Appeal No. 94-4265
Application 08/035,915
10 11
wherein R represents a hydrogen atom or a C -C alkyl group and R represents a
1 4
hydrogen atom, allyloxycarbonyl, 2-methylallyloxycarbonyl, 2-chloroallyloxy-
carbonyl, 2,2,2-trichloroethoxy-carbonyl, 2,2,2-tribromoethoxycarbonyl, p-nitro-
benzyloxycarbonyl or o-nitrobenzyloxycarbonyl,
groups of the formula
12 13
wherein R and R are the same or different and each represents a hydrogen atom
or a C -C alkyl group and Y represents an oxygen atom, a sulphur atom or an imino
1 4
group which may be optionally substituted with a C -C alkyl group,
1 4
C -C alkoxycarbonyl groups, benzyloxycarbonyl, phenethyloxycarbonyl, p-nitrobenzyloxycarbonyl
2 7
and o-nitrobenzyloxy carbonyl group; and
the substituents attached to the nitrogen atoms of the non-aromatic heterocyclic
groups may be substituted with one or more groups selected from the group
consisting of C -C alkyl groups, C -C alkoxy groups hydroxy, amino, halogen, C -1 4 1 4 , 1
C aliphatic acyloxy groups, C -C aliphatic acylarnino groups, cyano, azido, carboxy,1
5 1 5
C -C alkoxycarbonyl groups, the carbamoyl group, C -C alkylthio group, C -C1
2 5 1 4 l 4
alkylsulphinyl groups, C -C alkylsulphonyl groups, nitro group, and groups of
1 4
formula
14 15
wherein R and R are the same or different and each represents a hydrogen atom
or a C -C alkyl group;
1 4
a substituted alkyl group, said substituted alkyl groups being selected from the group consist-
ing of a hydroxyalkyl group, a protected hydroxy alkyl group, an aminoalkyl group, and a protected
-14-
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Last modified: November 3, 2007