Pegah Mohagheghzadeh - Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University,Marvdasht, Iran
Soheila Ghassamipoor - Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University,Marvdasht, Iran
Mohammad Mehdi Ghanbari - Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University,Marvdasht, Iran
Elham Ahmadi - Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University,Marvdasht, Iran

The reaction of stoichiometric amounts of dialkyl acetylenedicarboxylates with alkylisocyanides and ۵,۵-diaryl thiohydantoins in toluene and catalytic amount of p-TSA affordedimidazo[۲,۱-b][۱,۳]thiazines in good overall yields.

Thiohydantoin, Imidazo[۲,۱-b][۱,۳]thiazine, Isocyanide, Acetylenedicarboxylate,Zwitterionic.