Appeal 2007-0549
Application 10/399,312
reacted with bifunctional aromatic compounds to form the heterocyclic rings
in a single reaction step” (id.).
The Specification discloses, however, that the prior art processes “are
disadvantageous since they demand extremely high reaction temperatures,
resulting in the formation of impurities which are difficult to remove from
the final products and, as a consequence, loss of product yields” (id.). Also,
“such high-boiling solvents are . . . difficult to remove from the reaction
products and may further result in crust-formation inside reaction vessels,
thus impeding work-up of the final products. Additionally, employment of
chlorinated aromatic solvents . . . is undesirable for ecological reasons” (id.).
The Specification discloses processes in which bis-benzazolyl
compounds are prepared by reacting dicarboxylic acids or their esters with
bifunctional aromatic compounds, such as aminophenol, in the presence of
an acid catalyst, using N-methylpyrrolidone or N,N-dimethylacetamide as
the solvent (id. at 2).
DISCUSSION
1. CLAIMS
Claims 1-11 are pending and on appeal. The claims have been argued
together (Br. 4),1 and therefore stand or fall together. 37 C.F.R.
§ 41.37(c)(1)(vii). We will focus on claim 1, the broadest claim on appeal,
which reads as follows:
1. A process for the preparation of a compound of the
formula
1 Supplemental Appeal Brief received June 22, 2006.
2
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