Appeal No. 94-4265
Application 08/035,915
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wherein R can be, inter alia, hydrogen; R and R may be the same or different and each may be
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hydrogen, a C -C alkyl group or a phenyl group; R is, inter alia, a C -C alkyl group; R is, inter1 6 1 6
alia, a carboxy-protecting group; and R is, inter alia, a C -C alkoxy group or a phenoxy group.6
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The method defined by claim 50 comprises cyclizing the compound of formula (I) to form the
compound of formula (IV). The method of claim 51 is essentially the reaction mechanism illustrated
above, but without identifying the compound having formula (I) as an intermediate. Claim 48 is
dependent on claim 51 and specifies that the method of claim 51 is effected without isolation of the
intermediate product (presumably the compound of formula (I)) produced by the reaction of
compounds having formulae (II) and (III).
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