Original Paper
1. nanosilica extracted from rice husk in Polyhydroqinilion Synthesis

Ali Reza Kiasat; Raziye Najafi Birgani

Volume 5, Issue 1 , Spring 2015, Pages 40-46

Abstract
  Phosphosulfonic acid as a multi solid site was easilyprepared from the reaction of ammonium dihydrogen phosphatewith chlorosulfonic acid in CCl4and for improved its catalyticactivity was supported nano Silica was extracted from husk ricecontains about 95% of Silica the size of extracted nano silica wasdetermined ...  Read More

Original Paper
2. Effiecient Synthesis of tetrazoloquinoxaline derivatives

Mohsen Nikpour; Elie Salami

Volume 5, Issue 1 , Spring 2015, Pages 1-6

Abstract
  Displacement reaction of 2,3-dichloroquinoxaline with secondary amines in boiling ethanol afforded it`s mono aminoquinoxaline derivatives. Further reaction of the latter compounds with sodium azide in warm dimethylsulfoxide achieved a group of 4-amino tetrazolo[1,5-a]quinoxaline derivatives. 1HNMR spectra ...  Read More

Original Paper
3. reaction of thiohydantoins and ethylbromopyruvate for Synthesis of imidazo[2,1-b]thiazole 3-carboxylate

Nasimeh Zarei; Mohammad Mehdi Ghanbari; Marzieh Jamali; Mahboobeh Kiamarsi; Pegah Mohagheghzadeh

Volume 5, Issue 1 , Spring 2015, Pages 24-27

Abstract
  Imidazo[2,1-b]thiazoles are obtaind in excellent yields from the addition reaction between thiohydantoin and ethylbromopyruvate. These imidazo[2,1-b]thiazoles in the presence of p-TSA in boiling toluene refluxed for 2.5 hours led to imidazo[2,1-b]thiazole-3-carboxylates in elimination reactions  Read More