2024-03-28T11:42:54Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/339172021-06-24T07:42:39Zcom_10324_1187com_10324_931com_10324_894com_10324_28542com_10324_952col_10324_1408col_10324_28543
Chiral Bifunctional Thioureas and Squaramides Grafted into Old Polymers of Intrinsic Microporosity for Novel Applications
Valle Álvarez, María
Martín, Laura
Maestro Fernández, Alicia
Andrés García, José María
Pedrosa Sáez, Rafael
We have prepared different polymeric chiral bifunctional thioureas and squaramides by modification of the very well-known polymers of intrinsic microporosity (PIM), specifically PIM-1 and PIM-CO-1, to be used as recoverable organocatalysts. The installation of the chiral structures into the polymers has been done in two or three steps in high yields. The catalytic activity of the resulting materials has been proved in the stereoselective nitro-Michael addition and in a cascade process, which allows the synthesis of enantioenriched 4H-chromene derivatives. Squaramide II and thiourea III have been used in six cycles maintaining their activity. View Full-Text
2019-01-11T12:01:32Z
2019-01-11T12:01:32Z
2019-01-11T12:01:32Z
2019
info:eu-repo/semantics/article
Polymers 2019, 11(1), 13
2073-4360
http://uvadoc.uva.es/handle/10324/33917
https://doi.org/10.3390/polym11010013
eng
https://www.mdpi.com/2073-4360/11/1/13
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 International
MDPI