الفهرس 
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Abstract
This thesis deals with the behaviour of thiocarbohydrazide compounds as electron donors towards π-deficient compounds and characterization the products as well as the mechanism of their formation.
the reaction of some cycloalkylidene-N-substituted hydrazine-carbothioamides with benzo- and naphthoquinone derivatives to synthesize the corresponding substituted spiro[1,2,4]triazole-3-thione derivatives. On the other hand, heating of equimolar amounts of (ylidene)hydrazinecarbothioamides with 2,3-dichloro-1,4-naphthoquinone in ethyl acetate gave 2,3-dithioxo-2,3-dihydronaphthalene-1,4-dione.
Reacting 2-(1-substituted ethylidene)hydrazinecarbothioamides with 1-aryl-2-bromoethanones in refluxing ethanol, [(3,4-diaryl-1,3-thiazolylidene)(hydrazine-ylidene)]ethylpyridinium bromide monohydrates, (3,4-diaryl-1,3-thiazolylidene)-ethylidenehydrazinium bromides and (3,4-diaryl-1,3-thiazolylidene)hydrazines.
Cyclocondensation of 1-aryl-2-bromoethanone with 2-(1-substituted methylidene)-hydrazinecarbothioamides in absolute ethanol under reflux for one hour afforded the disubstituted 1,3-thiazoles.
Reaction of 1-aryl-2-bromoethanone with cycloalkylidene-N-phenylhydrazine-carbothioamides in in absolute ethanol has been carried out under reflux with stirring, A pale yellow precipitate from trisubstituted 1,3-thiazoles were separated.
Synthesis of methyl[1-(substituted ethylidene)hydrazono-4-oxo-3-substituted-1,3-thiazolidin-5-ylidene]acetates were carried out by refluxing 2-(1-substituted ethylidene)hydrazinecarbothioamides with dimethyl acetylenedicarboxylate.
Reactions between 2-(1-substituted methylidene)hydrazinecarbothioamides and dimethyl acetylenedicarboxylate gave Methyl-2-[(2Z,5Z)-2-[(E)-2-[(2-methoxy-phenyl)methylidene]hydrazin-1-ylidene]-4-oxo-1,3-thiazolidin-5-ylidene]acetate N,N-dimethyl formamide.
Reactions between cyclic-alkylidene-N-substituted hydrazinecarbothioamides and dimethyl acetylenedicarboxylate gave (Z)-methyl 2-((Z)-2-(cycloalkylidene-hydrazono)-4-oxo-3-arylthiazolidin-5-ylidene)acetate.