When SF5 outplays CF3: effects of pentafluorosulfanyl decorated scorpionates on copper†
| Autor: | H. V. Rasika Dias, Pavel K. Mykhailiuk, Anurag Noonikara-Poyil, Andrii Boretskyi, Alvaro Muñoz-Castro |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Chemical Science |
| ISSN: | 2041-6539 2041-6520 |
| Popis: | Polyfluorinated, electron-withdrawing, and sterically demanding supporting ligands are of significant value in chemistry. Here we report the assembly and use of a bis(pyrazolyl)borate, [Ph2B(3-(SF5)Pz)2]− that combines all such features, and involves underutilized pentafluorosulfanyl substituents. The ethylene and carbonyl chemistry of copper(i) supported by [Ph2B(3-(SF5)Pz)2]−, a comparison to the trifluoromethylated counterparts involving [Ph2B(3-(CF3)Pz)2]−, as well as copper catalyzed cyclopropanation of styrene with ethyl diazoacetate and CF3CHN2 are presented. The results from cyclopropanation show that SF5 groups dramatically improved the yields and stereoselectivity compared to the CF3. Copper–ethylene and carbonyl complexes of the newly developed [Ph2B(3-(SF5)Pz)2]− enable the study of ligand steric and electronic effects caused by the –SF5 group (dubbed “super CF3”), and a comparison to the –CF3 bearing analogs. |
| Databáze: | OpenAIRE |
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