1-Butyl-3-methylimidazolium Tetrafluoroborate as a Green Reaction Medium

Jorapur, Yogesh R.

doi:10.1055/s-2004-817756

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…The lengthy reaction times, which are a disadvantage of both proline‐ and SMP‐catalyzed Mannich reactions, can be considerably decreased (by a factor of 4 to 50) by replacing standard organic solvents by ionic liquids, such as [bmim]BF 4 or [bmim]PF 6 48. 49 With this modification as little as 1 mol % of the catalyst may be used with reasonable reaction times (approximately 2 h). The products are usually formed in higher yields than in organic solvents, and similar enantioselectivities are observed.…”

Section: Reactions Via Covalent Transition Complexesmentioning

confidence: 99%

In the Golden Age of Organocatalysis

2004

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The term "organocatalysis" describes the acceleration of chemical reactions through the addition of a substoichiometric quantity of an organic compound. The interest in this field has increased spectacularly in the last few years as result of both the novelty of the concept and, more importantly, the fact that the efficiency and selectivity of many organocatalytic reactions meet the standards of established organic reactions. Organocatalytic reactions are becoming powerful tools in the construction of complex molecular skeletons. The diverse examples show that in recent years organocatalysis has developed within organic chemistry into its own subdiscipline, whose "Golden Age" has already dawned.

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Section: Reactions Via Covalent Transition Complexesmentioning

confidence: 99%

In the Golden Age of Organocatalysis

2004

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“…Diese werden erheblich (um den Faktor 4–50) verkürzt, wenn anstelle gängiger organischer Lösungsmitteln ionische Flüssigkeiten wie [bmim]BF 4 oder [bmim]PF 6 eingesetzt werden 48. 49 Dabei genügt bereits 1 Mol‐% Katalysator, um annehmbare Reaktionszeiten (etwa 2 Stunden) zu erzielen. Bei ähnlichen Enantioselektivitäten erhält man zudem oft höhere Ausbeuten als bei Reaktionen in organischen Lösungsmittel.…”

Section: Reaktionen Mit Kovalenten üBergangskomplexenunclassified

Im Goldenen Zeitalter der Organokatalyse

2004

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Unter dem Begriff “Organokatalyse” werden chemische Reaktionen zusammengefasst, die durch Zusatz substöchiometrischer Mengen von organischen Verbindungen beschleunigt werden. Das Interesse an diesem Forschungsgebiet und den damit verbundenen neuen Konzepten hat in den vergangenen Jahren stark zugenommen. Viele der bekannten organokatalytischen Reaktionen sind bezüglich ihrer Effizienz und Selektivität mit etablierten organischen Reaktionen vergleichbar, und die Organokatalyse hat sich beim Aufbau komplexer Molekülgerüste bewährt. Die verschiedenartigen Beispiele zeigen, dass sich die Organokatalyse in den letzten Jahren zu einem selbständigen Teilgebiet der Organischen Chemie entwickelt hat, dessen “Goldenes Zeitalter” bereits angebrochen ist.

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“…9 The fulfilled nanofiber-like structure of F-CAC increases surface area, allowing efficient deposition of metal nanoparticles and high stability during catalytic reactions. 9,10 More recently, we reported dehydrogenative oxidation of hydrosilanes under aerobic conditions using Au:F-CAC, revealing that the reaction takes place at the cationic Au sites generated via the adsorption of oxygen. 9c Given our previous report, we conceived that the Au:F-CAC could also be applicable for the dehydrosilylation of alcohols.…”

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confidence: 99%

Dehydrosilylation of Alcohols Using Gold Nanoparticles Deposited on Citric Acid-modified Fibrillated Cellulose

Suwattananuruk,

Uetake,

Sakurai

2024

Synlett

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The development of an effective catalytic system for the dehydrogenative coupling of hydrosilanes with alcohols remains an ongoing challenge, particularly for alcohol protection applications. In this study, we report the development and optimization of a highly efficient gold catalyst supported on fibrillated cellulose modified with citric acid (F-CAC). The catalyst exhibited remarkable catalytic activity under mild conditions with 0.01–0.05 mol% of Au loading, facilitating the formation of silyl ethers with excellent yield. Notably, our catalytic system overcomes the need for excess alcohol typically required in such reactions, making it highly practical for alcohol protection applications. This work represents a significant advancement in the field of dehydrosilylation catalysis, offering a sustainable, efficient, and environmentally friendly approach for the synthesis of functional silanol-based materials and alcohol protection applications. The scope of substrates and the utility of the catalyst have been thoroughly studied.

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1-Butyl-3-methylimidazolium Tetrafluoroborate as a Green Reaction Medium

Abstract: This feature focuses on a reagent chosen by a postgraduate, highlighting the uses and preparation of the reagent in current research 1-Butyl-3-methylimidazolium Tetrafluoroborate as a Green Reaction Medium

Cited by 6 publications

References 4 publications

In the Golden Age of Organocatalysis

In the Golden Age of Organocatalysis

Im Goldenen Zeitalter der Organokatalyse

Dehydrosilylation of Alcohols Using Gold Nanoparticles Deposited on Citric Acid-modified Fibrillated Cellulose

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