Imine hydroboration
Witryna29 mar 2024 · A series of strongly Lewis acidic cationic aluminium complexes, stabilized by β–diketiminate (BDI) ligands and free of Lewis bases, have been prepared as their B(C 6 F 5) 4 − salts. Their catalytic activity in imine hydrogenation depends strongly on the substituents in the BDI ligand. DFT calculations on the mechanism reveal two … Witryna7 wrz 2024 · Although there exists a variety of different catalysts for hydroboration of organic substrates such as aldehydes, ketones, imines, nitriles etc., recent evidence …
Imine hydroboration
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Witryna19 lut 2024 · Boron Lewis acid-catalyzed and catalyst-free hydroboration reactions of imines are attractive due to the mild reaction conditions. In this work, the mechanistic details of the hydroboration reactions of two different kinds of imines with pinacolborane (HBpin) are investigated by combining density functional theory calculations and … Witryna8 lis 2024 · The first use of diazaphospholenes as chiral catalysts has been demonstrated with enantioselective imine hydroboration. A chiral diazaphospholene prepared in a …
Witryna23 lut 2024 · We describe a simple and efficient procedure for nucleophilic borylation of imines in the absence of a photoredox catalyst. Visible light irradiation of an … Witryna27 lip 2024 · In summary, we have developed an approach for catalytic, mild and high-yielding hydroboration of nitriles. The catalyst system, consisting of a borane with comparably low Lewis acidity and a Lewis base, reacts with pinacolborane reversibly, providing a borenium cation for the imine activation while simultaneously generating a …
Witryna11 sty 2024 · Boron Lewis acid-catalyzed and catalyst-free hydroboration reactions of imines are attractive due to the mild reaction conditions. In this work, the mechanistic … Witryna26 kwi 2024 · Consequently, catalytic hydroboration of a variety of imine substrates can be realized with 1 as the catalyst and HBpin as the terminal reagent. A mechanistic proposal implicating a P-N cooperative mechanism for catalysis that incorporates the various independently verified stoichiometric steps is presented, and a comparison to …
Witryna19 cze 2024 · The rarely used boron Lewis acid tris[3,5-bis(trifluoromethyl)phenyl]borane (BArF3) is found to be an excellent catalyst for metal-free hydroboration of imines. In …
WitrynaHeterocyclic C-substituted imine was applied under the given conditions, providing boronated aniline 7n in 40 min. When introducing an ester group to C-phenyl of … asia 100 bcWitrynacatalyst for imine hydroboration with pinacolborane at room temperature† Hanbi Kim, Hyun Tae Kim, Ji Hye Lee, Hyonseok Hwang and Duk Keun An * An efficient protocol … asia & sushi restaurant menuWitryna11 sty 2024 · Detailed DFT calculations and experiments were performed to study the hydroboration mechanisms of two different kinds of imines. Our results revealed that … asia 11 2022WitrynaThe catalytic dehydrocoupling of amine–boranes has recently received a great deal of attention due to its potential in hydrogen storage applications. The use of aluminum catalysts for this transformation would provide an additional cost-effective and sustainable approach towards the hydrogen economy. Herein, we report the use of … asus ac adapter 19v 6.32aWitryna11 sty 2024 · Boron Lewis acid-catalyzed and catalyst-free hydroboration reactions of imines are attractive due to the mild reaction conditions. In this work, the mechanistic details of the hydroboration reactions of two different kinds of imines with pinacolborane (HBpin) are investigated by combining density functional theory calculations and … asus ac adapter 19v 2.37aWitryna8 lis 2024 · The first use of diazaphospholenes as chiral catalysts has been demonstrated with enantioselective imine hydroboration. A chiral diazaphospholene prepared in a … asia 105Witryna26 kwi 2024 · Consequently, catalytic hydroboration of a variety of imine substrates can be realized with 1 as the catalyst and HBpin as the terminal reagent. A mechanistic … asia 100