کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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59471 | 1419428 | 2015 | 5 صفحه PDF | دانلود رایگان |
Chiral Ir complexes were successfully used in the asymmetric hydrogenation of olefins, ketones, and quinolines. However, almost all the catalytic systems could not tolerate a high catalyst loading because of the formation of an irreversible iridium dimer and trimer during the reaction. It is expected that higher catalytic activity may be achieved if the Ir-complexes were isolated in space. The development of conjugated microporous polymers (CMPs) gives the opportunity for the spatial separation of the complexes. A series of chiral CMPs based on the chiral (R)-BINAP ligand (BINAP-CMPs) with different surface areas were synthesized. The BINAP ligands were separately distributed in the framework and were three times more active than the homogeneous catalyst (TOF 340 h−1VS 100 h−1) for the asymmetric hydrogenation of quinolines.
Graphical AbstractA series of chiral BINAP-CMPs with different surface areas were synthesized which were three times more active than the homogeneous BINAP catalyst (TOF 340 h−1VS 100 h−1) for the asymmetric hydrogenation of quinolines.Figure optionsDownload as PowerPoint slide
Journal: Chinese Journal of Catalysis - Volume 36, Issue 8, August 2015, Pages 1170–1174