Preparation and Analysis of Heterocyclic Rings Made from (Thioxanthone) Derivatives Methods of Biological Activity, Thermal Analysis

In this study heterocyclic compounds were prepared from thioxanthone derivatives and determined their structure by measuring melting point (M.P) infrared spectrum (FTR) 1HNMR for each one. These used testing antibacterial activity Streptococcus mutans, Staphylococcus saprophyticus, Enterococcus faecalis (Gram positive bacteria) Haemophilus influenzae negative bacteria). Prepared I,II,III,IIV showed clear against all tested bacteria either as solutions or powder. Solutions with DMSO have greater than those distilled. Compound I other compounds. On the hand, Gram-positive higher sensitivity Gram-negative ones to solutions. The results of thermal analysis stability at high temperatures (DSC TG curves). Key words: Thioxanthone, Schiff bases, , imidazolidin-4-one Oxazepine .