Abstract
New hydroxy Schiff bases have been synthesized from salicylaldehyde, o-hydroxy-acetophenone, β-hydroxynaphthaldehyde, and 4,5-dimethyl- o-phenylenediamine. Their thermal decomposition and mass fragmentation at different temperatures were studied and compared. β-Hydroxynaphthaldehyde Schiff bases decompose to give naphthoisoxazole, whereas salicylaldehyde and o-hydroxyacetophenone Schiff bases decompose through benzimidazole derivative intermediates.
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