Imine hydroboration
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 … Witrynaimine hydroboration reveals a first-order dependence on catalyst concentration. Both HBpin and 4-fluorophenyl-N-phenylmethanimine (1b) appear to exhibit saturation …
Imine hydroboration
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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 … Witryna1 gru 2007 · Magnesium catalysis of imine hydroboration. Merle Arrowsmith, M. Hill, G. Kociok‐Köhn; Chemistry. Chemistry. 2013; ... rate-determining process occurs at an isolated magnesium center and requires the presence of two molecules of the imine substrate for effective turnover, and this latter observation is rationalized as a …
Witryna8 lis 2024 · The first use of diazaphospholenes as chiral catalysts has been demonstrated with enantioselective imine hydroboration. A chiral diazaphospholene prepared in a … 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 …
WitrynaThe β-diketiminato magnesium alkyl complex [LMgnBu] (L=CH{CMe(NDipp)} 2, Dipp=diisopropylphenyl) is shown to be a highly effective precatalyst for the … Witryna1 sie 2024 · For the catalyst- and solvent-free hydroboration reaction of imine, N -benzylideneaniline, our calculations and experimental studies indicate that this …
Witryna7 wrz 2024 · An, D.K. Lithium bromide: An inexpensive and efficient catalyst for imine hydroboration with pinacolborane at room temperature. RSC Adv. 2024 , 10 , 34421–34427.
Witryna17 wrz 2024 · Catalytic hydroboration of imines is a simple and straight-forward method for the preparation of amines, unlike conventional hydrogenation reactions and … flutter json import replace null with zeroWitryna26 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 … greenhavenpublishing.comWitryna29 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 … greenhaven road capital diamond resortsWitrynacatalyst 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 … greenhaven road whalewisdomWitryna27 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 … flutterjni.init called more than onceWitrynaWe report the use of a cyclic carbodiphosphorane catalyst for ketone and imine hydroboration reactions. Ketone hydroboration reactions are particularly rapid, typically reaching completion within 15 min using a 1 mol % catalyst loading at 25 °C. To our knowledge, this represents the first use of a carbodiphosphorane as an … greenhaven prison picturesWitryna19 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 … flutter json decode unexpected character