Pyrrolidine-based catalytic microporous polymers in sustainable C=N and C=C bond formation via iminium and enamine activation
| Autor: | E.L. Vargas, N. Esteban, J. Cencerrero, V. Francés, C. Álvarez, J.A. Miguel, A. Gallardo, A.E. Lozano, M.B. Cid |
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| Přispěvatelé: | Ministerio de Ciencia e Innovación (España), Junta de Castilla y León, European Commission |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Microporous polymer networks
Polymers and Plastics Polymers Catalysis Electronic Optical and Magnetic Materials Biomaterials Colloid and Surface Chemistry Green chemistry Pyrrolidine confined catalysts Materials Chemistry Solvents Enamine catalysis Porous materials Iminium catalysis Green solvents Polimeros y polimerización |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| DOI: | 10.1016/j.mtchem.2022.100966 |
| Popis: | Producción Científica A new set of catalytic materials having a pyrrolidine moiety confined in microporous organic polymer networks (POPs) has been attained. These catalytic polymers have been prepared by a straightforward synthesis starting from microporous polymer networks made from isatin (or a mixture of isatin and trifluoroacetophenone) and 1,3,5-triphenylbenzene. The polymers efficiently catalyzed the formation of nitrones under very mild and sustainable conditions using green solvents through an iminium ion activation mechanism. The reactions are scalable, and polymers are easily recycled. Special attention has been paid to understanding all the factors that could affect the efficiency of the confined catalysts. The electronic and conformational characteristics of the pyrrolidine moiety attached to the porous polymers, as well as other features that could affect the transport through the network, such as molecular volume and shape of reactants and products, and even hydrophilic or hydrophobic properties, have been systematically evaluated. In addition, the heterogeneous polymers are also useful in Cdouble bondC bond formation through both iminium ion and enamine activation. Gobierno de España (Agencia Estatal de Investigación) - (Projects CTQ2016-78779-R, PID2019-109403RB-C22, RTI2018-096328-B-I00, CTQ2017-89217-P and PID2020-118547GBI00) Junta de Castilla y León, Unión Europea y Fondo Europeo de Desarrollo Regional (FEDER) - (Project VA224P20)) |
| Databáze: | OpenAIRE |
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