الفهرس 
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Abstract
This thesis includes three chapters; the first of which
is a brief review on the recent methods utilized for the
synthesis of” various heterocycles condensed with the 1, 2, 4-
triazine ring.
Chapter II is a discussion of the work carried out by
the candidate. It deals with the versatility and regio-
selectivity of the annelation of a triazole ring to 1,2,4-
triazino[5,6-b]indoles and it was divided according to the
type of substituent on the triazinoindole ring. Thus, 3-
hYdrazino-5-methyl-1,2,4-triazino[5,6-b]indole I was pre-
pared and its reaction with acetaldehyde was carried out
hereby acetaldehyde(5-methyl-l.2,4-triazino[5,6-b]indol-3-
y1)hydrazone II was formed. Similarly, a series of the
hydrazones III were prepared by the condensation of I with
onosaccharides, such as Q.-galactose, Q.-glucose, Q.-mannose, <g-arabinose, L-arabinose, D-ribose and Q.-xylose.