الخلاصة

The aim of this work, synthesis of mono cycles containing di and tri-hetero atoms from (N,S,O and Se) via reaction between di ester compounds with hetero atoms compounds like (alkyl di amine, ethylene glycol, ethylene di thiol ,sodium hydro selenium with di chloro ethylene)., and synthesis some of them via reaction of dicarbonyl compounds with di hetero atoms compounds to give cycles included two or more heteroatoms (N,S,O and Se) by several steps via condensation reactions . All formatted compounds have investigation using several spectral techniques (elemental analysis (C.H.N) ,1 HNMR-spectra, FT-IR-spectra) and measurement of melting points