In this research, we synthesized oxazine and thiazine derivatives (3-6). These of chacone compounds (1 2) that from 4- hydroxyacetophenone aldehyde such as, 4-bromobenzaldehyde chlorobenzaldehyde. chalcone (1-2) reacted with urea to produce as 4-[4-amino-6-(4-subsutitedphenyl)-2H-1,3-oxazin-2-yl] phenol (3 4) thiourea 4-[4-amino-6-(4-subsutitedphenyl)-2H-1,3-thiazin-2-yl] (5 6). were characteri...

Polybenzoxazines are known to have superior thermal stability. Especially, the use of aromatic aldehydes instead formaldehyde for synthesis benzoxazines monomers could improve this However, increase in content monomer can prevent processability. The objective article is understand relationships between conformation an dialdehyde and its properties. Two benzoxazine were synthesized, based on sal...