein R is defined as above.
2. The process of claim 1 wherein the starting compound of formula (V) is
obtained by reduction of the corresponding 5-nitro-1,3-benzenedicarboxylic di-alkyl
esters of formula (VI),
wherein R1 is as defined above.
Together, claims 1 and 2 recite a process where the nitro group of the compound
of formula (VI) is first converted to an amine group by reduction, to yield the compound
of formula (V), and the compound of formula (V) is then reacted with an amine
compound to yield the carboxamides of formula (I). Thus, in the claimed process, the
reducing step is performed first, followed by the amidating step.
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