Imine hydroboration
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 details of the hydroboration reactions of two different kinds of imines with pinacolborane (HBpin) are investigated by combining density functional theory calculations and … 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 …
Imine hydroboration
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WitrynaImine reduction is one of the most frequently used transformations in organic synthesis. In this work, we developed novel partially carbonized chitin/Ru microspheres (PCRuMs) featuring a tightly assembled nanofiber structure as a highly efficient catalyst of imine hydroboration for the first time. The hydroboration using HBpin as the hydrogen … Witryna8 lis 2024 · The first use of diazaphospholenes as chiral catalysts has been demonstrated with enantioselective imine hydroboration. A chiral diazaphospholene prepared in a simple three-step synthesis from commercial materials has been shown to achieve the highest enantioselectivity for the hydroboration of alkyl imines with pinacolborane …
WitrynaInspired by the excellent performance of complex 2a in the hydroboration of C N bond, we next examined its application in the imine hydroboration, which provides an … Witryna1 sie 2024 · For the catalyst- and solvent-free hydroboration reaction of imine, N -benzylideneaniline, our calculations and experimental studies indicate that this …
Witrynaimine hydroboration reveals a first-order dependence on catalyst concentration. Both HBpin and 4-fluorophenyl-N-phenylmethanimine (1b) appear to exhibit saturation … 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 …
WitrynaThe β-diketiminato magnesium alkyl complex [LMgnBu] (L=CH{CMe(NDipp)} 2, Dipp=diisopropylphenyl) is shown to be a highly effective precatalyst for the …
Witryna16 wrz 2024 · Imine hydroboration has perennially featured in notable reports while nitrile and carbodiimide hydroboration have gained attention recently. Initial developments in catalytic hydroboration of ... iowa ground temperature isuWitryna15 cze 2024 · A final comment on imine hydroboration is that in both cases 1 (73 % 0.5 h) offers marginally less reactivity than 3 (80 % 0.5 h). This difference may describe a subtle alkyl versus amido effect, whereby the replacement of one TMP anion for an i Bu anion imparts greater nucleophilicity onto the hydride, priming it for addition across the ... opel crossland technische datenWitryna26 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 … iowa greyhound racing dubuqueWitryna3 kwi 2024 · The first catalytic inverse hydroboration of imines with N-heterocyclic carbene (NHC) boranes has been realized by means of cooperative organocatalysis and photocatalysis, providing a promising platform for promoting NHC-boryl radical chemistry under sustainable and radical-initiator-free conditions. The first catalytic inverse … opel crossland techn datenWitrynaWe 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 … opel crossland verbrauchiowa gross receipts taxWitryna17 wrz 2024 · Catalytic hydroboration of imines is a simple and straight-forward method for the preparation of amines, unlike conventional hydrogenation reactions and … opel crossland testberichte