Combination of Sulfite Anion and Phase Transfer Catalysts for Green Cyclotrimerization of Aryl Isocyanates

Abstract

The catalytic cyclotrimerization of aryl and alkyl isocyanates by the novel combination catalysts of sulfite ion and Phase Transfer Catalysts (PTCs), as selective anionic catalysts, has been investigated. The use of phase transfer catalyst features the catalytic potency of sulfite anion and promotes the reaction in green conditions. Diverse aryl derivatives have been involved in the reaction condition giving corresponding isocyanurates in good to excellent yields. †Previous Name: Shadpour E. Mallakpour