Zhang, Jingshun published the artcileCombination of experimental and theoretical methods to explore the amino-functionalized pyrazolium ionic liquids: An efficient single-component catalyst for chemical fixation of CO2 under mild conditions, Synthetic Route of 930-36-9, the publication is Molecular Catalysis (2019), 37-45, database is CAplus.
Four new amino-functionalized pyrazolium ionic liquids, I [R = Me, Et; n = 1, 2] were firstly synthesized in simple reaction steps with cheap raw materials. Ionic liquids I would catalyze the coupling reaction of carbon dioxide with propyleneoxide under optimal reaction conditions, 110 °C, 1.5 MPa carbon dioxide initial pressure as well as 1.0 mol% catalyst amount for 4.0 h, with propylene carbonate yield over 94%. The reaction temperature was decreased by 10-20 °C as compared with other single-component ionic liquids and at the same time, carbon dioxide initial pressure was not increased to keep 1.5 MPa. The recyclability and suitability of amino-functionalized pyrazolium ionic liquids were explored and catalytic mechanism was investigated by d. functional theory. Moreover, the influence of weak interactions on reaction was analyzed by atoms in mols. and non-covalent interactions. As compared with other reported ionic liquids, the reaction condition catalyzed by ionic liquid I [R = Et, n = 2] was more benign with comparable product yield. More importantly, there was good balance among various reaction conditions without sacrificing one to ensure others.
Molecular Catalysis published new progress about 930-36-9. 930-36-9 belongs to pyrazoles-derivatives, auxiliary class Pyrazole, name is 1-Methylpyrazole, and the molecular formula is C8H8O3, Synthetic Route of 930-36-9.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics