Yalda kashkooli - Department of chemistry, Karaj branch, Islamic Azad University, Karaj, Iran.
Afshin rajabi khorrami - Department of chemistry, Karaj branch, Islamic Azad University, Karaj, Iran.
Somayeh makarem - Department of chemistry, Karaj branch, Islamic Azad University, Karaj, Iran.

We used nano particles of 4H-pyranwere synthesized by using arylaldehyde, dimedone and active methylene in propanol in the presence of constant current as catalyzer. The synthesized compounds have been screened for their antibacteriall activities. Some of nano particles of 4H-pyranwere showed antimicrobial activities against some gram positive and negative bacterias

4H-pyran, Chloramphenicol, Gentamicin, Nystatin, antimicrobial, nanoparticles