1,1′-Sulfinyldipyridinium bis (hydrogen sulfate) ionic liquid: synthesis and application in the temperature-influenced synthesis of novel pyranopyrimidinediones and pyranopyrimidinetriones

Abstract

A novel and robust dication Brønsted acidic ionic liquid as a catalyst for the temperature influenced synthesis of novel pyranopyrimidinediones and pyranopyrimidinetriones.

Construction of silsesquioxane and phosphinum‐based ionic porous hypercrosslinked polymers for efficient heterogeneous catalytic CO2 cycloaddition

“…Interestingly, VPOSS not only plays a key role in construct robust porous skeletons with a hydrophobic micro‐environment for catalysis, but also provide the desired Si‐OH HBD groups that formed by the in‐situ breakage of cubic POSS cages 14–16 . During the synthesis of P‐iPHCPs, the catalyst AlCl 3 can react with Br − anions within [Ph 3 PMe]Br, leading to the formation of the metal‐halogen complex anion [AlCl 3 Br] − that behaves both Lewis acidity and nucleophilicity 33,45 . Meanwhile, free Cl − anions can also be introduced into P‐iPHCPs from AlCl 3 by ion‐exchange with Br − anions in ionic monomers.…”

Facile and Green Chemistry Access to 5‐aryl‐1,2,4‐Triazolidine‐3‐thiones in Aqueous Medium

“…To the best of our knowledge, a very limited number of reports are available in the literature till date for the synthesis of 5‐aryl‐1,2,4‐triazolidine‐3‐thiones which involved the utilization of [C 16 MPy]AlCl 3 Br, sulfamic acid, PEG‐400, glycine nitrate, [2‐HMPyBSA]HSO 4 and [(Py) 2 SO][HSO 4 ] 2. …”